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Journal articles on the topic 'Hierarchical cosmology'

Author: Grafiati

Published: 14 March 2023

Last updated: 31 July 2025

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1

Oldershaw, Robert L. "Hierarchical cosmology." Astrophysics and Space Science 189, no. 1 (1992): 163–68. http://dx.doi.org/10.1007/bf00642965.

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Kravtsov, Andrey V., and Oleg Y. Gnedin. "Formation of Globular Clusters in Hierarchical Cosmology." Astrophysical Journal 623, no. 2 (2005): 650–65. http://dx.doi.org/10.1086/428636.

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Hinton, S. R., T. M. Davis, A. G. Kim, et al. "Steve: A Hierarchical Bayesian Model for Supernova Cosmology." Astrophysical Journal 876, no. 1 (2019): 15. http://dx.doi.org/10.3847/1538-4357/ab13a3.

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Gnedin, Oleg Y., and José L. Prieto. "Dynamical Evolution of Globular Clusters in Hierarchical Cosmology." Proceedings of the International Astronomical Union 3, S246 (2007): 403–7. http://dx.doi.org/10.1017/s1743921308016049.

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AbstractWe probe the evolution of globular clusters that could form in giant molecular clouds within high-redshift galaxies. Numerical simulations demonstrate that the large and dense enough gas clouds assemble naturally in current hierarchical models of galaxy formation. These clouds are enriched with heavy elements from earlier stars and could produce star clusters in a similar way to nearby molecular clouds. The masses and sizes of the model clusters are in excellent agreement with the observations of young massive clusters. Do these model clusters evolve into globular clusters that we see

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OLDERSHAW, ROBERT L. "QUANTITATIVE SCALING FOR THE SELF-SIMILAR HIERARCHICAL COSMOLOGY." International Journal of General Systems 12, no. 2 (1986): 137–48. http://dx.doi.org/10.1080/03081078608934931.

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Prieto, José L., and Oleg Y. Gnedin. "Dynamical Evolution of Globular Clusters in Hierarchical Cosmology." Astrophysical Journal 689, no. 2 (2008): 919–35. http://dx.doi.org/10.1086/591777.

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Alfian, Andi. "Evaluating World Religion Paradigm through the Idea of Ultimate Reality." Islam Transformatif : Journal of Islamic Studies 6, no. 1 (2022): 63. http://dx.doi.org/10.30983/it.v6i1.5537.

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<p>This study aims to evaluate whether the idea of ultimate reality in world religions contributes to the characteristics of the world religion paradigm, which is hierarchical cosmology or “subject-object cosmology.” Several research on this topic claims that one of the characteristics of the world religion paradigm is its hierarchical perspective. Discussing this issue is important to distinguish the world religions as the paradigm and the world religions as the most widely embraced religion. This study argues that the hierarchical perspective of the world religion paradigm can be roote

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Bouchet, François R., and Lars Hernquist. "Implementation of a Tree Code for Cosmology." Symposium - International Astronomical Union 130 (1988): 563. http://dx.doi.org/10.1017/s0074180900136915.

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We have adapted the Barnes-Hut hierarchical N-body method for cosmological applications. A detailed study of the resulting code yielded the following conclusions: it is SIMPLE, FLEXIBLE, ACCURATE, ROBUST, and EFFICIENT.

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Bolejko, Krzysztof, and Mikołaj Korzyński. "Inhomogeneous cosmology and backreaction: Current status and future prospects." International Journal of Modern Physics D 26, no. 06 (2017): 1730011. http://dx.doi.org/10.1142/s0218271817300117.

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Astronomical observations reveal hierarchical structures in the universe, from galaxies, groups of galaxies, clusters and superclusters, to filaments and voids. On the largest scales, it seems that some kind of statistical homogeneity can be observed. As a result, modern cosmological models are based on spatially homogeneous and isotropic solutions of the Einstein equations, and the evolution of the universe is approximated by the Friedmann equations. In parallel to standard homogeneous cosmology, the field of inhomogeneous cosmology and backreaction is being developed. This field investigates

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Anninos, Peter, Michael L. Norman, and David A. Clarke. "Hierarchical numerical cosmology with hydrodynamics: Methods and code tests." Astrophysical Journal 436 (November 1994): 11. http://dx.doi.org/10.1086/174876.

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OLDERSHAW, ROBERT L. "SET THEORY APPLIED TO THE SELF-SIMILAR HIERARCHICAL COSMOLOGY." International Journal of General Systems 10, no. 4 (1985): 235–55. http://dx.doi.org/10.1080/03081078508934891.

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Anninos, Peter, and Michael L. Norman. "Hierarchical Numerical Cosmology with Hydrodynamics: Resolving X-Ray Clusters." Astrophysical Journal 459 (March 1996): 12. http://dx.doi.org/10.1086/176865.

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Colantonio, Arturo, Irene Marzoli, Italo Testa, and Emanuella Puddu. "An investigation on conceptual understanding about cosmology." Proceedings of the International Astronomical Union 15, S367 (2019): 397–99. http://dx.doi.org/10.1017/s174392132100096x.

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AbstractIn this study, we identify patterns among students beliefs and ideas in cosmology, in order to frame meaningful and more effective teaching activities in this amazing content area. We involve a convenience sample of 432 high school students. We analyze students’ responses to an open-ended questionnaire with a non-hierarchical cluster analysis using the k-means algorithm.

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Hahn, ChangHoon, Francisco Villaescusa-Navarro, Peter Melchior, and Romain Teyssier. "Cosmology with Galaxy Photometry Alone." Astrophysical Journal Letters 966, no. 1 (2024): L18. http://dx.doi.org/10.3847/2041-8213/ad3f1e.

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Abstract We present the first cosmological constraints using only the observed photometry of galaxies. Villaescusa-Navarro et al. recently demonstrated that the internal physical properties of a single simulated galaxy contain a significant amount of cosmological information. These physical properties, however, cannot be directly measured from observations. In this work, we present how we can go beyond theoretical demonstrations to infer cosmological constraints from actual galaxy observables (e.g., optical photometry) using neural density estimation and the CAMELS suite of hydrodynamical simu

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Mekjian, Aram Z. "Generalized Statistical Models of Voids and Hierarchical Structure in Cosmology." Astrophysical Journal 655, no. 1 (2007): 1–10. http://dx.doi.org/10.1086/508151.

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Grujic, Petar. "The concept of fractal cosmos: II Modern cosmology." Serbian Astronomical Journal, no. 165 (2002): 45–65. http://dx.doi.org/10.2298/saj0265045g.

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Development of the concept of fractal cosmos after Anaxagoras has been followed up to the present. It is shown how the concept reappeared in the early Renaissance as a vague idea and subsequently took up a concrete formulation at the beginning of the 20-eth century. The modern cosmology state of affairs has been considered in view of the fractal paradigm and the current disputes and controversies discussed. It is argued that the concept of the hierarchical cosmos is still alive and might become an essential ingredient within the modern view of the universe.

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Uzukwu, Gesila Nneka. "African Cosmology, Hierarchies of Power, and Slave Dynamics in the Book of Philemon." Journal for the Study of the New Testament 47, no. 1 (2024): 141–60. http://dx.doi.org/10.1177/0142064x241261641.

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Past scholarship on Philemon has reiterated the cultural and institutional power of slavery with particular attention to the acceptance and use of slavery as an important instrument of control and domination. Working within this scholarship, the present work acknowledges the centrality of the preceding thesis, but engages the letter to Philemon from the perspective of the inherent cosmology which accepted the master/slave hierarchical structure within a religious framework in explaining human/divine encounters, and encounters among human beings. Since African cosmology exhibits interesting poi

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Payne, Ethan, Ling Sun, Kyle Kremer, Paul D. Lasky, and Eric Thrane. "The Imprint of Superradiance on Hierarchical Black Hole Mergers." Astrophysical Journal 931, no. 2 (2022): 79. http://dx.doi.org/10.3847/1538-4357/ac66df.

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Abstract Ultralight bosons are a proposed solution to outstanding problems in cosmology and particle physics: they provide a dark-matter candidate while potentially explaining the strong charge-parity problem. If they exist, ultralight bosons can interact with black holes through the superradiant instability. In this work we explore the consequences of this instability on the evolution of hierarchical black holes within dense stellar clusters. By reducing the spin of individual black holes, superradiance reduces the recoil velocity of merging binary black holes, which, in turn, increases the r

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Ribeiro, Marcelo B. "On modeling a relativistic hierarchical (fractal) cosmology by Tolman's spacetime. I - Theory." Astrophysical Journal 388 (March 1992): 1. http://dx.doi.org/10.1086/171123.

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MARFATIA, DANNY. "COSMOLOGY AND HIERARCHY IN STABILIZED RANDALL-SUNDRUM MODELS." International Journal of Modern Physics A 16, supp01c (2001): 946–48. http://dx.doi.org/10.1142/s0217751x01008576.

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We consider the cosmology and hierarchy of scales in models with immersed in a five-dimensional curved spacetime subject to radion stabilization. The universe naturally find itself in the radiation-dominated epoch when the inter-brane spacing is static and stable, independent of the form of the stabilizing potential. We recover the standard Friedmann equations without assuming a specific form for the bulk energy-momentum tensor. We address the hierarchy problem in the context of a quartic and exponential stabilizing potential, and find that in either case the presence of a negative tension bra

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21

Stephenson, David. "Optics and Cosmology: from Euclid to Freud." Culture and Cosmos 26, no. 01 (2022): 95–108. http://dx.doi.org/10.46472/cc.0126.0209.

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This paper explores how the scientific materialist worldview, where any inexplicable phenomenon is regarded as an artefact of incomplete understanding or error, arose from earlier models of the cosmos. In these earlier cosmologies, the mysterious remained an important component and the role of light was a key factor in expressing an ordered hierarchical ontology. Demonstrating the role of optics in the development and evolution of our understanding of the cosmos, the conception of light in the writings of Euclid, Plato and Ficino is surveyed. It is postulated that light starts off as an aspect

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Ribeiro, Marcelo B. "On Modeling a Relativistic Hierarchical (Fractal) Cosmology by Tolman's Spacetime. III. Numerical Results." Astrophysical Journal 415 (October 1993): 469. http://dx.doi.org/10.1086/173179.

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Lan, Zhiling, Valerie E. Taylor, and Yawei Li. "DistDLB: Improving cosmology SAMR simulations on distributed computing systems through hierarchical load balancing." Journal of Parallel and Distributed Computing 66, no. 5 (2006): 716–31. http://dx.doi.org/10.1016/j.jpdc.2006.01.001.

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Cheng (程思浩), Sihao, Yuan-Sen Ting (丁源森), Brice Ménard, and Joan Bruna. "A new approach to observational cosmology using the scattering transform." Monthly Notices of the Royal Astronomical Society 499, no. 4 (2020): 5902–14. http://dx.doi.org/10.1093/mnras/staa3165.

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ABSTRACT Parameter estimation with non-Gaussian stochastic fields is a common challenge in astrophysics and cosmology. In this paper, we advocate performing this task using the scattering transform, a statistical tool sharing ideas with convolutional neural networks (CNNs) but requiring neither training nor tuning. It generates a compact set of coefficients, which can be used as robust summary statistics for non-Gaussian information. It is especially suited for fields presenting localized structures and hierarchical clustering, such as the cosmological density field. To demonstrate its power,

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Brodie, Jean P., and Aaron Romanowsky. "Kinematics and Angular Momentum in Early Type Galaxy Halos." Proceedings of the International Astronomical Union 11, S317 (2015): 190–96. http://dx.doi.org/10.1017/s1743921315010959.

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AbstractWe use the kinematics of discrete tracers, primarily globular clusters (GCs) and planetary nebulae (PNe), along with measurements of the integrated starlight to explore the assembly histories of early type galaxies. Data for GCs and stars are taken from the SLUGGS wide field, 2-dimensional, chemo-dynamical survey (Brodie et al. 2014). Data for PNe are from the PN.S survey (see contributions by Gerhard and by Arnaboldi, this volume). We find widespread evidence for 2-phase galaxy assembly and intriguing constraints on hierarchical merging under a lambda CDM cosmology.

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Murtagh, Fionn. "Hierarchical Matching and Regression with Application to Photometric Redshift Estimation." Proceedings of the International Astronomical Union 12, S325 (2016): 145–55. http://dx.doi.org/10.1017/s1743921317001569.

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AbstractThis work emphasizes that heterogeneity, diversity, discontinuity, and discreteness in data is to be exploited in classification and regression problems. A global a priori model may not be desirable. For data analytics in cosmology, this is motivated by the variety of cosmological objects such as elliptical, spiral, active, and merging galaxies at a wide range of redshifts. Our aim is matching and similarity-based analytics that takes account of discrete relationships in the data. The information structure of the data is represented by a hierarchy or tree where the branch structure, ra

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Dam, Lawrence. "A probabilistic framework for cosmological inference of peculiar velocities." Monthly Notices of the Royal Astronomical Society 497, no. 2 (2020): 1301–19. http://dx.doi.org/10.1093/mnras/staa2040.

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ABSTRACT We present a Bayesian hierarchical framework for a principled data analysis pipeline of peculiar velocity surveys, which makes explicit the inference problem of constraining cosmological parameters from redshift-independent distance indicators. We demonstrate our method for a Fundamental Plane (FP)-based survey. The essence of our approach is to work closely with observables (e.g. angular size, surface brightness, redshift, etc.), through which we bypass the use of summary statistics by working with the probability distributions. The hierarchical approach improves upon the usual analy

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Bergamini, P., A. Agnello, and G. B. Caminha. "Cluster strong lensing with hierarchical inference." Astronomy & Astrophysics 648 (April 2021): A123. http://dx.doi.org/10.1051/0004-6361/201937138.

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Context. Lensing by galaxy clusters is a versatile probe of cosmology and extragalactic astrophysics, but the accuracy of some of its predictions is limited by the simplified models adopted to reduce the (otherwise intractable) number of degrees of freedom. Aims. We aim to explore cluster lensing models in which the parameters of all cluster member galaxies are free to vary around some common scaling relations with non-zero scatter and deviate significantly from these relations if, and only if, the data require this. Methods. We devised a Bayesian hierarchical inference framework that enables

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Rubin, David, G. Aldering, P. Antilogus, et al. "Uniform Recalibration of Common Spectrophotometry Standard Stars onto the CALSPEC System Using the SuperNova Integral Field Spectrograph." Astrophysical Journal Supplement Series 263, no. 1 (2022): 1. http://dx.doi.org/10.3847/1538-4365/ac7b7f.

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Abstract We calibrate spectrophotometric optical spectra of 32 stars commonly used as standard stars, referenced to 14 stars already on the Hubble Space Telescope–based CALSPEC flux system. Observations of CALSPEC and non-CALSPEC stars were obtained with the SuperNova Integral Field Spectrograph over the wavelength range 3300–9400 Å as calibration for the Nearby Supernova Factory cosmology experiment. In total, this analysis used 4289 standard-star spectra taken on photometric nights. As a modern cosmology analysis, all presubmission methodological decisions were made with the flux scale and e

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Adistira, Gagas. "Gedung Pelayanan Publik dan Ruang Kreatif di Sukabumi dengan Pendekatan Arsitektur Neo Vernakular." Jurnal Arsitektur Wastu Padma 2, no. 2 (2024): 131–42. https://doi.org/10.62024/jawp.v2i2.48.

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The design of the Public Service Mall Building in Sukabumi aims to integrate public service facilities with creative spaces to meet the needs of the community. The two containers have different characters but have similarities as spaces for community visits. Through the Neo Vernacular architectural approach, the building and environmental design is expected to accommodate local architectural values adapted to contemporary technology. The research was carried out by taking a contextual approach to the environment and studying local architecture. From the discussion, the principle of hierarchi

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Hanselman, Alexandra G., Aditya Vijaykumar, Maya Fishbach, and Daniel E. Holz. "Gravitational-wave Dark Siren Cosmology Systematics from Galaxy Weighting." Astrophysical Journal 979, no. 1 (2025): 9. https://doi.org/10.3847/1538-4357/ad9393.

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Abstract The detection of GW170817 and the measurement of its redshift from the associated electromagnetic counterpart provided the first gravitational-wave (GW) determination of the Hubble constant (H 0), demonstrating the potential power of standard siren cosmology. In contrast to this “bright siren” approach, the “dark siren” approach can be utilized for GW sources in the absence of an electromagnetic counterpart: One considers all galaxies contained within the localization volume as potential hosts. When statistically averaging over the potential host galaxies, weighting them by physically

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Umbu Deta, Krisharyanto. "Marapu Resisting the Corporation to Protect the Land." Satya Widya: Jurnal Studi Agama 4, no. 2 (2021): 50–66. http://dx.doi.org/10.33363/swjsa.v4i2.765.

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The establishment of a sugar cane plantation in East Sumba has evoked conflicts and resistance from the local people. The damage to the katoda (sites to perform rituals) portrays one of the other violations causing environmental, cultural, and social damages related to the manipulation of customary land and criminalization of local people. This paper aims to discuss this conflict by accentuating, and also promoting, the paradigm of indigenous religion as a tool to understand the resistance of the Marapu community to protect their land. Indigenous Religion Paradigm implies the inter-subjective

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Ward, Sam M., Stephen Thorp, Kaisey S. Mandel, et al. "Relative Intrinsic Scatter in Hierarchical Type Ia Supernova Sibling Analyses: Application to SNe 2021hpr, 1997bq, and 2008fv in NGC 3147." Astrophysical Journal 956, no. 2 (2023): 111. http://dx.doi.org/10.3847/1538-4357/acf7bb.

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Abstract We present Young Supernova Experiment grizy photometry of SN 2021hpr, the third Type Ia supernova sibling to explode in the Cepheid calibrator galaxy, NGC 3147. Siblings are useful for improving SN-host distance estimates and investigating their contributions toward the SN Ia intrinsic scatter (post-standardization residual scatter in distance estimates). We thus develop a principled Bayesian framework for analyzing SN Ia siblings. At its core is the cosmology-independent relative intrinsic scatter parameter, σ Rel: the dispersion of siblings distance estimates relative to one another

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Suzuki, Takeru K., and Susumu Inoue. "Cosmic Ray Production of 6Li by Virialisation Shocks in the Early Milky Way." Publications of the Astronomical Society of Australia 21, no. 2 (2004): 148–52. http://dx.doi.org/10.1071/as04026.

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AbstractThe energy dissipated by virialisation shocks during hierarchical structure formation of the Galaxy can exceed that injected by concomitant supernova (SN) explosions. Cosmic rays (CRs) accelerated by such shocks may therefore dominate over SNe in the production of 6Li through α + α fusion without co-producing Be and B. This process can give a more natural account of the observed 6Li abundance in metal-poor stars compared to standard SN CR scenarios. Future searches for correlations between the 6Li abundance and the kinematic properties of halo stars may constitute an important probe of

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Arshakian, Tigran G., Rainer Beck, Marita Krause, and Dimitry Sokoloff. "Testing the cosmological evolution of magnetic fields in galaxies with the SKA." Proceedings of the International Astronomical Union 4, S259 (2008): 667–68. http://dx.doi.org/10.1017/s1743921309031512.

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AbstractWe investigate the cosmological evolution of large- and small-scale magnetic fields in galaxies at high redshifts. Results from simulations of hierarchical structure formation cosmology provide a tool to develop an evolutionary model of regular magnetic fields coupled to galaxy formation and evolution. Turbulence in protogalactic halos generated by thermal virialization can drive an efficient turbulent dynamo. The mean-field dynamo theory is used to derive the timescales of amplification and ordering of regular magnetic fields in disk and dwarf galaxies. For future observations with th

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UGGLA, CLAES. "SPACETIME SINGULARITIES: RECENT DEVELOPMENTS." International Journal of Modern Physics D 22, no. 03 (2013): 1330002. http://dx.doi.org/10.1142/s0218271813300024.

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Recent developments concerning oscillatory spacelike singularities in general relativity are taking place on two fronts. The first treats generic singularities in spatially homogeneous cosmology, most notably Bianchi types VIII and IX. The second deals with generic oscillatory singularities in inhomogeneous cosmologies, especially those with two commuting spacelike Killing vectors. This paper describes recent progress in these two areas: in the spatially homogeneous case, focus is on mathematically rigorous results, while analytical and numerical results concerning generic behavior and so-call

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Okamoto, Takashi, and Masahiro Nagashima. "Environmental Effects on Evolution of Cluster Galaxies." Symposium - International Astronomical Union 208 (2003): 435–36. http://dx.doi.org/10.1017/s0074180900207638.

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Using a combination of a cosmological N-body simulation and a semi-analytic galaxy formation model, we investigate environmental effects on cluster galaxies with the ACDM cosmology. We find that stripping of hot gas from galacitc halos as they infall into larger objects sufficiently suppresses star formation in the cluster and successfully reproduces the observed gradients of SFR when we normalize our model to reproduce the observed properties of local galaxies. Consequently, the effect of ram-pressure stripping of cold gas from galactic disks becomes quite small and it is observationally negl

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Garrity-Bond, Cynthia. "Ecofeminist Epistemology in Vandana Shiva’s The Feminine Principle of Prakriti and Ivone Gebara’s Trinitarian Cosmology." Feminist Theology 26, no. 2 (2018): 185–94. http://dx.doi.org/10.1177/0966735017738660.

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The ecofeminist cosmologies of Indian scientist Vandana Shiva and Catholic theologian Ivone Gebara are examined. At the centre of each author’s discourse is their feminist epistemology that occasion a new way of knowing, incorporating each thinker’s social locations as nexus for authority. For Shiva, the feminine principle of Prakriti, or the awareness of nature as a living, interdependent force, is realized through the inclusion of women as sources of expertise and knowledge. Gebara rejects classical theology and philosophy as androcentric, anthropocentric, and hierarchical. Instead Gebara en

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Lewis, David. "Problematising Hierarchy and Dualism for Ecological Concern: Johnsen’s Decolonial Methodology in Defence of Non-Hierarchical Worldmaking." Studies in World Christianity 30, no. 1 (2024): 62–79. http://dx.doi.org/10.3366/swc.2024.0458.

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The climate crisis presents an urgent problem for World Christianity. Since Lynn White, Jr., argued that ‘Christianity is the most anthropocentric religion the world has seen’ (White 1967), theologians have debated to what extent Christianity is responsible for ecological crisis. In this article, I will focus on two related problems for Christian thought that Majority World theologians have highlighted – hierarchy and dualism – in order to postulate what a non-hierarchical Christian worldview might entail, drawing on the work of Sámi Norwegian Lutheran theologian Tore Johnsen, primarily his re

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Leistedt, Boris, Justin Alsing, Hiranya Peiris, Daniel Mortlock, and Joel Leja. "Hierarchical Bayesian Inference of Photometric Redshifts with Stellar Population Synthesis Models." Astrophysical Journal Supplement Series 264, no. 1 (2023): 23. http://dx.doi.org/10.3847/1538-4365/ac9d99.

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Abstract We present a Bayesian hierarchical framework to analyze photometric galaxy survey data with stellar population synthesis (SPS) models. Our method couples robust modeling of spectral energy distributions with a population model and a noise model to characterize the statistical properties of the galaxy populations and real observations, respectively. By self-consistently inferring all model parameters, from high-level hyperparameters to SPS parameters of individual galaxies, one can separate sources of bias and uncertainty in the data. We demonstrate the strengths and flexibility of thi

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Tadd, Misha. "Ziran: Authenticity or Authority?" Religions 10, no. 3 (2019): 207. http://dx.doi.org/10.3390/rel10030207.

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This essay explores the core Daoist concept of ziran (commonly translated as spontaneity, naturalness, or self-so) and its relationship to authenticity and authority. Modern scholarship has often followed the interpretation of Guo Xiang (d. 312) in taking ziran as spontaneous individual authenticity completely unreliant on any external authority. This form of Daoism emphasizes natural transformations and egalitarian society. Here, the author draws on Heshanggong’s Commentary on the Daodejing to reveal a drastically dissimilar ziran conception based on the authority of the transcendent Way. The

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Bertelsen, Bjørn Enge. "Egalitarian Lives and Violence." Social Analysis 66, no. 3 (2022): 104–25. http://dx.doi.org/10.3167/sa.2022.660306.

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Abstract Since independence in 1975, Mozambique has experimented with society-state relations, including an Afro-socialist revolutionary transformation followed by a multi-party democracy with nominal state functions, such as policing. Building on fieldwork, this article analyzes the genealogy and practices of community policing, arguing that while its emergence reflects a global transformation of state apparatuses reliant on securitization, this transition is still in progress. Community policing practices interconnect with both (petty and organized) crime and nominally past experiments in re

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Chung, Chul, Seunghyun Park, Junhyuk Son, Hyejeon Cho, and Young-Wook Lee. "Strong progenitor age bias in supernova cosmology – I. Robust and ubiquitous evidence from a larger sample of host galaxies in a broader redshift range." Monthly Notices of the Royal Astronomical Society 538, no. 4 (2025): 3340–50. https://doi.org/10.1093/mnras/staf497.

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ABSTRACT Type Ia supernovae (SNe Ia) serve as the most crucial standardizable candles in cosmology, providing direct measurements of the Universe’s expansion history. However, it is well known that the post-standardization brightness of SNe Ia is influenced by the properties of their host galaxies, such as mass and star formation rate, both of which are closely related to progenitor age. In this study, by measuring the stellar population ages of SN host galaxies, we reaffirm the ubiquitous and robust correlation between SN Ia luminosity and host age, showing that this host property dependence

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Leclercq, Florent, and Alan Heavens. "On the accuracy and precision of correlation functions and field-level inference in cosmology." Monthly Notices of the Royal Astronomical Society: Letters 506, no. 1 (2021): L85—L90. http://dx.doi.org/10.1093/mnrasl/slab081.

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ABSTRACT We present a comparative study of the accuracy and precision of correlation function methods and full-field inference in cosmological data analysis. To do so, we examine a Bayesian hierarchical model that predicts lognormal (LN) fields and their two-point correlation function. Although a simplified analytic model, the LN model produces fields that share many of the essential characteristics of the present-day non-Gaussian cosmological density fields. We use three different statistical techniques: (i) a standard likelihood-based analysis of the two-point correlation function; (ii) a li

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Ribeiro, Marcelo B. "On modeling a relativistic hierarchical (fractal) cosmology by Tolman's spacetime. II - Analysis of the Einstein-de Sitter model." Astrophysical Journal 395 (August 1992): 29. http://dx.doi.org/10.1086/171628.

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Käfer, Florian, Alexis Finoguenov, Dominique Eckert, Jeremy S. Sanders, Thomas H. Reiprich, and Kirpal Nandra. "Toward a characterization of X-ray galaxy clusters for cosmology." Astronomy & Astrophysics 628 (August 2019): A43. http://dx.doi.org/10.1051/0004-6361/201935124.

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Context. In the framework of the hierarchical model the intra-cluster medium properties of galaxy clusters are tightly linked to structure formation, which makes X-ray surveys well suited for cosmological studies. To constrain cosmological parameters accurately by use of galaxy clusters in current and future X-ray surveys, a better understanding of selection effects related to the detection method of clusters is needed. Aims. We aim at a better understanding of the morphology of galaxy clusters to include corrections between the different core types and covariances with X-ray luminosities in s

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Haslbauer, Moritz, Indranil Banik, Pavel Kroupa, Nils Wittenburg та Behnam Javanmardi. "The High Fraction of Thin Disk Galaxies Continues to Challenge ΛCDM Cosmology". Astrophysical Journal 925, № 2 (2022): 183. http://dx.doi.org/10.3847/1538-4357/ac46ac.

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Abstract Any viable cosmological framework has to match the observed proportion of early- and late-type galaxies. In this contribution, we focus on the distribution of galaxy morphological types in the standard model of cosmology (Lambda cold dark matter, ΛCDM). Using the latest state-of-the-art cosmological ΛCDM simulations known as Illustris, IllustrisTNG, and EAGLE, we calculate the intrinsic and sky-projected aspect ratio distribution of the stars in subhalos with stellar mass M * > 1010 M ⊙ at redshift z = 0. There is a significant deficit of intrinsically thin disk galaxies, which how

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Jiang, Wenkang, Jiaxin Han, Fuyu Dong, and Feihong He. "Self-similar Decomposition of the Hierarchical Merger Tree of Dark Matter Halos." Astrophysical Journal 988, no. 2 (2025): 160. https://doi.org/10.3847/1538-4357/ade439.

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Abstract In the ΛCDM universe, structure formation is generally not a self-similar process, while some self-similarity remains in certain statistics, which can greatly simplify our description and understanding of the cosmic structures. In this work, we show that the merger tree of dark matter halos is approximately self-similar by investigating the universality of the subhalo peak mass function (PMF) describing the mass distribution of progenitor halos. Using a set of cosmological simulations and identifying subhalos of different merger levels with hbt+, we verify that the level-1 subhalo PMF

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McCauley, Joseph L. "The Galaxy Distribution." Fractals 06, no. 02 (1998): 109–19. http://dx.doi.org/10.1142/s0218348x98000134.

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From the standpoint of theoretical physics we can treat Newtonian cosmology as a problem in nonlinear dynamics. The attempt to average the density, in search of a method of making contact between theory and observation, is replaced by the more systematic idea of coarsegraining. I also explain in this context why two previous attempts at the construction of hierarchical models of the universe are not useful for data analysis. The main ideas behind two older competing data analyses purporting to show evidence from galaxy statistics for either a homogeneous and isotropic universe in one case, and

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Adamson, Peter, та Hanif Amin Beidokhti. "The Necessity and Goodness of Animals in Sijistānī’s Kashf Al-Maḥjūb". Philosophies 9, № 3 (2024): 72. http://dx.doi.org/10.3390/philosophies9030072.

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The Neoplatonic notion of “emanation” implies a required progression through hierarchical stages, originating from the highest principle (the One or God) and cascading down through a series of principles. While this process is deemed necessary, it is also inherently good, even “choiceworthy”, aligning with the identification of the first principle with the Good. Plotinus, a prominent Neoplatonist, emphasizes the beauty and goodness of the sensible world, governed by divine providence. This perspective, transmitted through Arabic adaptations of Plotinus, influences Islamic philosophers too. Thi

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