Disc Winds Matter

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Disc Winds Matter

Author : James Matthews
Publisher : Springer
ISBN 13 : 3319591835
Total Pages : 210 pages
Book Rating : 4.3/5 (195 download)

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Book Synopsis Disc Winds Matter by : James Matthews

Download or read book Disc Winds Matter written by James Matthews and published by Springer. This book was released on 2017-08-01 with total page 210 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis describes the application of a Monte Carlo radiative transfer code to accretion disc winds in two types of systems spanning 9 orders of magnitude in mass and size. In both cases, the results provide important new insights. On small scales, the presence of disc winds in accreting white dwarf binary systems has long been inferred from the presence of ultraviolet absorption lines. Here, the thesis shows that the same winds can also produce optical emission lines and a recombination continuum. On large scales, the thesis constructs a simple model of disc winds in quasars that is capable of explaining both the observed absorption and emission signatures – a crucial advance that supports a disc-wind based unification scenario for quasars. Lastly, the thesis also includes a theoretical investigation into the equivalent width distribution of the emission lines in quasars, which reveals a major challenge to all unification scenarios.

Magnetohydrodynamics in Binary Stars

Author : C. G. Campbell
Publisher : Springer
ISBN 13 : 331997646X
Total Pages : 474 pages
Book Rating : 4.3/5 (199 download)

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Book Synopsis Magnetohydrodynamics in Binary Stars by : C. G. Campbell

Download or read book Magnetohydrodynamics in Binary Stars written by C. G. Campbell and published by Springer. This book was released on 2018-10-13 with total page 474 pages. Available in PDF, EPUB and Kindle. Book excerpt: Magnetism in binary stars is an area of central importance in stellar astrophysics. The second edition of "Magnetohydrodynamics in Binary Stars" is a major revision of the first edition. The material has been updated and extended, including additional chapters on the origins of the stellar magnetic fields and accretion disc magnetic winds. A comprehensive account is given of the subject, from the early work up to the latest results. The unifying theme remains the redistribution of angular momentum by magnetic stresses. This occurs in a wide variety of ways, including magnetic stellar and orbital coupling, magnetic channelling of accretion streams, magnetic stellar coupling to accretion discs, dynamo field coupling in discs, and magnetic stellar and disc winds. The associated stellar spin and orbital evolution problems, including stability, are also considered. Although the main focus is on binary stars, much of the work on accretion discs and wind flows has more general astrophysical relevance. Convenient formulae are included that can be compared to observations, making the book useful to observers as well as theorists, and there are extensive reference lists. The material is mainly aimed at research workers, but parts of the text could be useful for postgraduate courses in magnetic stellar astrophysics topics.

Accretion Flows in Astrophysics

Author : Nikolay Shakura
Publisher : Springer
ISBN 13 : 3319930095
Total Pages : 419 pages
Book Rating : 4.3/5 (199 download)

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Book Synopsis Accretion Flows in Astrophysics by : Nikolay Shakura

Download or read book Accretion Flows in Astrophysics written by Nikolay Shakura and published by Springer. This book was released on 2018-10-03 with total page 419 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.

Magnetohydrodynanics in Binary Stars

Author : C.G. Campbell
Publisher : Springer Science & Business Media
ISBN 13 : 9781402003776
Total Pages : 324 pages
Book Rating : 4.0/5 (37 download)

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Book Synopsis Magnetohydrodynanics in Binary Stars by : C.G. Campbell

Download or read book Magnetohydrodynanics in Binary Stars written by C.G. Campbell and published by Springer Science & Business Media. This book was released on 2001-11-30 with total page 324 pages. Available in PDF, EPUB and Kindle. Book excerpt: Magnetic stresses were discussed as a possible means of angular momentum transport in the development of accretion disc theory, in the late sixties and early seventies. Interest in the role of magnetic fields in close binary stars steadily increased after the discovery of the nature of AM Herculis in 1976. The observed lack of an accretion disc and the synchronous rotation of the white dwarf suggested strong magnetic effects, consistent with the high degree of optical polarization. Similar systems were soon discovered. Evidence for large magnetic fields was subsequently found in the X-ray binary pulsars and the intermediate polar binaries, both believed to include systems with partially disrupted accretion discs. A magnetically channelled wind from the main sequence secondary star has been invoked to explain the higher mass transfer rates observed in binaries above the period gap, and in an explanation of the gap. Magnetically influenced winds from accretion discs have been suggested as contributing to the inflow by removing angular momentum. Magnetism in binary stars is now an area of central importance in stellar astrophysics. Magnetic fields are believed to playa fundamental role even in apparently non-magnetic binaries. They provide the most viable means, through shear instabilities, of generating the turbulence in accretion discs necessary to drive the inflow via the resulting magnetic and viscous stresses.

Handbook of X-ray and Gamma-ray Astrophysics

Author : Cosimo Bambi
Publisher : Springer Nature
ISBN 13 : 9811969604
Total Pages : 5912 pages
Book Rating : 4.8/5 (119 download)

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Book Synopsis Handbook of X-ray and Gamma-ray Astrophysics by : Cosimo Bambi

Download or read book Handbook of X-ray and Gamma-ray Astrophysics written by Cosimo Bambi and published by Springer Nature. This book was released on with total page 5912 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Clumping in Hot-star Winds

Author : Wolf-Rainer Hamann
Publisher : Universitätsverlag Potsdam
ISBN 13 : 3940793337
Total Pages : 262 pages
Book Rating : 4.9/5 (47 download)

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Book Synopsis Clumping in Hot-star Winds by : Wolf-Rainer Hamann

Download or read book Clumping in Hot-star Winds written by Wolf-Rainer Hamann and published by Universitätsverlag Potsdam. This book was released on 2008 with total page 262 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Compact Stellar X-ray Sources

Author : Walter Lewin
Publisher : Cambridge University Press
ISBN 13 : 1139451774
Total Pages : 667 pages
Book Rating : 4.1/5 (394 download)

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Book Synopsis Compact Stellar X-ray Sources by : Walter Lewin

Download or read book Compact Stellar X-ray Sources written by Walter Lewin and published by Cambridge University Press. This book was released on 2006-04-06 with total page 667 pages. Available in PDF, EPUB and Kindle. Book excerpt: X-ray astronomy is the prime available window on astrophysical compact objects: black holes, neutron stars and white dwarfs. In this book, prominent experts provide a comprehensive overview of the observations and astrophysics of these objects. This is a valuable reference for graduate students and active researchers.

Introduction to Stellar Winds

Author : Henny J. G. L. M. Lamers
Publisher : Cambridge University Press
ISBN 13 : 9780521595650
Total Pages : 456 pages
Book Rating : 4.5/5 (956 download)

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Book Synopsis Introduction to Stellar Winds by : Henny J. G. L. M. Lamers

Download or read book Introduction to Stellar Winds written by Henny J. G. L. M. Lamers and published by Cambridge University Press. This book was released on 1999-06-17 with total page 456 pages. Available in PDF, EPUB and Kindle. Book excerpt: The first comprehensive introduction to the observations and theories of stellar winds; a long-awaited graduate textbook, written by two founders of the field.

Protostars and Planets VI

Author : Henrik Beuther
Publisher : University of Arizona Press
ISBN 13 : 0816598762
Total Pages : 945 pages
Book Rating : 4.8/5 (165 download)

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Book Synopsis Protostars and Planets VI by : Henrik Beuther

Download or read book Protostars and Planets VI written by Henrik Beuther and published by University of Arizona Press. This book was released on 2014-12-18 with total page 945 pages. Available in PDF, EPUB and Kindle. Book excerpt: The revolutionary discovery of thousands of confirmed and candidate planets beyond the solar system brings forth the most fundamental question: How do planets and their host stars form and evolve? Protostars and Planets VI brings together more than 250 contributing authors at the forefront of their field, conveying the latest results in this research area and establishing a new foundation for advancing our understanding of stellar and planetary formation. Continuing the tradition of the Protostars and Planets series, this latest volume uniquely integrates the cross-disciplinary aspects of this broad field. Covering an extremely wide range of scales, from the formation of large clouds in our Milky Way galaxy down to small chondrules in our solar system, Protostars and Planets VI takes an encompassing view with the goal of not only highlighting what we know but, most importantly, emphasizing the frontiers of what we do not know. As a vehicle for propelling forward new discoveries on stars, planets, and their origins, this latest volume in the Space Science Series is an indispensable resource for both current scientists and new students in astronomy, astrophysics, planetary science, and the study of meteorites.

The Environments of the Sun and the Stars

Author : Jean-Pierre Rozelot
Publisher : Springer
ISBN 13 : 3642306489
Total Pages : 255 pages
Book Rating : 4.6/5 (423 download)

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Book Synopsis The Environments of the Sun and the Stars by : Jean-Pierre Rozelot

Download or read book The Environments of the Sun and the Stars written by Jean-Pierre Rozelot and published by Springer. This book was released on 2012-08-17 with total page 255 pages. Available in PDF, EPUB and Kindle. Book excerpt: Based on lectures given at a CNRS summer school in France, this book covers many aspects of stellar environments (both observational and theoretical) and offers a broad overview of the field. More specifically, Part I of the book focuses on the Sun, the properties of the ejected plasma, of the solar wind and on space weather. The second part deals with tides in planetary systems and in binary stellar systems, as well as with interactions in massive binary stars as seen by interferometry. Finally the chapters of Part III discuss the environments of young or evolved stars, stellar winds, agnetic fields and disks. With its broad approach the book will provide advanced students as well as researchers with a good overview of the environments of the Sun and the stars.

Cyclical Variability in Stellar Winds

Author : Lex Kaper
Publisher : Springer Science & Business Media
ISBN 13 : 3540685979
Total Pages : 426 pages
Book Rating : 4.5/5 (46 download)

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Book Synopsis Cyclical Variability in Stellar Winds by : Lex Kaper

Download or read book Cyclical Variability in Stellar Winds written by Lex Kaper and published by Springer Science & Business Media. This book was released on 2013-06-05 with total page 426 pages. Available in PDF, EPUB and Kindle. Book excerpt: It is well known that stellar winds are variable, and the fluctuations are often cyclical in nature. This property seems to be shared by the winds of cool and hot stars, even though their outflows are driven by fundamentally different physical mechanisms. Since very similar models have been proposed to explain the cyclical wind variations observed in a wide variety of stars, the time was ripe for astrophysicists from many different sub-disciplines to present the state of the art in a concise form. The proceedings will provide a useful, up-to-date overview of the observations, interpretation, and modelling of the time-dependent mass outflows from all sorts of stars.

Energy in Physics, War and Peace

Author : Hans Mark
Publisher : Springer Science & Business Media
ISBN 13 : 9400930313
Total Pages : 394 pages
Book Rating : 4.4/5 (9 download)

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Book Synopsis Energy in Physics, War and Peace by : Hans Mark

Download or read book Energy in Physics, War and Peace written by Hans Mark and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 394 pages. Available in PDF, EPUB and Kindle. Book excerpt: Writing even in overview of more than a half-century of professional life of a giant of twentieth century science and technology such as Edward Teller is a daunting task. We ask in advance the reader's pardon for passing over quickly or omitting entirely aspects of Teller's life and work which may seem of major significance but which we, due to differences of perspective or knowledge, speak too little or not at all. We refer those interested in greater depth to the excellent biography by Stanley Blumberg and Gwen Owens, The Life and Times of Edward Teller, and we have (with his permission) printed Professor Eugene Wigner's An Appreciation On the 60th Birthday of Edward Teller immediately after this foreword, so that the reader may consider the perspective of one of Teller's most illustrious contemporaries more than two decades ago. Edward Teller was born in Budapest, Hungary on January 15,1908. While his childhood was spent in the twilight of the Victorian age and its abrupt conclusion in the Great War and his youth in its especially turbulent after math in central Europe, he doesn't bear visible scars from it.

Cosmic Plasmas and Electromagnetic Phenomena

Author : Athina Meli
Publisher : MDPI
ISBN 13 : 3039214659
Total Pages : 264 pages
Book Rating : 4.0/5 (392 download)

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Book Synopsis Cosmic Plasmas and Electromagnetic Phenomena by : Athina Meli

Download or read book Cosmic Plasmas and Electromagnetic Phenomena written by Athina Meli and published by MDPI. This book was released on 2019-10-25 with total page 264 pages. Available in PDF, EPUB and Kindle. Book excerpt: During the past few decades, plasma science has witnessed a great growth in laboratory studies, in simulations, and in space. Plasma is the most common phase of ordinary matter in the universe. It is a state in which ionized matter (even as low as 1%) becomes highly electrically conductive. As such, long-range electric and magnetic fields dominate its behavior. Cosmic plasmas are mostly associated with stars, supernovae, pulsars and neutron stars, quasars and active galaxies at the vicinities of black holes (i.e., their jets and accretion disks). Cosmic plasma phenomena can be studied with different methods, such as laboratory experiments, astrophysical observations, and theoretical/computational approaches (i.e., MHD, particle-in-cell simulations, etc.). They exhibit a multitude of complex magnetohydrodynamic behaviors, acceleration, radiation, turbulence, and various instability phenomena. This Special Issue addresses the growing need of the plasma science principles in astrophysics and presents our current understanding of the physics of astrophysical plasmas, their electromagnetic behaviors and properties (e.g., shocks, waves, turbulence, instabilities, collimation, acceleration and radiation), both microscopically and macroscopically. This Special Issue provides a series of state-of-the-art reviews from international experts in the field of cosmic plasmas and electromagnetic phenomena using theoretical approaches, astrophysical observations, laboratory experiments, and state-of-the-art simulation studies.

The Molecular Astrophysics of Stars and Galaxies

Author : T. W. Hartquist
Publisher : Oxford University Press
ISBN 13 : 9780198501589
Total Pages : 562 pages
Book Rating : 4.5/5 (15 download)

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Book Synopsis The Molecular Astrophysics of Stars and Galaxies by : T. W. Hartquist

Download or read book The Molecular Astrophysics of Stars and Galaxies written by T. W. Hartquist and published by Oxford University Press. This book was released on 1998 with total page 562 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a comprehensive survey of modern molecular astrophysics. It includes an introduction to molecular spectroscopy and then addresses the main areas of current molecular astrophysics, including galaxy formation, star forming regions, mass loss from young as well as highlyevolved stars and supernovae, starburst galaxies plus the tori and discs near the central engines of active galactic nuclei. All chapters have been written by invited authors who are acknowledged experts in their fields. The thorough editorial process has ensured a uniformly high standard ofexposition and a coherent style. The book is unique in giving a detailed view of its wide-ranging subject. It will provide the standard introduction for research students in molecular astrophysics. The book will be read by research astronomers and astrophysicists who wish to broaden the basis oftheir knowledge or are moving their activities into this burgeoning field. It will enable chemists to learn the astrophysics most related to chemistry as well as instruct physicists about the molecular processes most important in astronomy.

Multi-scale Dynamical Processes in Space and Astrophysical Plasmas

Author : Manfred P. Leubner
Publisher : Springer Science & Business Media
ISBN 13 : 3642304419
Total Pages : 230 pages
Book Rating : 4.6/5 (423 download)

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Book Synopsis Multi-scale Dynamical Processes in Space and Astrophysical Plasmas by : Manfred P. Leubner

Download or read book Multi-scale Dynamical Processes in Space and Astrophysical Plasmas written by Manfred P. Leubner and published by Springer Science & Business Media. This book was released on 2012-08-01 with total page 230 pages. Available in PDF, EPUB and Kindle. Book excerpt: Magnetized plasmas in the universe exhibit complex dynamical behavior over a huge range of scales. The fundamental mechanisms of energy transport, redistribution and conversion occur at multiple scales. The driving mechanisms often include energy accumulation, free-energy-excited relaxation processes, dissipation and self-organization. The plasma processes associated with energy conversion, transport and self-organization, such as magnetic reconnection, instabilities, linear and nonlinear waves, wave-particle interactions, dynamo processes, turbulence, heating, diffusion and convection represent fundamental physical effects. They demonstrate similar dynamical behavior in near-Earth space, on the Sun, in the heliosphere and in astrophysical environments. 'Multi-scale Dynamical Processes in Space and Astrophysical Plasmas' presents the proceedings of the International Astrophysics Forum Alpbach 2011. The contributions discuss the latest advances in the exploration of dynamical behavior in space plasmas environments, including comprehensive approaches to theoretical, experimental and numerical aspects. The book will appeal to researchers and students in the fields of physics, space and astrophysics, solar physics, geophysics and planetary science.

Stellar Populations

Author : International Astronomical Union. Symposium
Publisher : Cambridge University Press
ISBN 13 : 9780521764841
Total Pages : 488 pages
Book Rating : 4.7/5 (648 download)

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Book Synopsis Stellar Populations by : International Astronomical Union. Symposium

Download or read book Stellar Populations written by International Astronomical Union. Symposium and published by Cambridge University Press. This book was released on 2010 with total page 488 pages. Available in PDF, EPUB and Kindle. Book excerpt: IAU Symposium 262 presents reviews on the current understanding of the theories of stellar evolution, galaxy formation and galaxy evolution. It emphasises what we have learned in the past few years from massive surveys covering large portions of the sky (e.g. SDSS, HDF, UDF, GOODS, COSMOS). Several critical aspects of research on stellar populations deserve further effort in order to be brought in tune with other areas of astrophysical research. The next ten years will see the opening of major observatories that will increase the quality and quantity of astronomical data by orders of magnitude. The expected benefits from these instruments for the study of stellar populations are explored. This critical review of state of the art observational and theoretical work will appeal to all those working on stellar populations, from distant galaxies to local resolved galaxies and galactic star clusters.

High Energy Astrophysics

Author : Malcolm S. Longair
Publisher : Cambridge University Press
ISBN 13 : 1139494546
Total Pages : 885 pages
Book Rating : 4.1/5 (394 download)

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Book Synopsis High Energy Astrophysics by : Malcolm S. Longair

Download or read book High Energy Astrophysics written by Malcolm S. Longair and published by Cambridge University Press. This book was released on 2011-02-03 with total page 885 pages. Available in PDF, EPUB and Kindle. Book excerpt: Providing students with an in-depth account of the astrophysics of high energy phenomena in the Universe, the third edition of this well-established textbook is ideal for advanced undergraduate and beginning graduate courses in high energy astrophysics. Building on the concepts and techniques taught in standard undergraduate courses, this textbook provides the astronomical and astrophysical background for students to explore more advanced topics. Special emphasis is given to the underlying physical principles of high energy astrophysics, helping students understand the essential physics. The third edition has been completely rewritten, consolidating the previous editions into one volume. It covers the most recent discoveries in areas such as gamma-ray bursts, ultra-high energy cosmic rays and ultra-high energy gamma rays. The topics have been rearranged and streamlined to make them more applicable to a wide range of different astrophysical problems.