This is a comprehensive account of RR Lyrae stars, and traces the story from their initial discovery a century ago, through to their present status. This book reviews our current understanding of RR Lyrae stars. It is a unique explanation of the multiple applications of these variable stars for a range of astrophysical problems. Horace A. Smith describes the use of RR Lyrae stars as probes of old stellar populations, both in the Milky Way and other galaxies, and as an outstanding testing ground for stellar evolution and pulsation theories. He stresses the significance of variable stars for our ultimate understanding of the history and scale of the Milky Way and nearer extragalactic systems. For advanced students and researchers of astronomy, this is a definitive account of the modern theories surrounding RR Lyrae stars.

Discs occur in a wide variety of astronomical contexts, ranging in size from planetary ring systems to galaxies. Because the dynamical problems posed by each type of disc are remarkably similar, the Astronomy Department of the University of Manchester decided to bring together experts in each area for a conference in December 1988. This book is a collection of the papers presented at the conference. It contains mainly review papers covering recent developments in both theory and observations of planetary ring systems, discs in star-forming regions, protoplanetary discs, accretion discs and galaxy discs presented by an expert in each field. The book also gives brief summaries of contributed papers outlining current research by many of the participants.

This book is a comprehensive survey of the current research in the field of cataclysmic variables and low-mass X-ray binaries. These compact binaries contain a Roche-lobe filling low-mass star and an accreting white dwarf, neutron star, or black hole. In the turbulent process of accretion, a broad and highly variable spectrum of radiation is produced. The interpretation of the behaviour of these binaries is the present work of hundreds of astronomers, many of whom contributed to this volume. Among the topics covered here are observations and theories of low-mass neutron star and black hole binaries, magnetic and non-magnetic white dwarf binaries, transient X-ray sources, novae, and binary pulsars, as well as theories of the evolution of these binaries. The book is based on material presented at the 11th North American Workshop on Cataclysmic Variables and Low Mass X-ray Binaries held in Santa Fe, New Mexico, in October 1989. Each contribution contains sufficient in-depth information to be of use to the specialist, while the breadth of subjects covered will ensure a wide audience among advanced undergraduates and graduate students.

Current research on the origin and evolution of active galaxies is comprehensively surveyed in this collaborative volume. Both of the proposed types of central activity - active galactic nuclei and starbursts - are analysed with a particular emphasis on their relationship to the large-scale properties of the host galaxy. The crucial question is what triggers and fuels nuclear activity now and at earlier epochs? The topics covered here are gas flows near to massive black holes, the circumnuclear galactic regions, and the large-scale bars in disk galaxies. Aspects of nuclear bursts of star formation, and the relationship between central activity and the gas and stellar dynamics of the host galaxy are addressed as well. The contributors to this book for professionals and graduate students are world experts on galaxy evolution.

The study of cataclysmic variables - interacting binary stars containing a white dwarf accreting from an orbiting companion - is undergoing an exciting renaissance, as it embraces observations at all wavelengths. Cataclysmic variables allow, in particular, the direct and detailed study of equilibrium and non-equilibrium accretion discs; in turn these developments also help in our understanding of X-ray binaries, black holes and active galactic nuclei. This timely volume provides the first comprehensive survey of cataclysmic variable stars, integrating theory and observation into a single, synthesised text. An introductory chapter gives the historical background of studies of cataclysmic variables. The author then goes on to give an up-to-date review of both the observations (at all wavelengths, and over all time-scales), the theories, the models of the structures and accretion processes believed to be involved. A very detailed bibliography is also provided to guide the reader to pertinent primary literature.

The gravitational million-body problem is a model for understanding the dynamics of rich star clusters. This text describes the theory astronomers need for studying globular star clusters. After introducing the million-body problem from various view-points, the book systematically develops the tools needed for studying the million-body problems in nature, and introduces the most important theoretical models. Written for graduate students and researchers in astrophysics and astronomy, this text also has important applications in the fields of theoretical physics, computational science and mathematics.

This book provides a concise introduction to the mathematical aspects of the origin, structure and evolution of the universe. The book begins with a brief overview of observational and theoretical cosmology, along with a short introduction of general relativity. It then goes on to discuss Friedmann models, the Hubble constant and deceleration parameter, singularities, the early universe, inflation, quantum cosmology and the distant future of the universe. This new edition contains a rigorous derivation of the Robertson-Walker metric. It also discusses the limits to the parameter space through various theoretical and observational constraints, and presents a new inflationary solution for a sixth degree potential. This book is suitable as a textbook for advanced undergraduates and beginning graduate students. It will also be of interest to cosmologists, astrophysicists, applied mathematicians and mathematical physicists.

This text presents numerous illustrations of the observed variability of cataclysmic variable stars. It provides a clear explanation and thorough up-to-date overview of this phenomena at a level accessible to the advanced amateur or undergraduate student.

This second volume of a comprehensive three-volume work on theoretical astrophysics deals with stellar physics. After reviewing the key observational results and nomenclature used in stellar astronomy, the book develops a solid understanding of central concepts including stellar structure and evolution, the physics of stellar remnants, pulsars, binary stars, the sun and planetary systems, interstellar medium and globular clusters. Throughout, the reader's comprehension is developed and tested with more than seventy-five exercises. This indispensable volume will allow graduate students to master the material sufficiently to read and engage in research with heightened understanding. It can be used alone or in conjunction with Volume 1, which covers a wide range of astrophysical processes, and the forthcoming Volume 3, on galaxies and cosmology.

The Local Group is a small cluster of galaxies of which thirty-five members are currently known, including the Milky Way. With characteristic clarity of expression, Sidney van den Bergh provides a complete overview of all that is known about the galaxies of the Local Group and their evolution. He also places this knowledge in the wider context of continuing studies of galaxy formation and evolution, the cosmic distance scale, and the conditions in the early Universe. This volume thoroughly details our current understanding of each of the thirty-five members of the Local Group, as well as those galaxies previously regarded as possible members. The book goes on to examine the mass, stability and evolution of the Local Group as a whole and includes many important, previously unpublished results and conclusions.

Understanding how stars rotate is central to modeling their structure, formation and evolution, as well as understanding how they interact with their environment and companion stars. This lucid introduction to stellar rotation combines theory and observation, and includes all the latest developments in the field. Jean-Louis Tassoul, a leading authority on the subject, comprehensively surveys how the rotation of stars affects the structure and evolution of the Sun, single stars, and close binaries. This volume will greatly interest graduate students and researchers studying solar and stellar rotation and close binary systems. It will also appeal to those with a more general interest in solar and stellar physics, star formation, binary stars, and the hydrodynamics of rotating fluids--including geophysicists, planetary scientists, and plasma physicists.

Contemporary astronomers continue to search for ways to understand the irregular distribution of galaxies in our Universe. This volume describes gravitational theory, computer simulations and observations related to galaxy distribution functions, which is a general method for measuring the distribution of galaxies and their motions. Coverage embeds distribution functions in a broader astronomical context, and includes other contemporary topics such as correlation functions, fractals, bound clusters, topology, percolation and minimal spanning trees. Throughout, theory, computer simulation and observation are carefully interwoven and critically compared, and key results are derived and the necessary gravitational physics provided. The book also shows how future observations can test the theoretical models for the evolution of galaxy clustering at early times in our Universe. This clear and authoritative volume is written at a level suitable for graduate students, and will be of key interest to astronomers, cosmologists, physicists and applied statisticians.

This long-awaited graduate textbook, written by two pioneers of the field, is the first to provide a comprehensive introduction to the observations, theories and consequences of stellar winds. The rates of mass loss and the wind velocities are explained from basic physical principles. This book also includes chapters clearly explaining the formation and evolution of interstellar bubbles, and the effects of mass loss on the evolution of high- and low-mass stars. Each topic is introduced simply to explain the basic processes and then developed to provide a solid foundation for understanding current research. This authoritative textbook is designed for advanced undergraduate and graduate students and researchers seeking an understanding of stellar winds and, more generally, supersonic flows from astrophysical objects. It is based on courses taught in Europe and the US over the past twenty years and includes seventy problems (with answers) for coursework or self-study.

This long-awaited graduate textbook, written by two pioneers in the field, provides a comprehensive introduction to the observations, theories, and consequences of stellar winds. The rates of mass loss and the wind velocities are explained from basic physical principles. This textbook also includes chapters clearly explaining the formation and evolution of interstellar bubbles and the effects of mass loss on the evolution of high- and low-mass stars. Each topic is introduced simply to explain the basic processes and then developed to provide a solid foundation for understanding current research. This authoritative textbook is designed for advanced undergraduate and graduate students and researchers seeking an understanding of stellar winds and, more generally, supersonic flows from astrophysical objects. It is based on courses taught in Europe and the United States over the past twenty years and includes seventy problems for coursework or self-study.

This book provides an up-to-date and comprehensive account of quasars and active galactic nuclei (AGN). The latest observations and theoretical models are combined in this clear, pedagogic textbook for advanced undergraduates and graduate students. Researchers will also find this wide-ranging and coherent review invaluable. Throughout, detailed derivations of important results are provided to ensure the book is self contained. And theories and models are critically compared with detailed and often puzzling observations from across the spectrum. We are led through all the key topics, including quasar surveys, continuum radiation, time variability, relativistic beaming, accretion disks, jet sidedness, gravitational lensing, unification and detailed, multi-wavelength studies of individual objects. Particular emphasis is placed on radio, X- and gamma-ray observations--not covered in depth in any previous book. All those entering into this exciting and dynamic area of astronomy research will find this book an ideal introduction.

Part of the reissued Oxford Classic Texts in the Physical Sciences series, this book was first published in 1983, and has swiftly become one of the great modern classics of relativity theory. It represents a personal testament to the work of the author, who spent several years writing and working-out the entire subject matter.

The theory of black holes is the most simple and beautiful consequence of Einstein's relativity theory. At the time of writing there was no physical evidence for the existence of these objects, therefore all that Professor Chandrasekhar used for their construction were modern mathematical concepts of space and time. Since that time a growing body of evidence has pointed to the truth of Professor Chandrasekhar's findings, and the wisdom contained in this book has become fully evident.

With the advent of large, ground-based telescopes and space telescopes, it is now possible to study in detail stars outside our galaxy - in neighbouring galaxies in the so-called Local Group. The VIII Canary Islands Winter School of Astrophysics gathered leading experts from around the world to review this exciting area of research - extragalactic stellar astrophysics. This volume presents eight specially written articles based on the meeting, reviewing how the study of stars in nearby galaxies can be used to understand stellar and galactic structure and evolution in general. This book covers all aspects of extragalactic stellar astrophysics: stellar physics, stellar winds, stellar evolution, the use of photometric and spectroscopic techniques for studying extragalactic stars, stellar populations, chemical evolution, star formation histories and the calibration of the extragalactic distance scale. This volume provides graduate students and researchers with an invaluable introduction to and reference on the new subject of extragalactic stellar astrophysics.

In the past two decades, scientists have made remarkable progress in understanding stars. This graduate-level textbook provides a systematic, self-contained and lucid introduction to the physical processes and fundamental equations underlying all aspects of stellar astrophysics. The timely volume provides authoritative astronomical discussions as well as rigorous mathematical derivations and illuminating explanations of the physical concepts involved. In addition to traditional topics such as stellar interiors and atmospheres, the reader is introduced to stellar winds, mass accretion, nuclear astrophysics, weak interactions, novae, supernovae, pulsars, neutron stars and black holes. A concise introduction to general relativity is also included. At the end of each chapter, exercises and helpful hints are provided to test and develop the understanding of the student. As the first advanced textbook on stellar astrophysics for nearly three decades, this long-awaited volume provides a thorough introduction for graduate students and an up-to-date review for researchers.

In the past two decades, scientists have made remarkable progress in understanding stars. This graduate-level textbook provides a systematic, self-contained and lucid introduction to the physical processes and fundamental equations underlying all aspects of stellar astrophysics. The timely volume provides authoritative astronomical discussions as well as rigorous mathematical derivations and illuminating explanations of the physical concepts involved. In addition to traditional topics such as stellar interiors and atmospheres, the reader is introduced to stellar winds, mass accretion, nuclear astrophysics, weak interactions, novae, supernovae, pulsars, neutron stars and black holes. A concise introduction to general relativity is also included. At the end of each chapter, exercises and helpful hints are provided to test and develop the understanding of the student. As the first advanced textbook on stellar astrophysics for nearly three decades, this long-awaited volume provides a thorough introduction for graduate students and an up-to-date review for researchers.

Star-hopping--using easily seen bright stars to locate fainter celestial objects in the night sky--is a basic and essential technique for all star gazers, novice and veteran alike. Robert Garfinkle shows you how to locate the many stellar objects usually overlooked by the untrained eye. Two or more detailed star hops for each month of the year, which can be read in any order, take you on a trip through the night sky, opening new doors of discovery and reinforcing star-hopping methods and techniques. With Garfinkle's able guidance, learn to take the Messier Marathon--a night-long hop across the skies. Additional basic astronomy skills are carefully outlined, including reading star charts, finding celestial directions, understanding telescope types, and using light pollution filters. A lively history of the universe and the ancient myths and legends of the sky round out the text. This is an essential guide for sky gazers who want to get the most out of their evening sky explorations.

The study of AGN is one of the most dynamic areas of contemporary astronomy, involving one-fifth of all research astronomers. This textbook provides a systematic review of the observed properties of AGN across the entire electromagnetic spectrum, examines the underlying physics, and shows how the brightest AGN--quasars--can be used to probe the farthest reaches of the Universe. This timely textbook is a clear, comprehensive and self-contained introduction to active galactic nuclei (AGN)--for advanced undergraduates and graduate students in astronomy and physics.

The contentious history of the idea of the black hole-the most fascinating and bizarre celestial object in the heavens For more than half a century, physicists and astronomers engaged in heated dispute over the possibility of black holes in the universe. The weirdly alien notion of a space-time abyss from which nothing escapes-not even light-seemed to confound all logic. This engrossing book tells the story of the fierce black hole debates and the contributions of Einstein and Hawking and other leading thinkers who completely altered our view of the universe. Renowned science writer Marcia Bartusiak shows how the black hole helped revive Einstein's greatest achievement, the general theory of relativity, after decades during which it had been pushed into the shadows. Not until astronomers discovered such surprising new phenomena as neutron stars and black holes did the once-sedate universe transform into an Einsteinian cosmos, filled with sources of titanic energy that can be understood only in the light of relativity. This book celebrates the hundredth anniversary of general relativity, uncovers how the black hole really got its name, and recounts the scientists' frustrating, exhilarating, and at times humorous battles over the acceptance of one of history's most dazzling ideas.

This timely review provides a self-contained introduction to the mathematical theory of stationary black holes and a self-consistent exposition of the corresponding uniqueness theorems. The opening chapters examine the general properties of space-times admitting Killing fields and derive the Kerr-Newman metric. Strong emphasis is given to the geometrical concepts. The general features of stationary black holes and the laws of black hole mechanics are then reviewed. Critical steps towards the proof of the 'no-hair' theorem are then discussed, including the methods used by Israel, the divergence formulae derived by Carter, Robinson and others, and finally the sigma model identities and the positive mass theorem. The book is rounded off with an extension of the electro-vacuum uniqueness theorem to self-gravitating scalar fields and harmonic mappings. This volume provides a rigorous textbook for graduate students in physics and mathematics. It also offers an invaluable, up-to-date reference for researchers in mathematical physics, general relativity and astrophysics.

IAU symposium 165 'Compact Stars in Binaries' was held from 15 through 19 August 1994, as part of the 22nd General Assembly of the IAU in The Hague. The symposium, supported by IAU Commissions 35,37,44 and 48, and co-sponsored by Commission 42, was attended by about 400 to 500 participants. This symposium received support from: - The International Astronomical Union; - The Royal Netherlands Academy of Sciences; - The Netherlands Ministery of Education and Science; - The Leids Kerkhoven Bosscha Fonds; - The Stichting Fysica. The field of compact stars in binaries is one of the most active areas of present-day astrophysics. An absolute highlight of the last few years was the 1993 Nobel Prize of physics, awarded to Taylor and Hulse for their discovery of the binary pulsar PSR 1913+ 16, and the measurement of the orbital decay of this system due to the emission of gravitational waves. The aim of the organizers of the symposium was to present an overview of the most significant observational discoveries of the past decade, in com bination with a review of the most important theoretical developments. We were very happy that most of the world's leading experts in observation and theory were present at the symposium to review the various aspects of the subject. The contents of their oral presentations are now published in the form of these proceedings, which we expect to become an important source of reference for the coming years.

Is the current state of our Galaxy primarily the result of its initial conditions or is it the product of a lifetime of complex interactions with its environment? Gathered in this volume are papers presented at an international meeting in Granada (Spain) dedicated to exploring this fundamental question. This timely review examines all the key physical processes involved in the formation and evolution of the Milky Way. A dozen invited review articles by international experts summarise our understanding to date; whilst more than 50 topical research papers present the latest results. Together, these papers provide a state-of-the-art view on topical issues such as disk instabilities, large-scale star formation, large-scale structure formation in our Galaxy, chemical evolution, disk-halo feedback, the galactic globular cluster system, stellar populations, and the formation of galaxies. Also included are three panel sessions identifying key routes for critical future research. For graduate students and researchers, this volume provides a valuable and pertinent review of our new vision of the formation and evolution of our Galaxy.