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Author : G. Belvedere
Publisher : Springer Science & Business Media
Page : 301 pages
File Size : 48,9 Mb
Release : 2012-12-06
Category : Science
ISBN : 9789400924017
Proceeding of the European Physical Society Study Conference, held in Noto (Sicily), Italy, June 16-20, 1988
Author : F. Meyer,Wolfgang J. Duschl,Juhan Frank,Emmi Meyer-Hofmeister
Publisher : Springer Science & Business Media
Page : 471 pages
File Size : 46,6 Mb
Release : 2012-12-06
Category : Science
ISBN : 9789400910379
With the advent of space observatories and modern developments in ground based astronomy and concurrent progress in the theoretical understanding of these observations it has become clear that accretion of material on to compact objects is an ubiquitous mechanism powering very diverse astrophysical sources ranging in size and luminosity by many orders of magnitude. A problem common to these systems is that the material accreted must in general get rid of its angular momentum and this leads to the formation of an Accretion Disk which allows angular momentum re-distribution and converts potential energy into radiation with an efficiency which can be higher than the nuclear burning yield. These systems range in size from quasars and active galactic nuclei to accretion disks around forming stars and the early solar system and to compact binaries such as cataclysmic variables and low-mass X-ray binaries. Other objects that should be mentioned in this context are 88433, the black hole binary candidates, and possibly gamma-ray burst sources. Observations of these systems have provided important constraints for theoretical accretion disk models on widely differing scales, lumi nosities, mass-transfer rates and physical environments.
Author : S Kato
Publisher : CRC Press
Page : 354 pages
File Size : 46,7 Mb
Release : 1996
Category : Science
ISBN : UCSC:32106014788746
Advection-dominated disks are replacing the standard model, and this book provides the first extensive examination of their various aspects. Topics discussed include the global disk structure, thermal stability, two-temperature regimes, electron-positron pair production, disk spectra, the relation to the outburst behaviour of X-ray transients and hard-soft spectral transitions, the effects of radiation drag force, jet formation and possible nucleosynthesis in the advection-dominated disks. The papers also address some more fundamental issues concerning the basic physics of accretion disks, including the origin of disk viscosity, the observational appearance of the tidal instability. In cataclysmic variables, and the role of self-gravity of accretion disks in relation to stellar systems and to star/planet formation. This book will be required reading for any astronomer, cosmologist or astrophysicist seeking an up-to-date overview of this topic.
Author : Anonim
Publisher : Unknown
Page : 332 pages
File Size : 52,6 Mb
Release : 1996
Category : Accretion (Astrophysics)
ISBN : 9056000160
Handboek over de omgang met paarden.
Author : I︠A︡kov Borisovich Zelʹdovich,Aleksandr Andreevich Ruzmaĭkin,D. D. Sokoloff
Publisher : Taylor & Francis Group
Page : 392 pages
File Size : 49,5 Mb
Release : 1983
Category : Science
ISBN : UCAL:B4154537
Author : C. BERTOUT (Ed)
Publisher : Atlantica Séguier Frontières
Page : 600 pages
File Size : 53,5 Mb
Release : 1991
Category : Accretion (Astrophysics)
ISBN : 2863320939
Author : Marek A. Abramowicz,Gunnlaugur Björnsson,James E. Pringle
Publisher : Cambridge University Press
Page : 310 pages
File Size : 47,5 Mb
Release : 1998
Category : Science
ISBN : 0521623626
The first comprehensive and up-to-date review of our new understanding of accretion disks around black holes - with chapters from experts from around the world.
Author : Ana I. Gómez de Castro,Mark Heyer,Enrique Vázquez-Semadeni,Rafael Rebolo,Michel Tagger,Ralph E. Pudritz
Publisher : Springer
Page : 0 pages
File Size : 43,5 Mb
Release : 2011-09-17
Category : Science
ISBN : 9048166020
Magnetic Fields play a key role in the physics of star formation on all scales: from the formation of the large complexes of molecular clouds to the formation of solar-like planetary systems. The plasma physics involved is non-linear and very complex, which requires the development of large numerical codes. An additional difficulty is that the detection and study of magnetic fields is not easy from an observational point of view, and therefore theoretical models cannot easily be constrained. In the week from April 21st to 25th in 2003, a meeting was held on the Campus of the Universidad Complutense de Madrid (Spain) to join theoretical and observational efforts to address these issues. The objective was to define a set of relevant problems for the physics of star formation that can be properly addressed with the current or near-future instruments. This book summarizes the results of this intensive week of work. The book is written in a comprehensive manner and reviews our current knowledge of the subject. It also represents an updated account of the ideas and thoughts of the scientists working in the field of Star Formation. The contributions are presented in six chapters which correspond to the six fundamental issues (sessions) on which the discussion was focused during the workshop: the physics of turbulence in the Interstellar Medium (ISM), the formation of structure in the ISM, the formation of stars within dense cores of molecular gas, the physics of accretion disks, the physics of outflows and their interaction with the ISM, and the interaction between the stellar magnetosphere and accretion disk. Each chapter starts with a comprehensive summary written by one of the editors, which includes input from the contributions as well as the editor's own thoughts on the subject. For all these reasons the book is well-suited as a primer to introduce graduate students in the richness of this field of research.
Author : R. Beck,P.P. Kronberg,R. Wielebinski
Publisher : Springer Science & Business Media
Page : 582 pages
File Size : 52,9 Mb
Release : 1990-04-30
Category : Science
ISBN : 0792307046
This Symposium, the first devoted entirely to the measurement and the role of magnetic fields in the non-solar Universe, was held in Heidelberg, on June 19-23, 1989. The meeting began with review talks on magnetic phenomena near the solar photosphere, corona, and in stellar winds, since these nearby "laboratories", studied for many years, provide much of the prior knowl edge of magnetic effects in astrophysical plasmas. The Symposium contained presentations of considerable new work concerning the role of magnetic fields in accretion disks, bipolar outflows, and related magnetic phenomena in molecular clouds and star forming regions. Both observa tions and related theory of the large-scale magnetic fields in the Milky Way were covered, in addition to a session on the more general theme of magnetohydrodynamics of galactic magnetic fields. Dynamo mechanisms were discussed in considerable detail. It was apparent that recent observational data on polarized emission from external galaxies are now of sufficiently high quality that meaningful tests of large-scale field amplification, and of ideas on the origin of galactic magnetic fields, can be undertaken. Both new observations and numerical simulation work were described in the context of active galaxy nuclei, supernova remnants, radio source jets and extended lobes, and also in the environment of galaxy clusters. Recent large-scale computer simulations incorporating magnetic fields in star formation, radio source jets, and many other phenomena were presented, and much of this was very new.
Author : Mario Vietri
Publisher : University of Chicago Press
Page : 575 pages
File Size : 44,8 Mb
Release : 2008-09-15
Category : Science
ISBN : 9780226855714
Written by one of today’s most highly respected astrophysicists, Foundations of High-Energy Astrophysics is an introduction to the mathematical and physical techniques used in the study of high-energy astrophysics. Here, Mario Vietri approaches the basics of high-energy astrophysics with an emphasis on underlying physical processes as opposed to a more mathematical approach. Alongside more traditional topics, Vietri presents new subjects increasingly considered crucial to understanding high-energy astrophysical sources, including the electrodynamics of cosmic sources, new developments in the theory of standard accretion disks, and the physics of coronae, thick disks, and accretion onto magnetized objects. The most thorough and engaging survey of high-energy astrophysics available today, Foundations of High-Energy Astrophysics introduces the main physical processes relevant to the field in a rigorous yet accessible way, while paying careful attention to observational issues. Vietri’s book will quickly become a classic text for students and active researchers in astronomy and astrophysics. Those in adjoining fields will also find it a valuable addition to their personal libraries.
Author : Wolfgang J. Duschl,Juhan Frank,F. Meyer,Emmi Meyer-Hofmeister,Werner M. Tscharnuter
Publisher : Springer Science & Business Media
Page : 417 pages
File Size : 45,7 Mb
Release : 2012-12-06
Category : Science
ISBN : 9789401108584
Accretion disks in astrophysics represent the characteristic flow by which compact bodies accrete mass from their environment. Their intrinsically high luminosity, and recent progress in observational accessibility at all wavelength bands, have led to rapidly growing awareness of their importance and made them the object of intense research on widely different scales, ranging from binary stars to young stellar objects and active galactic nuclei. This book contains the proceedings of the NATO Advanced Workshop on `Theory of Accretion Disks 2' for which some of the most active researchers in the different fields came together at the Max-Planck-Institut for Astrophysics in Garching in March, 1993. Its reviews and contributions give an up-to-date account of the present status of our understanding and provide a stimulating challenge in discussions of open questions in a rapidly developing field.
Author : Gerhard Klare
Publisher : Springer Science & Business Media
Page : 378 pages
File Size : 51,7 Mb
Release : 2012-12-06
Category : Science
ISBN : 9783642762383
In order to bring the scientific events of the meetings of the Astronomische Gesellschaft (AG) to the attention of the worldwide astronomical community, an annual publication, Reviews in Modern Astronomy, was established. It is devoted exclusively to . the invited reviews, the Karl Schwarz schild lectures, and the high light contributions from leading scientists reporting on recent progress and scientific achievements at their respective institutes. This third volume continues the yearbook series of publications of the society. It comprises the complete set of contributions presented during the spring meeting of the AG at Berlin in March 1990, which was dedicated to the topic "Accretion and Winds". In addition four latecomers (two review and two highlight papers) delivered at the fall meeting at Graz, Austria in September 1989 close this volume. Heidelberg, September 1990 G: Klare Contents Some New Elements in Accretion Disk Theory By F. Meyer (With 5 Figures) . . . . . . . . . . . . . . . . . . . . . . . 1 Mass Transfer and Evolution in Close Binaries By A. R. King (With 4 Figures) . . . . . . . . . . . . . . . . . . . . . . . 14 Radiation Hydrodynamics of the Boundary Layer of Accretion Disks in Cataclysmic Variables By W. Kley (With 6 Figures) . . . . . . . . . . . . . . . . . . . . . . . . 21 Curious Observations of Cataclysmic Variables By F. V. Hessman (With 10 Figures) . . . . . . . . . . . . . . . . . . . 32 Accretion in AM Herculis Stars 44 By A. D. Schwope (With 12 Figures) X-ray Diagnostics of Accretion Disks By G. Hasinger (With 12 Figures) . . . . . . . . . . . . . . . . . . . . . 60 Accretion Phenomena at Neutron Stars By A. Rebetzky, H. Herold, U. Kraus, H. -P. Nollert, and H. Ruder (With 13 Figures) . . . . . . . . . . . . . . . . . . . . . .
Author : Pranab Ghosh
Publisher : World Scientific
Page : 793 pages
File Size : 42,7 Mb
Release : 2007
Category : Science
ISBN : 9789810247447
This book is an introduction to pulsars, a key area in high energy astrophysics with continuing potential for fundamental discoveries. Throughout the book runs the unifying thread of the evolutionary link between rotation-powered pulsars and accretion-powered pulsars ? a milestone of modern astrophysics. Early textbooks on pulsars dealt almost entirely with rotation-powered ones, while accounts of pulsars in volumes on X-ray binaries focused almost exclusively on accretion-powered ones. This is the first textbook to treat these two kinds of pulsars simultaneously with equal importance, stressing the fact that both are rotating, magnetic neutron stars, operating under different conditions during different parts of their lives. It describes the observational properties of both kinds of pulsars, summarizes our physical understanding of these properties, and pays detailed attention to the physics of superdense matter which neutron stars are composed of, as well as to the superfluidity which is expected to occur in neutron stars. Evolution from rotation-power to accretion-power, and vice versa, are carefully described. The effects of the strong magnetic fields of neutron stars on themselves, their emission properties, and their environments are discussed, as are the origin and evolution of such magnetic fields. Also treated is the superbly accurate verification of Einstein's theory of general relativity through timing studies of binary pulsars, which led to the award of the Nobel Prize to Hulse and Taylor in 1993. On each topic, the book starts with simple, basic physical concepts, and builds up the exposition to the point where the latest and most exciting developments become accessible to the reader.
Author : Nikolay Shakura
Publisher : Springer
Page : 419 pages
File Size : 41,8 Mb
Release : 2018-10-03
Category : Science
ISBN : 9783319930091
This book highlights selected topics of standard and modern theory of accretion onto black holes and magnetized neutron stars. The structure of stationary standard discs and non-stationary viscous processes in accretion discs are discussed to the highest degree of accuracy analytic theory can provide, including relativistic effects in flat and warped discs around black holes. A special chapter is dedicated to a new theory of subsonic settling accretion onto a rotating magnetized neutron star. The book also describes supercritical accretion in quasars and its manifestation in lensing events. Several chapters cover the underlying physics of viscosity in astrophysical discs with some important aspects of turbulent viscosity generation. The book is aimed at specialists as well as graduate students interested in the field of theoretical astrophysics.
Author : Richard Wielebinski,Rainer Beck
Publisher : Springer Science & Business Media
Page : 306 pages
File Size : 45,8 Mb
Release : 2005-09-13
Category : Science
ISBN : 3540241752
While magnetic fields permeate the universe on all scales, the present book is dedicated to their investigation on the largest scales and affords a balanced account of both theoretical and observational aspects. Written as a set of advanced lectures and tutorial reviews that lead up to the forefront of research, this book offers both a modern source of reference for the experienced researchers as well as a high-level introductory text for postgraduate students and nonspecialist researchers working in related areas.