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Articles de revues sur le sujet "Cosmic microwave background anomalies"

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Axelsson, Magnus, Frode Hansen, Tomi Koivisto, and David F. Mota. "Cosmic microwave background anomalies from imperfect dark energy." Astronomy & Astrophysics 564 (April 2014): A113. http://dx.doi.org/10.1051/0004-6361/201322051.

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Mikelsons, Gatis, Joseph Silk, and Joe Zuntz. "Cosmic microwave background anomalies viewed via Gumbel statistics." Monthly Notices of the Royal Astronomical Society 400, no. 2 (2009): 898–902. http://dx.doi.org/10.1111/j.1365-2966.2009.15503.x.

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Land, K., and J. Magueijo. "Template fitting and the large-angle cosmic microwave background anomalies." Monthly Notices of the Royal Astronomical Society 367, no. 4 (2006): 1714–20. http://dx.doi.org/10.1111/j.1365-2966.2006.10078.x.

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Hansen, F. K., T. Trombetti, N. Bartolo, et al. "Isotropic non-Gaussian gNL-like toy models that reproduce cosmic microwave background anomalies." Astronomy & Astrophysics 626 (June 2019): A13. http://dx.doi.org/10.1051/0004-6361/201833698.

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Context. Based on recent observations of the cosmic microwave background (CMB), claims of statistical anomalies in the properties of the CMB fluctuations have been made. Although the statistical significance of the anomalies remains only at the ∼2−3σ significance level, the fact that there are many different anomalies, several of which support a possible deviation from statistical isotropy, has motivated a search for models that provide a common mechanism to generate them. Aims. The goal of this paper is to investigate whether these anomalies could originate from non-Gaussian cosmological mode
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Shi, Rui, Tobias A. Marriage, John W. Appel, et al. "Testing Cosmic Microwave Background Anomalies in E-mode Polarization with Current and Future Data." Astrophysical Journal 945, no. 1 (2023): 79. http://dx.doi.org/10.3847/1538-4357/acb339.

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Abstract In this paper, we explore the power of the cosmic microwave background (CMB) polarization (E-mode) data to corroborate four potential anomalies in CMB temperature data: the lack of large angular-scale correlations, the alignment of the quadrupole and octupole (Q–O), the point-parity asymmetry, and the hemispherical power asymmetry. We use CMB simulations with noise representative of three experiments—the Planck satellite, the Cosmology Large Angular Scale Surveyor (CLASS), and the LiteBIRD satellite—to test how current and future data constrain the anomalies. We find the correlation c
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Abramo, L. Raul, and Thiago S. Pereira. "Testing Gaussianity, Homogeneity, and Isotropy with the Cosmic Microwave Background." Advances in Astronomy 2010 (2010): 1–25. http://dx.doi.org/10.1155/2010/378203.

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We review the basic hypotheses which motivate the statistical framework used to analyze the cosmic microwave background, and how that framework can be enlarged as we relax those hypotheses. In particular, we try to separate as much as possible the questions of gaussianity, homogeneity, and isotropy from each other. We focus both on isotropic estimators of nongaussianity as well as statistically anisotropic estimators of gaussianity, giving particular emphasis on their signatures and the enhanced “cosmic variances” that become increasingly important as our putative Universe becomes less symmetr
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Ríos, Carlos, Pedro Labraña, and Antonella Cid. "The Emergent Universe and the Anomalies in the Cosmic Microwave Background." Journal of Physics: Conference Series 720 (May 2016): 012008. http://dx.doi.org/10.1088/1742-6596/720/1/012008.

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Bennett, C. L., R. S. Hill, G. Hinshaw, et al. "SEVEN-YEAR WILKINSON MICROWAVE ANISOTROPY PROBE ( WMAP ) OBSERVATIONS: ARE THERE COSMIC MICROWAVE BACKGROUND ANOMALIES?" Astrophysical Journal Supplement Series 192, no. 2 (2011): 17. http://dx.doi.org/10.1088/0067-0049/192/2/17.

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Bojowald, Martin. "Cosmic Tangle: Loop Quantum Cosmology and CMB Anomalies." Universe 7, no. 6 (2021): 186. http://dx.doi.org/10.3390/universe7060186.

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Loop quantum cosmology is a conflicted field in which exuberant claims of observability coexist with serious objections against the conceptual and physical viability of its current formulations. This contribution presents a non-technical case study of the recent claim that loop quantum cosmology might alleviate anomalies in the observations of the cosmic microwave background.
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Copi, Craig J., Dragan Huterer, Dominik J. Schwarz, and Glenn D. Starkman. "Large-Angle Anomalies in the CMB." Advances in Astronomy 2010 (2010): 1–17. http://dx.doi.org/10.1155/2010/847541.

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We review the recently found large-scale anomalies in the maps of temperature anisotropies in the cosmic microwave background. These include alignments of the largest modes of CMB anisotropy with each other and with geometry and direction of motion of the solar ssystem, and the unusually low power at these largest scales. We discuss these findings in relation to expectation from standard inflationary cosmology, their statistical significance, the tools to study them, and the various attempts to explain them.
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Thèses sur le sujet "Cosmic microwave background anomalies"

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Land, Katharine Rosemary. "Exploring anomalies in the cosmic microwave background." Thesis, Imperial College London, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.440501.

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O'Dwyer, Marcio. "Investigating Large Scale Anomalies of the Cosmic Microwave Background." Case Western Reserve University School of Graduate Studies / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=case1568822013962258.

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Yamauchi, Daisuke. "Cosmic Microwave Background from Cosmic Strings/Cosmic Superstrings." 京都大学 (Kyoto University), 2011. http://hdl.handle.net/2433/142378.

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Liu, Guochin. "Polarization of the Cosmic Microwave Background." 京都大学 (Kyoto University), 2001. http://hdl.handle.net/2433/150829.

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Griffiths, Louise M. "The cosmic microwave background power spectrum." Thesis, University of Oxford, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.249266.

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Banday, Anthony John. "Fluctuations in the cosmic microwave background." Thesis, Durham University, 1991. http://etheses.dur.ac.uk/6284/.

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The search for fluctuations in the Cosmic Microwave Background (CMB) is one of the most important topics in modern cosmology, since their detection would reveal a great many details about the early universe and, in particular, the nature of the primordial density perturbations giving rise to the galaxies and clusters of galaxies seen in the universe today. However, the search for such anisotropies is not trivial- none have been detected as yet - largely as a consequence of the fact that all radiative astrophysical sources can give rise to anisotropic foregrounds which confuse the search for ge
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Zaldarriaga, Matias 1971. "Fluctuations in the cosmic microwave background." Thesis, Massachusetts Institute of Technology, 1998. http://hdl.handle.net/1721.1/50007.

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Preece, Michael Alan. "Analysis of cosmic microwave background polarisation." Thesis, University of Manchester, 2011. https://www.research.manchester.ac.uk/portal/en/theses/analysis-of-cosmic-microwave-background-polarisation(06cf26fc-2604-4955-9980-94457ac8458c).html.

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Observations of the Cosmic Microwave Background (CMB) radiation are an extremely important tool for understanding the Universe. The next generation of CMB experiments will attempt to measure the polarisation signal. In particular, the detection of B-mode polarisation, which is mainly generated by gravitational waves from the very early Universe, would provide a strong indicator for the energy level of inflation. However, due to the relative weakness of this signal, and the fact that there exists a much stronger E-mode signal, detecting B-modes polarisation poses several technical challenges. I
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Watson, Laura. "Signatures of cosmic topology in the polarised cosmic microwave background." Thesis, Imperial College London, 2014. http://hdl.handle.net/10044/1/25264.

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Cosmic topology is difficult to constrain due to the lack of observable phenomena which are affected by this property of the Universe. The phenomenon with the most potential to reveal cosmic topology is the cosmic microwave background (CMB). The task of constraining topology with the CMB is challenging, and so the more data that is utilised the better. This thesis sets out a method that uses the full information available from the CMB, including polarisation, in the form of a Bayesian analysis of the full correlation matrix of the CMB. A catalogue of flat spaces is presented, of which four are
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Landriau, Martin. "Fluctuations in the cosmic microwave background seeded by cosmic strings." Thesis, University of Cambridge, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.619791.

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Livres sur le sujet "Cosmic microwave background anomalies"

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Fabris, Júlio C., Oliver F. Piattella, Davi C. Rodrigues, Hermano E. S. Velten, and Winfried Zimdahl, eds. The Cosmic Microwave Background. Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-44769-8.

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Evans, Rhodri. The Cosmic Microwave Background. Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-09928-6.

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Lineweaver, C. H., J. G. Bartlett, A. Blanchard, M. Signore, and J. Silk, eds. The Cosmic Microwave Background. Springer Netherlands, 1997. http://dx.doi.org/10.1007/978-94-009-0051-6.

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H, Lineweaver C., North Atlantic Treaty Organization. Scientific Affairs Division., and NATO Advanced Study Institute on the Cosmological Background Radiation (1996 : Strasbourg, France), eds. The cosmic microwave background. Kluwer Academic Publishers, 1997.

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Angelica, De Oliveira-Costa, Tegmark Max, and Sloan Summit on Origins (1998-1999 : Princeton, N.J.), eds. Microwave foregrounds. Astronomical Society of the Pacific, 1999.

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Mandolesi, N., and N. Vittorio, eds. The Cosmic Microwave Background: 25 Years Later. Springer Netherlands, 1990. http://dx.doi.org/10.1007/978-94-009-0655-6.

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Partridge, R. B. 3 K: The cosmic microwave background radiation. Cambridge University Press, 1995.

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I, Novikov D., and Novikov I. D, eds. The physics of the cosmic microwave background. Cambridge University Press, 2006.

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International School of Physics "Enrico Fermi." (2004 July 6-16 Varenna, Italy). Background microwave radiation and intracluster cosmology. IOS Press, 2005.

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Pettinari, Guido Walter. The Intrinsic Bispectrum of the Cosmic Microwave Background. Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-21882-3.

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Chapitres de livres sur le sujet "Cosmic microwave background anomalies"

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Cherkas, S. L., and V. L. Kalashnikov. "Plasma Perturbations and Cosmic Microwave Background Anisotropy in the Linearly Expanding Milne-Like Universe." In Fractional Dynamics, Anomalous Transport and Plasma Science. Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-030-04483-1_9.

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Calcagni, Gianluca. "Cosmic Microwave Background." In Classical and Quantum Cosmology. Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-41127-9_4.

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Mather, John, Gary Hinshaw, and Lyman Page. "Cosmic Microwave Background." In Planets, Stars and Stellar Systems. Springer Netherlands, 2013. http://dx.doi.org/10.1007/978-94-007-5609-0_13.

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Mauskopf, Philip. "Cosmic Microwave Background." In Millimeter-Wave Astronomy: Molecular Chemistry & Physics in Space. Springer Netherlands, 1999. http://dx.doi.org/10.1007/978-94-011-4714-9_18.

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Bambi, Cosimo, and Alexandre D. Dolgov. "Cosmic Microwave Background." In UNITEXT for Physics. Springer Berlin Heidelberg, 2015. http://dx.doi.org/10.1007/978-3-662-48078-6_10.

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Snell, Ronald L., Stanley E. Kurtz, and Jonathan M. Marr. "Cosmic Microwave Background." In Fundamentals of Radio Astronomy. CRC Press, 2019. http://dx.doi.org/10.1201/9781498725798-10.

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Dünner, Rolando. "Cosmic Microwave Background Observations." In The Cosmic Microwave Background. Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-44769-8_5.

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Mohanty, Subhendra. "Cosmic Microwave Background Anisotropy." In Astroparticle Physics and Cosmology. Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-56201-4_4.

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Lamarre, Jean-Michel, and Hervé Dole. "The Cosmic Microwave Background." In Observing Photons in Space. Springer New York, 2013. http://dx.doi.org/10.1007/978-1-4614-7804-1_8.

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Evans, Rhodri. "The Cosmic Microwave Background." In Astronomers' Universe. Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-09928-6_3.

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Actes de conférences sur le sujet "Cosmic microwave background anomalies"

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Shinde, Saurabh. "Leveraging Conditional Generative Adversarial Networks for cosmic microwave background separation." In 2024 IEEE/ACIS 22nd International Conference on Software Engineering Research, Management and Applications (SERA). IEEE, 2024. http://dx.doi.org/10.1109/sera61261.2024.10685557.

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Leitner, Matthaeus, Jessica N. Aguilar, Zeeshan Ahmed, et al. "Project overview of the Stage-4 Cosmic Microwave Background experiment (CMB-S4)." In Ground-based and Airborne Telescopes X, edited by Heather K. Marshall, Jason Spyromilio, and Tomonori Usuda. SPIE, 2024. http://dx.doi.org/10.1117/12.3018095.

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PIERPAOLI, E. "THE COSMIC MICROWAVE BACKGROUND." In Proceedings of the Theoretical Advanced Study Institute in Elementary Particle Physics. WORLD SCIENTIFIC, 2011. http://dx.doi.org/10.1142/9789814327183_0012.

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Villela, Thyrso, Carlos Alexandre Wuensche, Mario Novello, and Santiago Perez. "Cosmic Microwave Background Physics: Observations." In COSMOLOGY AND GRAVITATION: XIII Brazilian School on Cosmology and Gravitation (XIII BSCG). AIP, 2009. http://dx.doi.org/10.1063/1.3151837.

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Burigana, Carlo. "Sunyaev-Zeldovich and Cosmic Microwave Background." In First MCCT-SKADS Training School. Sissa Medialab, 2008. http://dx.doi.org/10.22323/1.059.0013.

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GANGUI, ALEJANDRO. "UPDATE ON COSMIC MICROWAVE BACKGROUND PHYSICS." In Proceedings of the MG10 Meeting held at Brazilian Center for Research in Physics (CBPF). World Scientific Publishing Company, 2006. http://dx.doi.org/10.1142/9789812704030_0068.

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Liddle, Andrew R. "Inflation and the cosmic microwave background." In 3 K COSMOLOGY. ASCE, 1999. http://dx.doi.org/10.1063/1.59318.

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Gervasi, M., G. Boella, F. Cavaliere, et al. "Search for Cosmic Microwave Background polarization." In 3 K COSMOLOGY. ASCE, 1999. http://dx.doi.org/10.1063/1.59321.

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Wilkinson, D. T., and P. J. E. Peebles. "Discovery of the Cosmic Microwave Background." In Proceedings of Nobel Symposium 109. WORLD SCIENTIFIC, 2001. http://dx.doi.org/10.1142/9789812810434_0016.

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Górski, Krzysztof M. "Dark Matter–Cosmic microwave background connection." In Dark matter. AIP, 1995. http://dx.doi.org/10.1063/1.48377.

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Rapports d'organisations sur le sujet "Cosmic microwave background anomalies"

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Kogut, A. J. Spectral measurements of the cosmic microwave background. Office of Scientific and Technical Information (OSTI), 1989. http://dx.doi.org/10.2172/6018188.

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Fry, J. N., and Yun Wang. Cosmic microwave background anisotropies from plausible double inflation. Office of Scientific and Technical Information (OSTI), 1992. http://dx.doi.org/10.2172/10159054.

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Fry, J. N., and Yun Wang. Cosmic microwave background anisotropies from plausible double inflation. Office of Scientific and Technical Information (OSTI), 1992. http://dx.doi.org/10.2172/7235461.

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Lindesay, J. Cosmic Microwave Background Fluctuation Amplitude from Dark Energy De-Coherence. Office of Scientific and Technical Information (OSTI), 2004. http://dx.doi.org/10.2172/839978.

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Bensadoun, Marc John. Measurements of the cosmic microwave background temperature at 1.47 GHz. Office of Scientific and Technical Information (OSTI), 1991. http://dx.doi.org/10.2172/10183325.

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Baxter, Eric Jones. Detecting Gravitational Lensing of the Cosmic Microwave Background by Galaxy Clusters. Office of Scientific and Technical Information (OSTI), 2014. http://dx.doi.org/10.2172/1182549.

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Bensadoun, M. J. Measurements of the cosmic microwave background temperature at 1. 47 GHz. Office of Scientific and Technical Information (OSTI), 1991. http://dx.doi.org/10.2172/7030940.

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Levin, S. M. A measurement of the low frequency spectrum of the cosmic microwave background radiation. Office of Scientific and Technical Information (OSTI), 1987. http://dx.doi.org/10.2172/6463884.

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Rapetti, D. Constraining Dark Energy with X-ray Galaxy Clusters, Supernovae and the Cosmic Microwave Background. Office of Scientific and Technical Information (OSTI), 2005. http://dx.doi.org/10.2172/839859.

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Hill, James. Uncovering New Physics in the Cosmic Microwave Background: Developing Novel Theoretical Models and Machine-Learning-Powered Constraints. Office of Scientific and Technical Information (OSTI), 2023. http://dx.doi.org/10.2172/1997007.

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