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Cosmologia Cuantica Inhomogenea
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Book Synopsis Feeding Compact Objects (IAU S290) by : Chengmin Zhang
Download or read book Feeding Compact Objects (IAU S290) written by Chengmin Zhang and published by Cambridge University Press. This book was released on 2013-03-21 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This decade has seen a large number of high-energy space missions, which, alongside ground-based optical and radio telescopes, have enabled the detailed study of accreting compact objects. IAU S290 addresses the state-of-the-art research on accretion in astrophysical objects and systems ranging in scale from active galactic nuclei down to stellar black holes, neutron stars and white dwarfs, by bringing together scientists from each of these fields. It focuses on understanding the common physics of slow and relativistic outflows in these objects and features reviews on modelling, observations and instrumentation. Specific topics covered in this volume include: the physics of accreting systems, the magnetic environment around compact objects, large scale properties of accretion, the accretion-ejection connection, jets and outflows, and instrumentation. The fundamentals of accretion and its applications are reviewed in several of the papers, making this a useful reference guide for researchers and graduate students in astrophysics.
Book Synopsis Basic Concepts In Relativistic Astrophysics by : Lizhi Fang
Download or read book Basic Concepts In Relativistic Astrophysics written by Lizhi Fang and published by World Scientific Publishing Company. This book was released on 1983-12-01 with total page 230 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this book, the interesting results of similar works carried out by both authors independently, is presented in a unique manner. This book is written as a token of exchange between the East and the West and it is hoped that it will lead to greater cooperation between the scientists.
Book Synopsis Populations of High-Energy Sources in Galaxies (IAU S230) by : E. J. A. Meurs
Download or read book Populations of High-Energy Sources in Galaxies (IAU S230) written by E. J. A. Meurs and published by Cambridge University Press. This book was released on 2006-06-15 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: For the last 40 years astronomers have observed sources of intense X-ray radiation from beyond our Solar System. These have been associated with remarkable objects, such as neutron stars and black holes. Current satellite observatories have enabled us to extend the studies of these objects from the Milky Way and Magellanic Clouds to individual X-ray sources in other galaxies. At the same time, imaging facilities at gamma-rays and TeV energies have improved enormously, leading to many further discoveries within our own galaxy. This Symposium presents an overview of these new developments, covering detailed studies of individual sources within the Milky Way, global descriptions of X-ray source populations in other galaxies, and less resolved relatives at high redshift. Galaxy nuclei and diffuse emission components are included, as are new discoveries at gamma-rays and TeV energies. IAU S230 is a valuable resource for astronomers and graduates working in high-energy astrophysics.
Book Synopsis Mathematical Models of Physics Problems by : Luis Alfredo Anchordoqui
Download or read book Mathematical Models of Physics Problems written by Luis Alfredo Anchordoqui and published by Nova Science Publishers. This book was released on 2013 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This textbook is intended to provide a foundation for a one-semester introductory course on the advanced mathematical methods that form the cornerstones of the hard sciences and engineering. The work is suitable for first year graduate or advanced undergraduate students in the fields of Physics, Astronomy and Engineering. This text therefore employs a condensed narrative sufficient to prepare graduate and advanced undergraduate students for the level of mathematics expected in more advanced graduate physics courses, without too much exposition on related but non-essential material. In contrast to the two semesters traditionally devoted to mathematical methods for physicists, the material in this book has been quite distilled, making it a suitable guide for a one-semester course. The assumption is that the student, once versed in the fundamentals, can master more esoteric aspects of these topics on his or her own if and when the need arises during the course of conducting research. The book focuses on two core subjects: complex analysis and classical techniques for the solution of ordinary and partial differential equations. These topics are complemented with occasional terse reviews of other material, including linear algebra, to the extent required to ensure the book can be followed from end-to-end. This textbook is designed to provide a framework for a roughly 12 week course, with 3 weeks devoted to complex variables, a 1 week refresher on linear algebra, followed by 5 and 3 weeks devoted to ordinary and partial differential equations, respectively. This schedule leaves time for a couple of exams. The narrative is complemented with ample problem sets, including detailed guides to solving the problems.
Book Synopsis Variability of Blazars by : E. VALTAOJA (Ed)
Download or read book Variability of Blazars written by E. VALTAOJA (Ed) and published by Cambridge University Press. This book was released on 1992 with total page 484 pages. Available in PDF, EPUB and Kindle. Book excerpt: Blazars (also known as BL Lac objects), first discovered in 1978, are unusually energetic objects in the extragalactic universe. About 200 are known or suspected. They are radio sources with highly variable optical and radio emission, as well as high polarisation, and their optical spectra normally have no distinguishable features. It is generally accepted that they belong to that class of galaxies with active galactic nuclei, which are presumed to be driven by infall of matter to a supermassive black hole. In this book researchers give a complete summary of the observations of blazars and the theoretical interpretation. A comprehensive listing of confirmed and candidate objects is included. Mechanisms in which the variability can arise from shocks and relativistic jets are discussed. There are at least four different answers given to the question: what is a blazar? This book is a complete overview of the violent activity observed in these extreme active galactic nuclei.
Book Synopsis Gravitation and Spacetime by : Hans C. Ohanian
Download or read book Gravitation and Spacetime written by Hans C. Ohanian and published by Cambridge University Press. This book was released on 2013-04-08 with total page 545 pages. Available in PDF, EPUB and Kindle. Book excerpt: This text provides a quantitative introduction to general relativity for advanced undergraduate and graduate students.
Book Synopsis Pseudo-Complex General Relativity by : Peter O. Hess
Download or read book Pseudo-Complex General Relativity written by Peter O. Hess and published by Springer. This book was released on 2015-10-31 with total page 263 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book explores the role of singularities in general relativity (GR): The theory predicts that when a sufficient large mass collapses, no known force is able to stop it until all mass is concentrated at a point. The question arises, whether an acceptable physical theory should have a singularity, not even a coordinate singularity. The appearance of a singularity shows the limitations of the theory. In GR this limitation is the strong gravitational force acting near and at a super-massive concentration of a central mass. First, a historical overview is given, on former attempts to extend GR (which includes Einstein himself), all with distinct motivations. It will be shown that the only possible algebraic extension is to introduce pseudo-complex (pc) coordinates, otherwise for weak gravitational fields non-physical ghost solutions appear. Thus, the need to use pc-variables. We will see, that the theory contains a minimal length, with important consequences. After that, the pc-GR is formulated and compared to the former attempts. A new variational principle is introduced, which requires in the Einstein equations an additional contribution. Alternatively, the standard variational principle can be applied, but one has to introduce a constraint with the same former results. The additional contribution will be associated to vacuum fluctuation, whose dependence on the radial distance can be approximately obtained, using semi-classical Quantum Mechanics. The main point is that pc-GR predicts that mass not only curves the space but also changes the vacuum structure of the space itself. In the following chapters, the minimal length will be set to zero, due to its smallness. Nevertheless, the pc-GR will keep a remnant of the pc-description, namely that the appearance of a term, which we may call "dark energy", is inevitable. The first application will be discussed in chapter 3, namely solutions of central mass distributions. For a non-rotating massive object it is the pc-Schwarzschild solution, for a rotating massive object the pc-Kerr solution and for a charged massive object it will be the Reissner-Nordström solution. This chapter serves to become familiar on how to resolve problems in pc-GR and on how to interpret the results. One of the main consequences is, that we can eliminate the event horizon and thus there will be no black holes. The huge massive objects in the center of nearly any galaxy and the so-called galactic black holes are within pc-GR still there, but with the absence of an event horizon! Chapter 4 gives another application of the theory, namely the Robertson-Walker solution, which we use to model different outcomes of the evolution of the universe. Finally the capability of this theory to predict new phenomena is illustrated.
Book Synopsis Extragalactic Jets from Every Angle (IAU S313) by : Francesco Massaro
Download or read book Extragalactic Jets from Every Angle (IAU S313) written by Francesco Massaro and published by Cambridge University Press. This book was released on 2015-04-16 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Extragalactic jets provide the direct observational evidence for a connection between supermassive black holes and their surrounding cosmic environments. They deliver the energy released by an accreting black hole across large distances and impact the formation and evolution of surrounding structures, carrying information about the black hole's power, spin, accretion state and characteristic timescales. IAU Symposium 313 brings together observational astronomers working across the electromagnetic spectrum with theorists, to investigate our understanding of the physics of relativistic jets. They address questions on topics such as: unification scenarios for blazars and radio galaxies, the interactions between jets and their environments, jet composition and structure, the role of magnetic fields, mechanisms of particle acceleration, high-energy emissions, and the scaling of physical jet phenomena with black-hole mass, from extragalactic to galactic sources. This volume benefits observers and theorists, both researchers and advanced students, working on relativistic jets in distant galaxies.
Book Synopsis Topics On Strong Gravity: A Modern View On Theories And Experiments by : Cesar Augusto Zen Vasconcellos
Download or read book Topics On Strong Gravity: A Modern View On Theories And Experiments written by Cesar Augusto Zen Vasconcellos and published by World Scientific. This book was released on 2019-12-26 with total page 299 pages. Available in PDF, EPUB and Kindle. Book excerpt: 'The book concentrates attention on extended alternative theories of gravity and on the best astrophysical laboratories to probe the strong gravity-field regime: black holes, pulsars and neutron stars … Readers will likely share the satisfaction the editor and contributors say they experienced as they organized the book.'SirReadaLotFor more than a century, our understanding of gravitational physics was based on Albert Einstein's theory of General Relativity, which fundamentally changed our understanding of the Universe, its origin, and its evolutionary process. General Relativity accurately describes a large number of phenomena on very different scales. As such, it has been very well tested and its remarkable predictions are compatible with most experimental and observational data. However, the observational and experimental results compatible with General Relativity fall in its vast majority under the weak gravitational field regime. In recent years, discrepancies between the data and the corresponding predictions of General Relativity have been observed and have generated intense research activity. One of the most critical aspects of General Relativity is the presence of singularities in extreme physical situations. These discrepancies indicate that either the parameters of the theory must be modified in the regime of strong field gravity/high energy and large space-time curvature, or the theory itself should be modified. In this book, we focus our attention on extended alternative gravity theories and the best astrophysical laboratories to probe the strong field regime: black holes, pulsars, and neutron stars.
Book Synopsis Scientific Philosophy by : Gustavo E. Romero
Download or read book Scientific Philosophy written by Gustavo E. Romero and published by Springer. This book was released on 2018-11-02 with total page 195 pages. Available in PDF, EPUB and Kindle. Book excerpt: This textbook presents the basics of philosophy that are necessary for the student and researcher in science in order to better understand scientific work. The approach is not historical but formative: tools for semantical analysis, ontology of science, epistemology, and scientific ethics are presented in a formal and direct way. The book has two parts: one with the general theory and a second part with application to some problems such as the interpretation of quantum mechanics, the nature of mathematics, and the ontology of spacetime. The book addresses questions such as "What is meaning?", "What is truth?", "What are truth criteria in science?", "What is a theory?", "What is a model?" "What is a datum?", "What is information?", "What does it mean to understand something?", "What is space?", "What is time?", "How are these concepts articulated in science?" "What are values?" "What are the limits of science?", and many more. The philosophical views presented are "scientific" in the sense that they are informed by current science, they are relevant for scientific research, and the method adopted uses the hypothetical-deductive approach that is characteristic of science. The results and conclusions, as any scientific conclusion, are open to revision in the light of future advances. Hence, this philosophical approach opposes to dogmatic philosophy. Supported by end-of-chapter summaries and a list of special symbols used, the material will be of interest for students and researchers in both science and philosophy. The second part will appeal to physicists and mathematicians.
Book Synopsis Introduction to Black Hole Astrophysics by : Gustavo E. Romero
Download or read book Introduction to Black Hole Astrophysics written by Gustavo E. Romero and published by Springer. This book was released on 2013-09-14 with total page 326 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is based on the lecture notes of a one-semester course on black hole astrophysics given by the author and is aimed at advanced undergraduate and graduate students with an interest in astrophysics. The material included goes beyond that found in classic textbooks and presents details on astrophysical manifestations of black holes. In particular, jet physics and detailed accounts of objects like microquasars, active galactic nuclei, gamma-ray bursts, and ultra-luminous X-ray sources are covered, as well as advanced topics like black holes in alternative theories of gravity. The author avoids unnecessary technicalities and to some degree the book is self-contained. The reader will find some basic general relativity tools in Chapter 1. The appendices provide some additional mathematical details that will be useful for further study, and a guide to the bibliography on the subject.
Book Synopsis Centennial Of General Relativity: A Celebration by : Cesar Augusto Zen Vasconcellos
Download or read book Centennial Of General Relativity: A Celebration written by Cesar Augusto Zen Vasconcellos and published by World Scientific. This book was released on 2017-02-17 with total page 335 pages. Available in PDF, EPUB and Kindle. Book excerpt: It has been over 100 years since the presentation of the Theory of General Relativity by Albert Einstein, in its final formulation, to the Royal Prussian Academy of Sciences. To celebrate 100 years of general relativity, World Scientific publishes this volume with a dual goal: to assess the current status of the field of general relativity in broad terms, and discuss future directions. The volume thus consists of broad overviews summarizing major developments over the past decades and their perspective contributions.
Book Synopsis Relativistic Kinetic Theory by : Gregory V. Vereshchagin
Download or read book Relativistic Kinetic Theory written by Gregory V. Vereshchagin and published by Cambridge University Press. This book was released on 2017-02-16 with total page 343 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents fundamentals, equations, and methods of solutions of relativistic kinetic theory, with applications in astrophysics and cosmology.
Book Synopsis Cosmology and Gravitation by : Mario Novello
Download or read book Cosmology and Gravitation written by Mario Novello and published by AIP Conference Proceedings (Nu. This book was released on 2009-06-09 with total page 464 pages. Available in PDF, EPUB and Kindle. Book excerpt: The XIIIth Brazilian School of Cosmology and Gravitation covered a series of fundamental topics in our current understanding of Cosmology, Astrophysics, and Gravity. The purpose of the School is to give a view of the state of the art of these areas for students and post-docs, and also for the more experienced practitioners. Lectures were delivered by very well-known researchers in topics that covered several areas of theoretical and observational Cosmology, Astrophysics, and Gravitation, ranging from Quantum Gravity to Active Galactic Nuclei.
Book Synopsis The Physics and Astrophysics of Neutron Stars by : Luciano Rezzolla
Download or read book The Physics and Astrophysics of Neutron Stars written by Luciano Rezzolla and published by Springer. This book was released on 2019-01-09 with total page 825 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book summarizes the recent progress in the physics and astrophysics of neutron stars and, most importantly, it identifies and develops effective strategies to explore, both theoretically and observationally, the many remaining open questions in the field. Because of its significance in the solution of many fundamental questions in nuclear physics, astrophysics and gravitational physics, the study of neutron stars has seen enormous progress over the last years and has been very successful in improving our understanding in these fascinating compact objects. The book addresses a wide spectrum of readers, from students to senior researchers. Thirteen chapters written by internationally renowned experts offer a thorough overview of the various facets of this interdisciplinary science, from neutron star formation in supernovae, pulsars, equations of state super dense matter, gravitational wave emission, to alternative theories of gravity. The book was initiated by the European Cooperation in Science and Technology (COST) Action MP1304 “Exploring fundamental physics with compact stars” (NewCompStar).
Book Synopsis Quantum Cosmology - The Supersymmetric Perspective - Vol. 2 by : Paulo Vargas Moniz
Download or read book Quantum Cosmology - The Supersymmetric Perspective - Vol. 2 written by Paulo Vargas Moniz and published by Springer. This book was released on 2010-04-02 with total page 290 pages. Available in PDF, EPUB and Kindle. Book excerpt: We read in order to know we are not alone, I once heard, and perhaps it could also be suggested that we write in order not to be alone, to endorse, to promote continuity. The idea for this book took about 10 years to materialize, and it is the author’s hope that its content will constitute the beginning of further explorations beyond current horizons. More speci cally, this book appeals to the reader to engage upon and persevere with a journey, moving through the less well explored territories in the evolution of the very early universe, and pushing towards new landscapes. P- haps, during or after consulting this book, this attitude and this willingness will be embraced by someone, somewhere, and this person will go on to enrich our quantum cosmological description of the early universe, by means of a clearer supersymm- ric perspective. It is to these creative and inquisitive ‘young minds’ that the book is addressed. The reader will not therefore nd in this book all the answers to all the problems regarding a supersymmetric and quantum description of the early universe, and this remark is substantiated in the book by a list of unresolved and challenging problems, itself incomplete.
Book Synopsis Quantum Cosmology - The Supersymmetric Perspective - Vol. 1 by : Paulo Vargas Moniz
Download or read book Quantum Cosmology - The Supersymmetric Perspective - Vol. 1 written by Paulo Vargas Moniz and published by Springer. This book was released on 2010-07-02 with total page 358 pages. Available in PDF, EPUB and Kindle. Book excerpt: We read in order to know we are not alone, I once heard, and perhaps it could also be suggested that we write in order not to be alone, to endorse, to promote continuity. The idea for this book took about ten years to materialize, and it is the author’s hope that its content will constitute the beginning of further explorations beyond current horizons. More speci cally, this book appeals to the reader to engage upon and persevere with a journey, moving through the less well explored territories in the evolution of the very early universe, and pushing towards new landscapes. P- haps, during or after consulting this book, this attitude and this willingness will be embraced by someone, somewhere, and this person will go on to enrich our quantum cosmological description of the early universe, by means of a clearer supersymm- ric perspective. It is to these creative and inquisitive ‘young minds’ that the book is addressed. The reader will not therefore nd in this book all the answers to all the problems regarding a supersymmetric and quantum description of the early universe, and this remark is substantiated in the book by a list of unresolved and challenging problems, itself incomplete.
