The Intrinsic Bispectrum of the Cosmic Microwave Background
The Intrinsic Bispectrum of the Cosmic Microwave Background

Author: Guido Walter Pettinari

Publisher: Springer

Published: 2015-08-27

Total Pages: 281

ISBN-13: 3319218824

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Nominated as an outstanding thesis by Professor Robert Crittenden of the Institute of Cosmology and Gravitation in Portsmouth, and winner of the Michael Penston Prize for 2014 given by the Royal Astronomical Society for the best doctoral thesis in Astronomy or Astrophysics, this work aims to shed light on one of the most important probes of the early Universe: the bispectrum of the cosmic microwave background. The CMB bispectrum is a potential window on exciting new physics, as it is sensitive to the non-Gaussian features in the primordial fluctuations, the same fluctuations that evolved into today’s planets, stars and galaxies. However, this invaluable information is potentially screened, as not all of the observed non-Gaussianity is of primordial origin. Indeed, a bispectrum arises even for perfectly Gaussian initial conditions due to non-linear dynamics, such as CMB photons scattering off free electrons and propagating in an inhomogeneous Universe. Dr. Pettinari introduces the reader to this intrinsic bispectrum in a pedagogic way, building up from the standard model of cosmology and from cosmological perturbation theory, the tool cosmologists use to unravel the history of the cosmos. In doing so, he introduces SONG, a new and efficient code for solving the second-order Einstein and Boltzmann equations. Next, he moves on to answer the crucial question: is the intrinsic bispectrum going to screen the primordial signal in the CMB? Using SONG, he computes the intrinsic bispectrum and shows how its contamination leads to a small bias in the estimates of primordial non-Gaussianity, a great news for the prospect of using CMB data to probe primordial non-Gaussianity.

The Cosmic Microwave Background
The Cosmic Microwave Background

Author: Júlio C. Fabris

Publisher: Springer

Published: 2016-10-07

Total Pages: 367

ISBN-13: 3319447696

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The series of texts composing this book is based on the lectures presented during the II José Plínio Baptista School of Cosmology, held in Pedra Azul (Espírito Santo, Brazil) between 9 and 14 March 2014. This II JBPCosmo has been entirely devoted to the problem of understanding theoretical and observational aspects of Cosmic Background Radiation (CMB).The CMB is one of the most important phenomena in Physics and a fundamental probe of our Universe when it was only 400,000 years old. It is an extraordinary laboratory where we can learn from particle physics to cosmology; its discovery in 1965 has been a landmark event in the history of physics.The observations of the anisotropy of the cosmic microwave background radiation through the satellites COBE, WMAP and Planck provided a huge amount of data which are being analyzed in order to discover important informations regarding the composition of our universe and the process of structure formation.

Tetrad Formalism for Exact Cosmological Observables
Tetrad Formalism for Exact Cosmological Observables

Author: Ermis Mitsou

Publisher: Springer Nature

Published: 2020-06-25

Total Pages: 144

ISBN-13: 303050039X

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This book presents a novel mathematical formalism, based on the tetrad formulation of differential geometry, for describing cosmological observables exactly and conveniently. It covers all the standard observables, i.e. distances, weak lensing, number counts and cosmic microwave background, and also includes a detailed derivation of general-relativistic matrix kinetic theory. All the fully nonlinear equations are derived in detail and the mathematical content is self-contained, so that readers require only a basic knowledge of general relativity. Moreover, the authors discuss several subtle issues that are usually overlooked in the literature and, in particular, issues that distinguish this formalism from the more approximative standard practice.

The Vector Mode in the Second-order Cosmological Perturbation Theory
The Vector Mode in the Second-order Cosmological Perturbation Theory

Author: Shohei Saga

Publisher: Springer

Published: 2018-01-11

Total Pages: 143

ISBN-13: 9811080070

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This thesis sheds valuable new light on the second-order cosmological perturbation theory, extensively discussing it in the context of cosmic microwave background (CMB) fluctuations. It explores the observational consequences of the second-order vector mode, and addresses magnetic field generation and the weak lensing signatures, which are key phenomena of the vector mode. The author demonstrates that the second-order vector mode, which never appears at the linear-order level, naturally arises from the non-linear coupling of the first-order scalar modes. This leads to the remarkable statement that the vector-order mode clearly contributes to the generation of cosmological magnetic fields. Moreover, the weak lensing observations are shown to be accessible to the vector mode. On the basis of ongoing and forthcoming observations, the thesis concludes that the second-order vector mode is detectable.

Searches for the Supersymmetric Partner of the Top Quark, Dark Matter and Dark Energy at the ATLAS Experiment
Searches for the Supersymmetric Partner of the Top Quark, Dark Matter and Dark Energy at the ATLAS Experiment

Author: Nicolas Maximilian Köhler

Publisher: Springer Nature

Published: 2019-09-13

Total Pages: 264

ISBN-13: 3030259889

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Astrophysical observations implying the existence of Dark Matter and Dark Energy, which are not described by the Standard Model (SM) of particle physics, have led to extensions of the SM predicting new particles that could be directly produced at the Large Hadron Collider (LHC) at CERN. Based on 2015 and 2016 ATLAS proton-proton collision data, this thesis presents searches for the supersymmetric partner of the top quark, for Dark Matter, and for DarkEnergy, in signatures with jets and missing transverse energy. Muon detection is key to some of the most important LHC physics results, including the discovery of the Higgs boson and the measurement of its properties. The efficiency with which muons can be detected with the ATLAS detector is measured using Z boson decays. The performance of high-precision Monitored Drift Tube muon chambers under background rates similar to the ones expected for the High Luminosity-LHC is studied.

The Tao of Cosmos
The Tao of Cosmos

Author: Zhen G. Ma

Publisher: Simon and Schuster

Published: 2024-07-23

Total Pages: 331

ISBN-13: 1644117770

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• Connects the philosophy of the I Ching with key recent advances in cosmology, such as the Big Bang theory, Roger Penrose's cyclic conformal cosmology, and his and Stuart Hameroff's cosmic quantum brain dynamics • Explains the Taoist cosmology of Heaven-Humanity Oneness in the context of Teilhard de Chardin’s evolutionism, Thomas Berry’s cosmogenetic trinity, and Brian Swimme’s 12 cosmological powers • Examines the holographic unity of Heaven, Earth, and Humankind at microcosmic, mesocosmic, and macrocosmic scales Is the universe inert and empty, or is it in some way responsive to consciousness? Breathing new life into a question that has perplexed philosophers since ancient times and scientists for the last century, physicist Zhen G. Ma, Ph.D., offers a quantitative “theory of everything” that beautifully integrates ancient I Ching philosophy, Eastern Taoism, modern cosmology, and the quantum brain dynamics of consciousness. Sharing insights from his years of research on space physics and black-hole spacetime—complemented by studies in quantum brain dynamics and cosmological powers with Brian Swimme at the California Institute of Integral Studies—Ma explains how his integrated theory draws primarily on two key paradigms in the philosophy of cosmology and consciousness: Swimme’s cosmic creation story of the universe as a green dragon and Roger Penrose and Stuart Hameroff’s cosmic consciousness. Extending these theories further, Ma shows how they harmonize not only with the ancient Eastern philosophy of the oneness of heaven and humanity, but also with a holographic cosmic principle that connects the quantum-plasma brain with the universe and earth with heaven. He then looks at this holographic unity in the cyclic process of birth, growth, decay, and death and shows how it resonates with Einstein-Friedmann’s cosmological dynamics and Hawking-Penrose’s quantum gravity model. Demonstrating a quantitative paradigm of everything, Ma shows how humanity is inextricably and holistically blended into the cosmic fabric of the universe.

Data Analysis in Cosmology
Data Analysis in Cosmology

Author: Vicent J. Martinez

Publisher: Springer Science & Business Media

Published: 2009-03-15

Total Pages: 636

ISBN-13: 3540239723

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The amount of cosmological data has dramatically increased in the past decades due to an unprecedented development of telescopes, detectors and satellites. Efficiently handling and analysing new data of the order of terabytes per day requires not only computer power to be processed but also the development of sophisticated algorithms and pipelines. Aiming at students and researchers the lecture notes in this volume explain in pedagogical manner the best techniques used to extract information from cosmological data, as well as reliable methods that should help us improve our view of the universe.

The Cosmic Microwave Background
The Cosmic Microwave Background

Author: C.H. Lineweaver

Publisher: Springer

Published: 2011-09-20

Total Pages: 449

ISBN-13: 9789401065122

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Proceedings of the NATO Advanced Study Institute on the Cosmological Background Radiation, Strasbourg, France, May 27-June 7, 1996

The Primordial Density Perturbation
The Primordial Density Perturbation

Author: David H. Lyth

Publisher: Cambridge University Press

Published: 2009-06-11

Total Pages: 516

ISBN-13: 052182849X

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The origin and evolution of the primordial perturbation is key to understanding structure formation in the earliest stages of the Universe. Giving a thorough account of theoretical cosmology and perturbations in the early Universe, this graduate-level textbook describes their observational consequences and how such observations relate to primordial physical processes.

Modern Cosmology
Modern Cosmology

Author: Scott Dodelson

Publisher: Academic Press

Published: 2003-03-13

Total Pages: 462

ISBN-13: 0122191412

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An advanced text for senior undergraduates, graduate students and physical scientists in fields outside cosmology. This is a self-contained book focusing on the linear theory of the evolution of density perturbations in the universe, and the anisotropiesin the cosmic microwave background.