Early Universe Cosmology And Dark Energy
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Early Universe Cosmology And Dark Energy
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Author : Elisa Gouvêa Mauricio Ferreira
language : en
Publisher:
Release Date : 2017
Early Universe Cosmology And Dark Energy written by Elisa Gouvêa Mauricio Ferreira and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017 with categories.
"In this thesis we address two of the most outstanding problems in cosmology: the singularity problem and the late acceleration of the universe. In the first part, we address the singularity problem that appears in the context of bouncing cosmologies, and suggest a formalism based on the AdS/CFT correspondence to track the evolution of cosmological perturbations in the presence of a space-like singularity that appears in a specific realization of a deformed AdS space-time. Our construction sets the formalism for the evolution of a scalar field and the curvature perturbations on a regularized field theory living in the boundary of this space-time and shows that their momentum dependence is preserved, while a finite particle production occurs. In the second part, we show two works that give a contribution to the huge effort to unravel the nature of dark energy. In those, we focus in testing a model of dark energy where an interaction with dark matter is allowed. This dynamical model has impacts on the evolution of the parameters that describe our universe and we test these using the latest cosmological observations. We use data from the Cosmic Microwave Background, Baryon Acoustic Oscillations (BAO) and type Ia supernovae, and find good agreement with observations, putting constraints in the cosmological parameters. We address the recently found deviation from LCDM in high-redshifts found in measurements of the BAO of the Lyman-alpha forest from quasars. We show that Hubble parameter and angular distance at high-z for the interacting model have a better concordance with the ones obtained by the BOSS collaboration than the LCDM model, and that adding this data set improves the global fit of the model, although with low statistical significance." --
The Physics Of The Early Universe
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Author : Eleftherios Papantonopoulos
language : en
Publisher: Springer Science & Business Media
Release Date : 2005-01-07
The Physics Of The Early Universe written by Eleftherios Papantonopoulos and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005-01-07 with Science categories.
The Physics of the Early Universe is an edited and expanded version of the lectures given at a recent summer school of the same name. Its aim is to present an advanced multi-authored textbook that meets the needs of both postgraduate students and young researchers interested in, or already working on, problems in cosmology and general relativity, with emphasis on the early universe. A particularly strong feature of the present work is the constructive-critical approach to the present mainstream theories, the careful assessment of some alternative approaches, and the overall balance between theoretical and observational considerations. As such, this book will also benefit experienced scientists and nonspecialists from related areas of research.
The Early Universe And Observational Cosmology
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Author : Nora Bretón
language : en
Publisher: Springer Science & Business Media
Release Date : 2004-05-14
The Early Universe And Observational Cosmology written by Nora Bretón and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2004-05-14 with Science categories.
Spectacular experimental advances in observational cosmology have helped raise cosmology to the status of a genuine science, and it is now possible to test many speculative theoretical issues and to obtain reliable values for the key parameters defining our observable universe. This book has emerged from selected lectures given at the Mexican School on Gravitation and Mathematical Physics by leaders in their field. Conceived as both a broad survey and as topical coverage of the latest developments, it will benefit graduate students and newcomers to this field and provide researchers in the field with a modern source of reference.
Cosmology And The Early Universe
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Author : Pasquale Di Bari
language : en
Publisher: CRC Press
Release Date : 2018-09-03
Cosmology And The Early Universe written by Pasquale Di Bari and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-09-03 with Science categories.
This book discusses cosmology from both an observational and a strong theoretical perspective. The first part focuses on gravitation, notably the expansion of the universe and determination of cosmological parameters, before moving onto the main emphasis of the book, the physics of the early universe, and the connections between cosmological models and particle physics. The book provides links with particle physics and with investigations of the theories beyond the Standard Model, especially in connection to dark matter and matter-antimatter asymmetry puzzles. Readers will gain a comprehensive account of cosmology and the latest observational results, without requiring prior knowledge of relativistic theories, making the text ideal for students. Features: Provides a self-contained discussion of modern cosmology results without requiring any prior knowledge of relativistic theories, enabling students to learn the first rudiments needed for a rigorous comprehension of cosmological concepts Contains a timely discussion of the latest cosmological results, including those from WMAP and the Planck satellite, and discuss the cosmological applications of the Nobel Prize 2017 awarded discovery of gravitational waves by the LIGO interferometer and the very high energy neutrinos discovered by the IceCube detector Includes original figures complementing mathematical derivations and accounting for the most important cosmological observations, in addition to a wide variety of problems with a full set of solutions discussed in detail in an accompanying solutions manual (available upon qualifying course adoption) To view the errata please visit the authors personal webpage.
Cosmological Clues
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Author : Carolyn Devereux
language : en
Publisher: CRC Press
Release Date : 2020-12-23
Cosmological Clues written by Carolyn Devereux and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2020-12-23 with Science categories.
Did the Universe have a beginning? Will it have an end? Or has it always been the same, never changing? This is the subject of cosmology; the study of the Universe, and this book provides a perfect introduction to the subject for anyone that is interested in the wonders of our Universe This book provides an accessible overview of the Standard Model of Cosmology, which is explained in six Cosmological Clues, including evidence for the Big Bang and dark matter and dark energy - the keystones of modern cosmology. It takes readers through some of the most exciting questions in cosmology, such as what evidence do we have that the Universe started from the Big Bang? Has dark matter been observed? Will we ever know what dark energy is? Are the multiverses real? And could the Universe be a hologram? This book is an ideal guide for anyone interested in finding out more about our Universe. It will be of interest to those studying cosmology for the first time, including readers without a scientific background, who have an interest in looking up at the stars and wondering where they all came from! Key features: Contains the latest evidence for the Big Bang, dark matter, and dark energy and explores exciting scientific ideas, such as inflation and multiverses Provides a clear explanation of the main theories of how the Universe evolved based on key observations - the Cosmological Clues Gives the reader a concise introduction to the scientific process, using cosmology as the example, and explores why it has been so successful in creating the technologies we have today
Introduction To The Theory Of The Early Universe Hot Big Bang Theory Second Edition
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Author : Rubakov Valery A
language : en
Publisher: World Scientific
Release Date : 2017-06-29
Introduction To The Theory Of The Early Universe Hot Big Bang Theory Second Edition written by Rubakov Valery A and has been published by World Scientific this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017-06-29 with Science categories.
This book is written from the viewpoint that a deep connection exists between cosmology and particle physics. It presents the results and ideas on both the homogeneous and isotropic Universe at the hot stage of its evolution and in later stages. The main chapters describe in a systematic and pedagogical way established facts and concepts on the early and the present Universe. The comprehensive treatment, hence, serves as a modern introduction to this rapidly developing field of science. To help in reading the chapters without having to constantly consult other texts, essential materials from General Relativity and the theory of elementary particles are collected in the appendices. Various hypotheses dealing with unsolved problems of cosmology, and often alternative to each other, are discussed at a more advanced level. These concern dark matter, dark energy, matter–antimatter asymmetry, etc. Particle physics and cosmology underwent rapid development between the first and the second editions of this book. In the second edition, many chapters and sections have been revised, and numerical values of particle physics and cosmological parameters have been updated.
Lectures On Cosmology
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Author : Georg Wolschin
language : en
Publisher: Springer
Release Date : 2010-03-10
Lectures On Cosmology written by Georg Wolschin and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2010-03-10 with Science categories.
The lectures that four authors present in this volume investigate core topics related to the accelerated expansion of the Universe. Accelerated expansion occured in the ?36 very early Universe – an exponential expansion in the in ationary period 10 s after the Big Bang. This well-established theoretical concept had rst been p- posed in 1980 by Alan Guth to account for the homogeneity and isotropy of the observable universe, and simultaneously by Alexei Starobinski, and has since then been developed by many authors in great theoretical detail. An accelerated expansion of the late Universe at redshifts z
The Early Universe
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Author : Edward Kolb
language : en
Publisher: CRC Press
Release Date : 2018-03-08
The Early Universe written by Edward Kolb and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-03-08 with Science categories.
The Early Universe has become the standard reference on forefront topics in cosmology, particularly to the early history of the Universe. Subjects covered include primordial nubleosynthesis, baryogenesis, phases transitions, inflation, dark matter, and galaxy formation, relics such as axions, neutrinos and monopoles, and speculations about the Universe at the Planck time. The book includes more than ninety figures as well as a five-page update discussing recent developments such as the COBE results.
Introduction To The Theory Of The Early Universe
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Author : Dmitry S. Gorbunov
language : en
Publisher: World Scientific
Release Date : 2011
Introduction To The Theory Of The Early Universe written by Dmitry S. Gorbunov and has been published by World Scientific this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011 with Science categories.
This book is written from the viewpoint of a deep connection between cosmology and particle physics. It presents the results and ideas on both the homogeneous and isotropic Universe at the hot stage of its evolution and in later stages. The main chapters describe in a systematic and pedagogical way established facts and concepts on the early and the present Universe. The comprehensive treatment, hence, serves as a modern introduction to this rapidly developing field of science. To help in reading the chapters without having to constantly consult other texts, essential materials from General Relativity and the theory of elementary particles are collected in the appendices. Various hypotheses dealing with unsolved problems of cosmology, and often alternative to each other, are discussed at a more advanced level. These concern dark matter, dark energy, matter-antimatter asymmetry, etc.
Dark Matter And Dark Energy
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Author : Brian Clegg
language : en
Publisher: Icon Books
Release Date : 2019-08-08
Dark Matter And Dark Energy written by Brian Clegg and has been published by Icon Books this book supported file pdf, txt, epub, kindle and other format this book has been release on 2019-08-08 with Science categories.
'Clear and compact ... It's hard to fault as a brief, easily digestible introduction to some of the biggest questions in the Universe' Giles Sparrow, BBC Four's The Sky at Night , Best astronomy and space books of 2019: 5/5 All the matter and light we can see in the universe makes up a trivial 5 per cent of everything. The rest is hidden. This could be the biggest puzzle that science has ever faced. Since the 1970s, astronomers have been aware that galaxies have far too little matter in them to account for the way they spin around: they should fly apart, but something concealed holds them together. That 'something' is dark matter - invisible material in five times the quantity of the familiar stuff of stars and planets. By the 1990s we also knew that the expansion of the universe was accelerating. Something, named dark energy, is pushing it to expand faster and faster. Across the universe, this requires enough energy that the equivalent mass would be nearly fourteen times greater than all the visible material in existence. Brian Clegg explains this major conundrum in modern science and looks at how scientists are beginning to find solutions to it.