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Thèses sur le sujet « Cosmic microwave background anomalies »

Auteur : Grafiati

Publié le 7 juin 2025

Mis à jour le 2 août 2025

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1

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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2

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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3

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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4

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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5

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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6

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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7

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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8

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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9

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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10

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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11

Hansen, Frode Kristian. "Data Analysis of the Cosmic Microwave Background." Diss., lmu, 2002. http://nbn-resolving.de/urn:nbn:de:bvb:19-3131.

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12

Chluba, Jens. "Spectral Distortions of the Cosmic Microwave Background." Diss., lmu, 2005. http://nbn-resolving.de/urn:nbn:de:bvb:19-40639.

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13

Castro, PatriÌcia Guiod de. "The statistics of the cosmic microwave background." Thesis, University of Oxford, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.400070.

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14

Buttz, Catalina M. (Catalina Marie). "Cosmic microwave background predictions of supernatural inflation." Thesis, Massachusetts Institute of Technology, 2001. http://hdl.handle.net/1721.1/32722.

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Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Physics, June 2004.<br>Includes bibliographical references (leaves 47-49).<br>This thesis makes predictions for the temperature anisotropy spectrum of the CMB under the supernatural inflation model class [17] and compares these predictions against the Boomerang 98 data [5], using the Lange et. al [11] cosmological parameter estimations for an [Omega]tot = 1 universe. This was implemented by creating a modified version of CMBFAST [19] which could accommodate a two-field inflation model. A series of codes were compiled, both with and

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15

Smith, Sarah Jane. "Non-Gaussianity in the cosmic microwave background." Thesis, University of Cambridge, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.613775.

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16

Hamimeche, Samira. "Likelihood analysis of the cosmic microwave background." Thesis, University of Cambridge, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.611510.

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17

Chon, Gayoung. "Theoretical studies of the cosmic microwave background." Thesis, University of Cambridge, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.615672.

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18

Bowyer, Jude William. "Local methods for the cosmic microwave background." Thesis, Imperial College London, 2011. http://hdl.handle.net/10044/1/9072.

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The standard tools for analyzing the Cosmic Microwave Background (CMB), a key component for making cosmological inferences, are usually of global sampling type. Such a methodological bias may preclude the development of important techniques for cosmology. This thesis develops local, real-space tools for CMB analysis which may be complemented using harmonic space techniques or provide useful signal diagnostics on their own. Particularly, finite-difference schemes for performing local derivatives are investigated. One can define derivatives which extract the primordial polarization modes from th

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19

Tashiro, Hiroyuki. "Primordial magnetic fields and cosmic microwave background." 京都大学 (Kyoto University), 2006. http://hdl.handle.net/2433/144173.

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Kyoto University (京都大学)<br>0048<br>新制・課程博士<br>博士(理学)<br>甲第12090号<br>理博第2984号<br>新制||理||1445(附属図書館)<br>23926<br>UT51-2006-J85<br>京都大学大学院理学研究科物理学・宇宙物理学専攻<br>(主査)教授中村卓史, 教授畑浩之, 助教授田中貴浩<br>学位規則第4条第1項該当

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20

Gupta, Sujata. "Tests and predictions of the cosmic microwave background." Thesis, University of Edinburgh, 2002. http://hdl.handle.net/1842/28170.

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The Hot Big Bang model does not predict perturbations in the matter distribution of our Universe. The origin of the large scale structure, such as planets, stars and galaxies is not known. Further, we do not know how big the Universe is, how old, or what its main constituents are. There are a group of early Universe models which predict primordial fluctuations in the Universe, and using the most popular of these, 'inflation', the preliminary results of precision cosmology are giving the first glimpse of values for these mysterious quantities. The cosmic microwave background radiation gives us

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21

Pettinari, Guido Walter. "The intrinsic bispectrum of the Cosmic Microwave Background." Thesis, University of Portsmouth, 2013. https://researchportal.port.ac.uk/portal/en/theses/the-intrinsic-bispectrum-of-the-cosmic-microwave-background(ce62a4e8-625f-4c84-9e0c-821df12cba10).html.

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Cosmology, intended as the study of the origin and evolution of the Universe and its components, has advanced from being a philosophical discipline to a data-driven science. Much of this progress was achieved in the last few decades thanks to the wealth of cosmological data from Earth and space-based experiments. The abundance of observational constraints has considerably narrowed the space for theoretical speculation, to the point that now most of the cosmological community agrees on a standard model of cosmology. A crucial assumption of this model is that the structure observed in the Univer

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22

Stewart, Andrew. "Constraining cosmological parameters with the cosmic microwave background." Thesis, McGill University, 2009. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=32380.

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We investigate the constraints which can by applied on two different cosmological parameters using observations of the cosmic microwave background (CMB). First, we develop a method of constraining the cosmic string tension, $G\mu$, which uses the Canny edge detection algorithm as a means of searching CMB temperature maps for the signature of the Kaiser-Stebbins effect. We test the potential of this method using high resolution, simulated CMB temperature maps. By imitating the future output from the South

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23

Nazer, Mohammad Ahsan. "Cosmic microwave background anisotropies in an inhomogeneous universe." Thesis, University of Canterbury. Physics and Astronomy, 2015. http://hdl.handle.net/10092/10199.

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The timescape cosmology represents a potentially viable alternative to the standard homogeneous and isotropic Friedmann--Lemaître--Robertson--Walker (FLRW) cosmology, without the need for dark energy. This thesis first extends the previous work on the timescape cosmology to include a radiation component in the evolution equations for the timescape cosmology and tests of the timescape model are then performed against the Cosmic Microwave Background (CMB) temperature anisotropies from the Planck satellite. Although average cosmic evolution in the timescape scenario only differs substantial

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24

Dineen, Patrick. "Peculiar features in the cosmic microwave background radiation." Thesis, University of Nottingham, 2005. http://eprints.nottingham.ac.uk/10133/.

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In this thesis, I develop statistics capable of detecting peculiar features in current observations of the cosmic microwave background (CMB) radiation. Such tools scrutinise the very foundations of standard cosmological models. Evidence of peculiar features in the CMB may require a reassessment of these building blocks. More likely, any features may be artefacts of some non-cosmological signal. Nevertheless, whether the origin of these strange attributes is primordial or local, their discovery would be instructive. Existing statistical tools focus on the amplitude of the spherical harmonic coe

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25

Leach, Samuel. "Precision inflationary perturbations and cosmic microwave background constraints." Thesis, University of Sussex, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.249114.

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26

Hancock, Stephen. "Detections of structure in the cosmic microwave background." Thesis, University of Cambridge, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.338307.

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27

Mukherjee, Pia. "Improved analysis methods for cosmic microwave background data." Thesis, University of Cambridge, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.620932.

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28

Osborne, Joshua C. P. "Eigenspectra for Correlating Cosmic Microwave Background Temperature Data." Case Western Reserve University School of Graduate Studies / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=case1544180098307733.

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29

Chiang, Hsin Cynthia Lange Andrew E. Lange Andrew E. "Observation of cosmic microwave background polarization with BICEP /." Diss., Pasadena, Calif. : California Institute of Technology, 2009. http://resolver.caltech.edu/CaltechETD:etd-10052008-101916.

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30

Billi, Matteo <1992&gt. "Non-standard signatures from Cosmic Microwave Background polarisation." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2022. http://amsdottorato.unibo.it/10226/1/Billi_Matteo_tesi.pdf.

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In this Thesis we focus on non-standard signatures from CMB polarisation, which might hint at the existence of new phenomena beyond the standard models for Cosmology and Particle physics. With the Planck ESA mission, CMB temperature anisotropies have been observed at the cosmic variance limit, but polarisation remains to be further investigated. CMB polarisation data are important not only because they contribute to provide tighter constraints of cosmological parameters but also because they allow the investigation of physical processes that would be precluded if just the CMB temperature maps

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31

Salton, Grant. "The power spectrum of cosmic microwave background polarization from cosmic string wakes." Thesis, McGill University, 2014. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=121559.

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We compute the integrated Sachs--Wolfe type contribution to the CMB polarization power spectrum from cosmic string wakes. An introduction to topological defects, cosmic strings, CMB polarization, and spin-s fields is given. We then use these tools to compute the angular power spectrum of E- and B-mode polarization due to cosmic string wakes, in the flat sky limit. We find that cross-correlation terms (i.e., EB, ET, BT) vanish, while the EE and BB power spectra are equal in shape and magnitude. This result is in stark contrast with B-mode polarization from Gaussian fluctuations, which vanishes

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32

Sievers, Jonathan LeRoy Steidel Charles C. "Data analysis of and results from observations of the cosmic microwave background with the Cosmic Background Imager /." Diss., Pasadena, Calif. : California Institute of Technology, 2004. http://resolver.caltech.edu/CaltechETD:etd-05282004-140350.

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33

Gold, Benjamin Mark. "Cosmic acceleration and the theory of the microwave background /." For electronic version search Digital dissertations database. Restricted to UC campuses. Access is free to UC campus dissertations, 2005. http://uclibs.org/PID/11984.

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34

Frommert, Mona Silja. "Temperature and Polarization Studies of the Cosmic Microwave Background." Diss., lmu, 2010. http://nbn-resolving.de/urn:nbn:de:bvb:19-112632.

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35

Su, Shi Chun. "Post-inflationary non-Gaussianities on the cosmic microwave background." Thesis, University of Cambridge, 2015. https://www.repository.cam.ac.uk/handle/1810/249054.

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The cosmic microwave background (CMB) provides unprecedented details about the history of our universe and helps to establish the standard model in modern cosmology. With the ongoing and future CMB observations, higher precision can be achieved and novel windows will be opened for studying different phenomena. Non-Gaussianity is one of the most exciting effects which fascinate many cosmologists. While numerous alternative inflationary models predict detectable primordial non-Gaussianities generated during inflation, the single-field slow-roll inflation of the standard model is known to produce

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36

Roebber, Elinore. "Large-scale secondary polarization of the cosmic microwave background." Thesis, McGill University, 2012. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=110739.

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We present two examples of secondary effects on the large-scale polarization of the cosmic microwave background (CMB). We begin with a review of the standard model of cosmology, as well as the predictions of bulk flows by the linear theory of structure growth and the mathematical formalism of polarization. Following this review, we explore the impact of the epoch of reionization on the large-scale polarization of the CMB, paying particular attention to the effects of an alternate reionization history containing dark stars. Subsequently, we derive the CMB polarization signature of large-scale b

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37

Dudley, Jonathan 1982. "Small-scale secondary anisotropies in the Cosmic Microwave Background." Thesis, McGill University, 2008. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=112618.

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One of the main harbingers of the modern age of precision cosmology, the Cosmic Microwave Background (CMB) has proven itself to be a veritable trove of cosmological information. With the aid of experiments such as the WMAP satellite, precision measurements of the CMB anisotropy spectra are now being made.<br>This work will first explore the physics of the Vishniac effect, a small-scale CMB temperature anisotropy created by the Compton scattering of CMB photons by free electrons caught in a line-of-sight bulk flow. The Vishniac effect arises due to a density enhancement in the electrons caused

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38

Maisinger, Klaus Stefan. "Methods for analysing observations of the cosmic microwave background." Thesis, University of Cambridge, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.620637.

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39

FORASTIERI, Francesco. "Probing the neutrino sector through Cosmic Microwave Background observations." Doctoral thesis, Università degli studi di Ferrara, 2018. http://hdl.handle.net/11392/2488088.

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Le interazioni tra neutrini oltre il modello standard della fisica delle particelle sono un campo aperto sia dal punto di vista teorico che sperimentale. In questa tesi presentiamo come le proprietà non standard dei neutrini possano essere vincolate usando le osservazioni cosmologiche e in particolare i dati della radiazione di fondo cosmica, come i dati di Planck. Considereremo la possibilità che i neutrini posseggano interazioni segrete scalari o pseudoscalari mediate da un bosone Nambu-Goldstone di una simmetria globale spontaneamente rotta U (1) ancora sconosciuta, come ad esempio i modell

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40

Inoue, Taro. "Exploring Topology of the Universe in the Cosmic Microwave Background." 京都大学 (Kyoto University), 2001. http://hdl.handle.net/2433/150817.

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Kyoto University (京都大学)<br>0048<br>新制・課程博士<br>博士(理学)<br>甲第8713号<br>理博第2285号<br>新制||理||1199(附属図書館)<br>UT51-2001-F43<br>京都大学大学院理学研究科物理学・宇宙物理学専攻<br>(主査)教授冨田憲二, 教授九後太一, 教授小玉英雄, 教授中村卓史, 助教授田中貴浩<br>学位規則第4条第1項該当

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41

Vansyngel, Flavien. "The blind Bayesian approach to Cosmic Microwave Background data analysis." Thesis, Paris 6, 2014. http://www.theses.fr/2014PA066609/document.

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Le thème principal de cette thèse est l'analyse de données du fond diffus cosmologique (CMB). En particulier, je présente une méthode, Bayesian Independent Analysis (BICA), qui effectue à la fois la séparation des composants et l'inférence du spectre de puissance du CMB. Je commence par présenter les principes de base du CMB et souligne la nécessité d'une modélisation robuste des erreurs au niveau de la carte. Puis je présente la principale source d'erreurs dans les produits du CMB, à savoir les avant-plans. La séparation des composants est une étape cruciale dans l'analyse de données de CMB.

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42

Jones, A. W. "Application of novel analysis techniques to cosmic microwave background astronomy." Thesis, University of Cambridge, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.605683.

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The data from Cosmic Microwave Background (CMB) experiments are becoming more complex with each new experiment. A consistent way of analysing these data sets is required so that direct comparison is possible between the various experimental results. This thesis presents several techniques that can be used to analyse CMB data. A summary of the processes involved in the formation of the fluctuations and the resultant radiation we expect to see in our sky maps is presented. This includes both the CMB and other emission components that operate at the frequencies covered by CMB experiments. These o

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43

Grivell, Ian J. "Inflationary perturbations : from quantum fluctuations to cosmic microwave background anisotropies." Thesis, University of Sussex, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.298729.

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44

Bevis, Neil Andrew. "Constraints on topological defects using the cosmic microwave background radiation." Thesis, University of Sussex, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.424400.

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45

Puchalla, Jason Lee. "Measuring cosmic microwave background radiation anisotropy on medium angular scales." Thesis, Massachusetts Institute of Technology, 1995. http://hdl.handle.net/1721.1/36965.

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46

Scaife, Anna Margaret Mahala. "Observing the cosmic microwave background with the Very Small Array." Thesis, University of Cambridge, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.613275.

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47

Bessada, Dennis Fernandes Alves. "Studying signatures of alternative cosmologies in the cosmic microwave background." Instituto Nacional de Pesquisas Espaciais, 2010. http://urlib.net/sid.inpe.br/mtc-m19@80/2010/02.03.11.00.

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In the present thesis we study the signatures of four alternative cosmological models in the Cosmic Microwave Background: Massive Gravity, the Modified Fierz-Pauli model (MFP), DBI inflation and Tachyacoustic Cosmology. The first two models are studied as alternatives to the Friedmann-Robertson- Walker cosmology, and we showed that both models lead to the same results for tensor perturbations, whereas for vector modes the MFP model leads to non-decaying amplitudes, unlike Massive Gravity and General Relativity (GR), where such modes are washed out by the expansion of the universe. We calculate

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48

Wang, Lingfei. "Spectator fields and their imprints on the Cosmic Microwave Background." Thesis, Lancaster University, 2016. http://eprints.lancs.ac.uk/83591/.

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When a subdominant light scalar field ends slow roll during inflation, but well after the Hubble exit of the pivot scales, it may determine the cosmological perturbations. This thesis investigates how such a scalar field, the spectator, may leave its impact on the Cosmic Microwave Background (CMB) radiation and be consequently constrained. We first introduce the observables of the CMB, namely the power spectrum Pζ , spectral index ns and its running dns/d ln k, the non-Gaussianities fNL, gNL and τNL, and the lack of isocurvature and polarization modes. Based on these studies, we derive the cos

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49

Bryan, Sean Alan. "Half-wave Plates for the Spider Cosmic Microwave Background Polarimeter." Case Western Reserve University School of Graduate Studies / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=case1392115856.

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50

Sayers, Jack Golwala Sunil Golwala Sunil. "A search for cosmic microwave background anisotropies on arcminute scales /." Diss., Pasadena, Calif. : California Institute of Technology, 2008. http://resolver.caltech.edu/CaltechETD:etd-12232007-013248.

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