Search results for: gravitation-in-astrophysics

Gravitation in Astrophysics

Author : B. Carter
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With the discovery of pulsars, quasars, and galactic X-ray sources in the late 60's and early 70's, and the coincident expansion in the search for gravitational waves, rela tivistic gravity assumed an important place in the astrophysics of localized objects. Only by pushing Einstein's solar-system-tested general theory of relativity to the study of the extremes of gravitational collapse and its outcomes did it seem that one could explain these frontier astronomical phenomena. This conclusion continues to be true today. Relativistic gravity had always played the central role in cosmology. The discov ery of the cosmic background radiation in 1965, the increasing understanding of matter physics at high energies in the decades following, and the growing wealth of observations on the large scale structure meant that it was possible to make increasingly detailed mod els of the universe, both today and far in the past. This development, not accidentally, was contemporary to that for localized objects described above.

Gravitation and Astrophysics

Author : Liao Liu
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It is the tradition of this series of workshops that theorists and experimentalists sharing common interests discuss a variety of issues relevant to promoting the quest to unify microscopic physics and gravitation. This proceedings volume embodies that tradition. It included current hot topics such as superconducting accelerometers, low-temperature-long-distance telescopes for gravitational waves, gravitational experiment with high-precision torsion pendulums and modern high-technology, physics of neutron stars, the theory of accretion disc, Ashtekhar's theory, physics of wormholes, and black holes and entropy. Contents:Empirical Tests of the Relativistic Gravity: The Past, The Present and The Future (W-T Ni)Exact Stiff Dissipative Cosmologies (M K Mak & T Harko)Precision Gravity Experiments Using Superconducting Accelerometers (H J Paik & M V Moody)Systematic Errors in the Measurement of G with Torsion Balance (Z-K Hu & J Luo)Baksan Laser Interferometer Observations: Gravitational and Geophysical Aspects (V Milyukov)Determining the Hubble Constant with Bidirectional Relativistic Proper Motions (Y-P Qin)Some Rigorous Results of the Cosmic Strings (X-Z Li)Gravitational Lensing as a Probe of Dark Energy (Z H Zhu & L Cao)Entropy of the Semiclassical Schwarzschild Black Hole (J-L Jing)Measurement of Tilt Tides with a Folded Pendulum (S-C Wu, S-H Fan, L Jun & J X Tang)A Relativistic Rotational Transformation and Its Possible Implications in Astrophysics (L Hsu & J-P Hsu)and other papers Readership: Researchers in gravitation and astrophysics.

Gravitation in Astrophysics

Author : B. Carter
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With the discovery of pulsars, quasars, and galactic X-ray sources in the late 60's and early 70's, and the coincident expansion in the search for gravitational waves, rela tivistic gravity assumed an important place in the astrophysics of localized objects. Only by pushing Einstein's solar-system-tested general theory of relativity to the study of the extremes of gravitational collapse and its outcomes did it seem that one could explain these frontier astronomical phenomena. This conclusion continues to be true today. Relativistic gravity had always played the central role in cosmology. The discov ery of the cosmic background radiation in 1965, the increasing understanding of matter physics at high energies in the decades following, and the growing wealth of observations on the large scale structure meant that it was possible to make increasingly detailed mod els of the universe, both today and far in the past. This development, not accidentally, was contemporary to that for localized objects described above.

Gravitation Astrophysics and Cosmology

Author : Vitaly Melnikov
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' The ICGAC-12 aimed to serve as a common platform around the Asia-Pacific region for the exchange and communication among all researchers in the fields of gravitation, astrophysics and cosmology. The scope covered in the conference includes dark matter, dark energy, experimental study of gravity, black holes, quantum Yang-Mills gravity, GR extension, variation of constants, fundamental physics space projects, relativistic astrophysics, white dwarfs, neutron stars, and gamma ray bursts. Contents:Classical Gravity and GR ExtensionsClassical and Quantum Cosmology, Dark Matter and Dark EnergyBlack Holes and WormholesStrings, Branes, Higher Spin Fields, Quantum GravityExtra Dimensions and Variation of ConstantsGravitational ExperimentsRelativistic Astrophysics Readership: Students and Professionals in the areas of Gravitation, Astrophysics, and Cosmology. Key Features:New approach to accelerated cosmic expansion based on extremely weak gauge fields associated with conserved baryon numberQuantum gravity based on Yang-Mills type gauge symmetry of space-time and translational gauge symmetryProminent contributors: A Beesham, R Maartence (South Africa); Shapiro, C Romero, D Ditman (Brazil); V Frolov (Canada); V Man''ko (Mexico); A Dolgov (Italy); and well-known scientists from RussiaKeywords:Astrophysics;Cosmology;Dark Matter;Dark Energy;Black Holes;Quantum Yang–Mills Gravity;GR Extension;Variation of Constants;Experimental Study of Gravity'

Gravitation and Astrophysics

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Aspects of Gravitation in Astrophysics

Author : Fabrizio Tamburini
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Aspects of Gravitation in Astrophysics. This book is the first "Manifesto" of a new emergent branch of Astronomy at the quantum limit, also called Quantum Astronomy. In the first chapters the reader starts with a mathematical and observational approach to accretion and circumstellar disks used in classical astronomy, used as background. With the Intermediate Polar RW UMi and AB Aur, the reader faces the practical data acquisition and handling at the telescope with classical techniques. In the latest chapters are introduced and discussed the extension of these classical concepts and formalisms to those of quantum physics applied to Astronomy. This novel approach is described in the two first applications proposed already in 2000 with the "Quantum Mousetrap", an instrumental technique for the detection of gravitational waves, here introduced and explained to the reader. Then is proposed the application of Glauber correlation functions for the characterization of the quantum states of light to obtain new information encoded in the electromagnetic field. Glauber correlations and Quantum Entanglement will be the first steps towards a new revolution in modern Astronomy

Gravitation and Astrophysics

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Gravity and the Quantum

Author : Jasjeet Singh Bagla
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This book provides a compilation of in-depth articles and reviews on key topics within gravitation, cosmology and related issues. It is a celebratory volume dedicated to Prof. Thanu Padmanabhan ("Paddy"), the renowned relativist and cosmologist from IUCAA, India, on the occasion of his 60th birthday. The authors, many of them leaders of their fields, are all colleagues, collaborators and former students of Paddy, who have worked with him over a research career spanning more than four decades. Paddy is a scientist of diverse interests, who attaches great importance to teaching. With this in mind, the aim of this compilation is to provide an accessible pedagogic introduction to, and overview of, various important topics in cosmology, gravitation and astrophysics. As such it will be an invaluable resource for scientists, graduate students and also advanced undergraduates seeking to broaden their horizons.

Gravitation in Astrophysics

Author : J. B. Hartle
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Proceedings of the Ninth Asia Pacific International Conference on Gravitation and Astrophysics

Author : Jun Luo
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The International Conference on Gravitation and Astrophysics(ICGA) is to serve the needs of research workers in gravitation and astrophysics in the Asia-Pacific region. This proceedings covers a wide and hot area of research, including cosmological model, gravitational lensing, precision measurement of G, CMB, Kerr space-time, gravitational wave, the LISA, LIGO, LCGT projects in Japan, black hole, dark matter, Yangndash;Mills gravity, neutron star, type la supernovae, quasi-local energy, anti-de Sitter space-time.

Gravitation and Astrophysics

Author : James M. Nester
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The ICGA series of conferences is specially aimed to serve the needs of the workers in this research area in the Asia-Pacific region. The previous conferences of this series have attracted a growing number of local, regional and international participants. 2005 was an auspicious year. Not only was it the International Year of Physics, commemorating Einstein's great achievements of 1905, it also was the anniversary of Einstein's development of General Relativity: he submitted the final form of his field equations on 25 November, 1915. Nine decades years later, around 40 Taiwan-based participants were joined by over 40 distinguished visitors from Canada, China, France, Japan, Korea, Russia, and the USA, and this volume includes many of the papers that were presented. The depth and breadth of these contributions reflect the high quality of the meeting and the development of the field in the Asia-Pacific region.

The Proceedings of the Fourth International Workshop on Gravitation and Astrophysics

Author : Xin Zhou Li
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It is the tradition of this series of workshops that theorists and experimentalists sharing common interests discuss a variety of issues relevant to promoting the quest to unify microscopic physics and gravitation. This proceedings volume embodies that tradition.It included current hot topics such as superconducting accelerometers, low-temperature-long-distance telescopes for gravitational waves, gravitational experiment with high-precision torsion pendulums and modern high-technology, physics of neutron stars, the theory of accretion disc, Ashtekhar's theory, physics of wormholes, and black holes and entropy.

Proceedings of the Twelfth Asia Pacific International Conference on Gravitation Astrophysics and Cosmology

Author : Vitaly Melnikov
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"The ICGAC-12 aimed to serve as a common platform around the Asia-Pacific region for the exchange and communication among all researchers in the fields of gravitation, astrophysics and cosmology. The scope covered in the conference includes dark matter, dark energy, experimental study of gravity, black holes, quantum Yang-Mills gravity, GR extension, variation of constants, fundamental physics space projects, relativistic astrophysics, white dwarfs, neutron stars, and gamma ray bursts."--Provided by publisher.

Proceedings of VI APCTP international conference on gravitation and astrophysics

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Gravitation and Astrophysics

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Gravity Particles and Astrophysics

Author : P. Wesson
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This book deals with the relationship between gravitation and elementary particle physics, and the implications of these subjects for astrophysics. There has, in recent years, been renewed interest in theories that connect up gravitation and particle physics, and in the astrophysical consequences of such theories. Some of these accounts involve a time-variation of the Newtonian gravitational parameter, G. In this respect, the present book may be regarded as a companion to my Cosmology and Geophysics (Hilger, Bristol, 1978). There is some overlap as regards the discussion of G-variability, but the emphasis in the present book is on astrophysics while the emphasis in the other one is on geophysics. The subject is a very broad one indeed, and in giving a review of it I have adopted a somewhat unorthodox way of presenting the material involved. The main reason for this is that a review of such a wide subject should aim at two levels: the level of the person who is interested in it, and the level of the person who is professionally engaged in research into it. To achieve such a two-level coverage, I have split the text up into two parts. The first part (Chapters 1-7) represents a relatively non-technical overview of the subject, while the second part (Chapters 8-11) represents a technical examination of the most important aspects of non-Einsteinian gravitational theory and its relation to astrophysics.

10th International Conference on General Relativity and Gravitation Relativistic astrophysics experimental gravitation quantum gravity

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Gravitational Waves

Author : Michele Maggiore
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The two-volume book Gravitational Waves provides a comprehensive and detailed account of the physics of gravitational waves. While Volume 1 is devoted to the theory and experiments, Volume 2 discusses what can be learned from gravitational waves in astrophysics and in cosmology, by systematizing a large body of theoretical developments that have taken place over the last decades. The second volume also includes a detailed discussion of the first direct detections of gravitational waves. In the author's typical style, the theoretical results are generally derived afresh, clarifying or streamlining the existing derivations whenever possible, and providing a coherent and consistent picture of the field. The first volume of Gravitational Waves , which appeared in 2007, has established itself as the standard reference in the field. The scientific community has eagerly awaited this second volume. The recent direct detection of gravitational waves makes the topics in this book particularly timely.

Gravitational Wave Astrophysics

Author : Carlos F. Sopuerta
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This book offers review chapters written by invited speakers of the 3rd Session of the Sant Cugat Forum on Astrophysics - Gravitational Waves Astrophysics. All chapters have been peer reviewed. The book goes beyond normal conference proceedings in that it provides a wide panorama of the astrophysics of gravitational waves and serves as a reference work for researchers in the field.

Gravitational Wave Astrophysics with Pulsar Timing Arrays

Author : Chiara M. F. Mingarelli
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This Ph.D. thesis from the University of Birmingham UK opens new research avenues in the use of Pulsar Timing Arrays (PTAs) to study populations of super-massive black hole binaries through gravitational-wave observations. Chiara Mingarelli's work has shown for the first time that PTAs can yield information about the non-linear dynamics of the gravitational field. This is possible because PTAs capture, at the same time, radiation from the same source emitted at stages of its binary evolution that are separated by thousands of years. Dr. Mingarelli, who is the recipient of a Marie Curie International Outgoing Fellowship, has also been amongst the pioneers of the technique that will allow us to probe the level of anisotropy of the diffuse gravitational-wave background radiation from the whole population of super-massive black hole binaries in the Universe. Indeed, future observations will provide us with hints about the distribution of galaxies harboring massive black holes and insights into end products of hierarchical mergers of galaxies.