Texas/PASCOS '92


Book Description

This set of conference papers on relativistic astrophysics, and on particles, strings and cosmology offer about 40 full-length papers and additional short papers presented in workshops.




Particle Physics and Astrophysics


Book Description




The Big Bang And Other Explosions In Nuclear And Particle Astrophysics


Book Description

This volume of important papers by one the world's leading astrophysicists provides a sweeping survey of the incisive and exciting applications of nuclear and particle physics to a wide range of problems in astrophysics and cosmology.The prime focus of the book is on Big Bang cosmology and the role of primordial nucleosynthesis in establishing the modern consensus on the Big Bang. This leads into the connection of cosmology to particle physics and the constraints put on various elementary particles by astrophysical arguments. Big Bang Nucleosynthesis has also led to the argument for nonbaryonic dark matter and is thus related to the major problem in physical cosmology today, namely, structure formation. The nuclear-particle interface with astrophysics also extends to the other topics of major interest such as the age of the universe, cosmic rays, supernovae, and solar neutrinos, each of which will be discussed in some detail. Each section contains historical papers, current papers, and frequently a popular article on the subject which provides an overview of the topic.This volume is testimony to the success of the integration of nuclear and particle physics with astrophysics and cosmology, and to the ingenuity of the work in this area which has earned the author numerous prestigious awards. The book, which is accessible to beginning graduate students, should be of particular interest to researchers and students in astronomy, astrophysics, cosmology and gravitation, and also in high energy and nuclear physics.




Searching for the Long-Duration Gamma-Ray Burst Progenitor


Book Description

Nominated as an outstanding thesis by the Department of Physics and Astronomy of the University of New Mexico, this thesis seeks to identify the gamma-ray burst (GRB) progenitor. GRBs are extragalactic explosions that briefly outshine entire galaxies, but the mechanism that can release that much energy over a 100 second burst is still a mystery. The leading candidate for the GRB progenitor is currently a massive star which collapses to form a black hole–accretion disk system that powers the GRB. GRB afterglows, however, do not always show the expected behavior of a relativistic blast wave interacting with the stellar wind that such a progenitor should have produced before its collapse./pppIn this book, the author uses the Zeus-MP astrophysical hydrodynamics code to model the environment around a stellar progenitor prior to the burst. He then develops a new semi-analytic MHD and emission model to produce light curves for GRBs encountering these realistic density profiles. The work ultimately shows that the circumburst medium surrounding a GRB at the time of the explosion is much more complex than a pure wind, and that observed afterglows are entirely consistent with a large subset of proposed stellar progenitors.




Cosmion-94


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Nuclear Physics


Book Description




Cosmological Special Relativity


Book Description

This book presents Einstein's theory of space and time in detail, and describes the large-scale structure of space, time and velocity as a new cosmological special relativity. A cosmological Lorentz-like transformation, which relates events at different cosmic times, is derived and applied. A new law of addition of cosmic times is obtained, and the inflation of the space at the early universe is derived, both from the cosmological transformation. The relationship between cosmic velocity, acceleration and distances is given. In the appendices gravitation is added in the form of a cosmological general relativity theory and a five-dimensional unified theory of space, time and velocity. This book is of interest to cosmologists, astrophysicists, theoretical physicists, mathematical physicists and mathematicians.







New Challenges in Astrophysics


Book Description

The Inter-University Centre For Astronomy And Astrophysics, An Autonomous Institution Of The University Grants Commission, Was Formally Dedicated To The Academics Participating In The Centres Activities On 28Th December, 1992. This Occasion Was Marked By A Two-Day International Dedication Seminar. Several Distinguished Astronomers And Astrophysicists From All Over The World Participated In This Seminar And Delivered Invited Lectures. This Volume Presents The Written Version Of These Lectures.In Addition To A Brief History Of How Iucaa Came Into Being, The Volume Contains Written Version Of The Lectures Delivered By Several Eminent Scientists Including Late Professor S. Chandrasekhar (Nobel Laureate). The Topics Range From The History Of Indian Astronomy To The Details Of The Structure Formation In The Expanding Universe. Each Lecture Is Fairly Detailed And Provides A Comprehensive Review Of The Subject.




Recent Advances In The Superworld - Proceedings Of The International Workshop


Book Description

The realization that precision LEP data lend support to the idea of supersymmetric grand unification and supersymmetry in general, led to the organization of the First HARC International Workshop on Recent Advances in the SuperWorld. The idea was to have a workshop that discussed all aspects of the supersymmetric world — the SuperWorld as it should be properly known. These aspects are so diverse that they are usually studied by high energy physicists with vastly different interests. The selection of speakers included the whole spectrum in 'energy', from experimental physicists, to specialists in low energy phenomenology, supersymmetric grand unification, supergravity, superstrings and supercosmology.