Download or read book Observational Tests of Cosmological Inflation written by T. Shanks and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 472 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book represents the proceedings from the NATO sponsored Advanced Research Workshop entitled "Observational Tests of Inflation" held at the University of Durham, England on the 10th-14th December, 1990. In recent years, the cosmological inflation model has drawn together the worlds of particle physics, theoretical cosmology and observational astronomy. The aim of the workshop was to bring together experts in all of these fields to discuss the current status of the inflation theory and its observational predictions. The simplest inflation model makes clear predictions which are testable by astronomical observation. Foremost is the prediction that the cosmological density parameter, no, should have a value negligibly different from the critical, Einstein-de Sitter value of 00=1. The other main prediction is that the spectrum of primordial density fluctuations should be Gaussian and take the Harrison-Zeldovich form. The prediction that n =l, in patticular, leads to several important consequences o for cosmology. Firstly, there is the apparent contradiction with the limits on baryon density from Big Bang nucleosynthesis which has led to the common conjecture that weakly interacting particles rather than baryons may form the dominant mass constituent of the Universe. Secondly, with n =l, the age of the Universe is uncomfortably short if o the Hubble constant and the ages of the oldest star clusters lie within their currently believed limits.
Download or read book An Introduction to the Science of Cosmology written by Derek Raine and published by CRC Press. This book was released on 2018-10-03 with total page 232 pages. Available in PDF, EPUB and Kindle. Book excerpt: A thorough introduction to modern ideas on cosmology and on the physical basis of the general theory of relativity, An Introduction to the Science of Cosmology explores various theories and ideas in big bang cosmology, providing insight into current problems. Assuming no previous knowledge of astronomy or cosmology, this book takes you beyond introductory texts to the point where you are able to read and appreciate the scientific literature, which is broadly referenced in the book. The authors present the standard big bang theory of the universe and provide an introduction to current inflationary cosmology, emphasizing the underlying physics without excessive technical detail. The book treats cosmological models without reliance on prior knowledge of general relativity, the necessary physics being introduced in the text as required. It also covers recent observational evidence pointing to an accelerating expansion of the universe. The first several chapters provide an introduction to the topics discussed later in the book. The next few chapters introduce relativistic cosmology and the classic observational tests. One chapter gives the main results of the hot big bang theory. Next, the book presents the inflationary model and discusses the problem of the origin of structure and the correspondingly more detailed tests of relativistic models. Finally, the book considers some general issues raised by expansion and isotropy. A reference section completes the work by listing essential formulae, symbols, and physical constants. Beyond the level of many elementary books on cosmology, An Introduction to the Science of Cosmology encompasses numerous recent developments and ideas in the area. It provides more detailed coverage than many other titles available, and the inclusion of problems at the end of each chapter aids in self study and makes the book suitable for taught courses.
Download or read book Observing Brane Inflation In The Sky written by Jiajun Xu and published by . This book was released on 2010 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Brane inflation is a natural cosmic inflation scenario from string theory. Explicitly constructed brane inflation models enable us to probe string theory using cosmological data. This is an exciting area where observations make contact with fundamental physics at or around the string scale. In this work, I review the basic setup of warped brane inflation models, discuss how novel kinetic term, the Dirac-Born-Infeld (DBI) action, naturally arises and what inflaton potential string theory gives us. Depending on the magnitude of the inflaton mass relative to the Hubble scales, there are three different scenarios: the slow-roll scenario, the Ultraviolet DBI scenario, and the Infrared DBI scenario. I will review each scenario in detail, and discuss their predictions on the cosmic microwave background (CMB) sky. Some predictions, such as primordial non-Gaussianities, are so distinctive, that if detected in the foreseeable future, will reveal the nature of cosmic inflation in great detail. In fact, as we will show, current observational bounds on non-Gaussianity is already powerful enough to rule out Ultraviolet DBI inflation in the relativistic regime. Some predictions have very stringy natures. Such as the stringy phase transition during the early stage of Infrared DBI inflation that leads to significant running of the spectral index, and the sharp features in the warp factor as a gravity dual of Sieberg duality cascade. All these observable features opens the door for cosmological observations to test the nature of the theory. In this work, we will present cosmological data analysis which constrain specific brane inflation models in great detail. Aside from the observational prospects, we will also discuss the conceptual issue of eternal inflation in brane inflation scenarios. It is generically believed that eternal inflation is unavoidable in field theory inflation models; however, string theory offers new insights. As we will show, a bound on the inflaton field range from the size of the compactified manifold forbids stochastic eternal inflation in the slow-roll scenario. Eternal inflation in the DBI scenarios are also not generic, either due to the relativistic motion of the brane or due to the stringy phase transition at the tip of the throat. The last chapter of the work discuss our recent efforts in building inflation models on the string landscape. It is now widely accepted that string theory allows an enormous number of vacua. In the early universe, if the inflaton field is mobile in the landscape, the resulting cosmic inflation picture is quite different from usual points of view. Here we expect a multi-dimensional inflaton potential with random features. Such randomness in the potential causes the inflaton to undergo Brownian-like motion; the detours always increase the number of e-folds, ameliorating the fine tuning of a flat potential in slowroll model building. Meanwhile, detours lead to fluctuations in the primordial power spectrum, which could show up in the CMB power spectrum. If we are fortunate, the PLANCK satellite will be able to reveal some of these features for us. We will conclude this work with summaries and remarks on future research.
Download or read book SUSY 95 written by I. Antoniadis and published by Atlantica Séguier Frontières. This book was released on 1996 with total page 646 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Physics Briefs written by and published by . This book was released on 1992 with total page 1416 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Principles of Physical Cosmology written by P. J. E. Peebles and published by Princeton University Press. This book was released on 2020-09-15 with total page 750 pages. Available in PDF, EPUB and Kindle. Book excerpt: The classic introduction to physical cosmology from Nobel Prize–winning physicist P. J. E. Peebles Principles of Physical Cosmology is the essential introduction to this critical area of modern physics, written by a leading pioneer who has shaped the course of the field for decades. P. J. E. Peebles provides an authoritative overview of the field, showing how observation has combined with theory to establish the science of physical cosmology. He presents the elements of physical cosmology, including the history of the discovery of the expanding universe; surveys the cosmological tests that measure the geometry of space-time, with a discussion of general relativity as the basis for these tests; and reviews the origin of galaxies and the large-scale structure of the universe. Now featuring Peebles's 2019 Nobel lecture, Principles of Physical Cosmology remains an indispensable reference for students and researchers alike.
Download or read book Principles of Physical Cosmology written by Phillip James Edwin Peebles and published by Princeton University Press. This book was released on 1993-05-09 with total page 742 pages. Available in PDF, EPUB and Kindle. Book excerpt: The first part of the work presents the elements of physical cosmology, including the history of the discovery of the expanding universe. The second part, on the cosmological tests that measure the geometry of spacetime, discusses general relativity theory as the basis for the tests, and then surveys the broad variety of ways the tests can be applied with the new generations of telescopes and detectors. The third part deals with the origin of galaxies and the large-scale structure of the universe, and reviews ideas about how the evolution of the universe might be traced back to very early epochs when structure originated. Each chapter begins with an introduction that can be understood with no special knowledge beyond undergraduate physics, and then progresses to more specialized topics.
Download or read book Current Topics In Astrofundamental Physics Proceedings Of The 2nd Course In The International School Of Astrophysics D Chalonge written by Normalized Sanchez and published by World Scientific. This book was released on 1993-08-27 with total page 646 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides an updated understanding of the progress and current problems in the interplay between fundamental physics, astrophysics and cosmology.
Download or read book Modern Cosmology written by Scott Dodelson and published by Academic Press. This book was released on 2003-03-13 with total page 462 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book Optics in Astronomy written by J. V. Wall and published by Cambridge University Press. This book was released on 1993-07-15 with total page 304 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ground-based optical astronomy is undergoing a renaissance inspired by recent technological advances. This book collects contributions from expert international designers and observers which show the fundamental role of innovative optical design in modern astrophysics and cosmological research. The papers are based on those presented at a conference held at the Royal Greenwich Observatory, Cambridge, in September 1991 in celebration of Professor C. G. Wynne. New and future telescopes, instruments, spectrographs and detector-systems are described in the context of the research problems at which they are targeted. This book is an essential reference for both state-of-the-art instrumentation and future design.
Download or read book Cosmology written by Dierck-Ekkehard Liebscher and published by Springer Science & Business Media. This book was released on 2005-04-20 with total page 322 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cosmology deals with the current state of thinking about the basic questions at the center of the field of cosmology. More emphasis than usual is put on the connections to related domains of science, such as geometry, relativity, thermodynamics, particle physics, and - in particular - on the intrinsic connections between the different topics. The chapters are illustrated with many figures that are as exact as currently possible, e.g. in the case of geometry and relativity. Readers acquire a graduate-level knowledge of cosmology as it is required to understand the cosmological impact of their particular research topics, as well as an introduction into the current research in the field.
Download or read book New Quests in Stellar Astrophysics The Link Between Stars and Cosmology written by Miguel Chávez and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 319 pages. Available in PDF, EPUB and Kindle. Book excerpt: Stellar astrophysics still provides the basic framework for deciphering the imprints left over by the evolving universe on all scales. Advances or shortcomings in the former field have direct consequences in our ability to understand the global properties of the latter. This volume contains the most recent updates on a variety of topics that, though independent by themselves, are inevitably connected on a cosmological scale. These include comprehensive articles by leaders in fields extending from stellar atmospheres through properties of the stellar component in the Milky Way up to the stellar environment in high redshift galaxies. The wide coverage of astrophysical themes makes this volume very valuable for researchers and Ph.D. students in astrophysics.
Download or read book One Hundred Years Of General Relativity From Genesis And Empirical Foundations To Gravitational Waves Cosmology And Quantum Gravity Volume 2 written by Wei-tou Ni and published by World Scientific. This book was released on 2017-05-26 with total page 636 pages. Available in PDF, EPUB and Kindle. Book excerpt: The aim of this two-volume title is to give a comprehensive review of one hundred years of development of general relativity and its scientific influences. This unique title provides a broad introduction and review to the fascinating and profound subject of general relativity, its historical development, its important theoretical consequences, gravitational wave detection and applications to astrophysics and cosmology. The series focuses on five aspects of the theory: The first three topics are covered in Volume 1 and the remaining two are covered in Volume 2. While this is a two-volume title, it is designed so that each volume can be a standalone reference volume for the related topic.
Download or read book Non minimal Higgs Inflation and Frame Dependence in Cosmology written by Christian Friedrich Steinwachs and published by Springer Science & Business Media. This book was released on 2013-10-30 with total page 286 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis explores the idea that the Higgs boson of the Standard Model and the cosmological inflation are just two manifestations of one and the same scalar field - the Higgs-inflation. By this unification two energy scales that are separated by many orders of magnitude are connected, thereby building a bridge between particle physics and cosmology. An essential ingredient for making this model consistent with observational data is a strong non-minimal coupling to gravity. Predictions for the value of the Higgs mass as well as for cosmological parameters are derived, and can be tested by future experiments. The results become especially exciting in the light of the recently announced discovery of the Higgs boson. The model of non-minimal Higgs inflation is also used in a quantum cosmological context to predict initial conditions for inflation. These results can in turn be tested by the detection of primordial gravitational waves. The presentation includes all introductory material about cosmology and the Standard Model that is essential for the further understanding. It also provides an introduction to the mathematical methods used to calculate the effective action by heat kernel methods.
Download or read book The Primordial Density Perturbation written by David H. Lyth and published by Cambridge University Press. This book was released on 2009-06-11 with total page 516 pages. Available in PDF, EPUB and Kindle. Book excerpt: The origin and evolution of the primordial perturbation is the key to understanding structure formation in the earliest stages of the Universe. It carries clues to the types of physical phenomena active in that extreme high-density environment. Through its evolution, generating first the observed cosmic microwave background anisotropies and later the distribution of galaxies and dark matter in the Universe, it probes the properties and dynamics of the present Universe. This graduate-level textbook gives a thorough account of theoretical cosmology and perturbations in the early Universe, describing their observational consequences and showing how to relate such observations to primordial physical processes, particularly cosmological inflation. With ambitious observational programmes complementing ever-increasing sophistication in theoretical modelling, cosmological studies will remain at the cutting edge of astrophysical studies for the foreseeable future.
Download or read book Particle Astrophysics Atomic Physics and Gravitation written by J. Thanh Van Tran and published by Atlantica Séguier Frontières. This book was released on 1994 with total page 540 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Modern Cosmology and the Dark Matter Problem written by D. W. Sciama and published by Cambridge University Press. This book was released on 1993 with total page 242 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book shows how modern cosmology has led to the idea of dark matter in the universe, and presents a new theory to explain it.
