Turbulence And Magnetic Fields In Astrophysics

Author : Edith Falgarone,Thierry Passot
Publisher : Springer
Page : 468 pages
File Size : 48,7 Mb
Release : 2008-01-11
Category : Science
ISBN : 9783540362388

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Turbulence and Magnetic Fields in Astrophysics by Edith Falgarone,Thierry Passot Pdf

This book contains review articles of most of the topics addressed at the conf- ence on Simulations of Magnetohydrodynamic turbulence in astrophysics: recent achievements and perspectives which took place from July 2 to 6, 2001 at the Institut Henri Poincar ́e in Paris. We made the choice to publish these lectures in a tutorial form so that they can be read by a broad audience. As a result, this book does not give an exhaustive view of all the subjects addressed during the conference. The main objective of this workshop which gathered about 90 scientists from di?erent ?elds, was to present and confront recent results on the topic of t- bulence in magnetized astrophysical environments. A second objective was to discuss the latest generation of numerical codes, such as those using adaptive mesh re?nement (AMR) techniques. During a plenary discussion at the end of the workshop discussions were held on several topics, often at the heart of vivid controversies. Topics included the timescale for the dissipation of magneto-hydrodynamical (MHD) turbulence, the role of boundary conditions, the characteristics of imbalanced turbulence, the validity of the polytropic approach to Alfv ́en waves support within interst- lar clouds, the source of turbulence inside clouds devoid of stellar activity, the timescale for star formation, the Alfv ́en Mach number of interstellar gas motions, the formation process for helical ?elds in the interstellar medium. The impact of small upon large scales was also discussed.

Author : Alexander Lazarian,Elisabete M. de Gouveia Dal Pino,Claudio Melioli
Publisher : Springer
Page : 623 pages
File Size : 46,8 Mb
Release : 2014-11-14
Category : Science
ISBN : 9783662446256

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Magnetic Fields in Diffuse Media by Alexander Lazarian,Elisabete M. de Gouveia Dal Pino,Claudio Melioli Pdf

This volume presents the current knowledge of magnetic fields in diffuse astrophysical media. Starting with an overview of 21st century instrumentation to observe astrophysical magnetic fields, the chapters cover observational techniques, origin of magnetic fields, magnetic turbulence, basic processes in magnetized fluids, the role of magnetic fields for cosmic rays, in the interstellar medium and for star formation. Written by a group of leading experts the book represents an excellent overview of the field. Nonspecialists will find sufficient background to enter the field and be able to appreciate the state of the art.

Author : Edith Falgarone,Thierry Passot
Publisher : Springer
Page : 468 pages
File Size : 49,8 Mb
Release : 2003-03-11
Category : Science
ISBN : 354000274X

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Turbulence and Magnetic Fields in Astrophysics by Edith Falgarone,Thierry Passot Pdf

This book contains review articles of most of the topics addressed at the conf- ence on Simulations of Magnetohydrodynamic turbulence in astrophysics: recent achievements and perspectives which took place from July 2 to 6, 2001 at the Institut Henri Poincar ́e in Paris. We made the choice to publish these lectures in a tutorial form so that they can be read by a broad audience. As a result, this book does not give an exhaustive view of all the subjects addressed during the conference. The main objective of this workshop which gathered about 90 scientists from di?erent ?elds, was to present and confront recent results on the topic of t- bulence in magnetized astrophysical environments. A second objective was to discuss the latest generation of numerical codes, such as those using adaptive mesh re?nement (AMR) techniques. During a plenary discussion at the end of the workshop discussions were held on several topics, often at the heart of vivid controversies. Topics included the timescale for the dissipation of magneto-hydrodynamical (MHD) turbulence, the role of boundary conditions, the characteristics of imbalanced turbulence, the validity of the polytropic approach to Alfv ́en waves support within interst- lar clouds, the source of turbulence inside clouds devoid of stellar activity, the timescale for star formation, the Alfv ́en Mach number of interstellar gas motions, the formation process for helical ?elds in the interstellar medium. The impact of small upon large scales was also discussed.

Author : Siyao Xu
Publisher : Springer
Page : 157 pages
File Size : 45,6 Mb
Release : 2019-04-23
Category : Science
ISBN : 9789811375156

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Study on Magnetohydrodynamic Turbulence and Its Astrophysical Applications by Siyao Xu Pdf

Turbulence and magnetic fields are ubiquitous in the Universe. Their importance to astronomy cannot be overestimated. The theoretical advancements in magnetohydrodynamic (MHD) turbulence achieved during the past two decades have significantly influenced many fields of astronomy. This book provides predictive theories of the magnetic field generation by turbulence and the dissipation of MHD turbulence. These fundamental non-linear problems were believed to be tractable only numerically. This book provides complete analytical descriptions in quantitative agreement with existing numerics, as well as theoretical predictions in physical regimes still unreachable by simulations, and explanations of various related observations. It also discusses and promotes the astrophysical applications of MHD turbulence theories, including (i) the particle acceleration and radiation in high-energy phenomena, e.g., Gamma-Ray Bursts, supernova remnants, cosmic rays; (ii) interstellar density fluctuations and the effect on observations, e.g., Faraday rotation, scattering measurements of Galactic and extragalactic radio sources; (iii) density and magnetic field structure in molecular clouds toward star formation. In closing, this book demonstrates the key role of MHD turbulence in connecting diverse astrophysical processes and unraveling long-standing astrophysical problems, as foreseen by Chandrasekhar, a founder of modern astrophysics.

Author : Wolfram Schmidt
Publisher : Springer Science & Business Media
Page : 90 pages
File Size : 45,7 Mb
Release : 2013-09-20
Category : Science
ISBN : 9783319014753

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Numerical Modelling of Astrophysical Turbulence by Wolfram Schmidt Pdf

In this "SpringerBrief" the author considers the underlying problems and questions that are common to numerical models of turbulence in different astrophysical systems. Turbulence has emerged as an important research topic in several areas of astrophysics. Understanding and modeling turbulence is particularly important for the dynamics of the interstellar medium, but also for the intergalactic medium, as well as in stars. The advancement of methods for numerical simulations of astrophysical turbulence, however, is still challenging because of gravity, strong compressibility, magnetic fields, and other effects. The book begins with a review of general aspects of numerical simulations of turbulence. In the main part the author presents findings from his numerical studies on astrophysical turbulence and discusses the astrophysical implications. He also explains in detail the numerical schemes utilized. Readers will find that this book offers a compact yet comprehensive introduction.

Author : José Franco,Alberto Carraminana
Publisher : Cambridge University Press
Page : 304 pages
File Size : 44,9 Mb
Release : 1999-05-28
Category : Science
ISBN : 052165131X

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Interstellar Turbulence by José Franco,Alberto Carraminana Pdf

This timely volume presents a series of review articles covering every aspect of interstellar turbulence--from accretion disks, molecular clouds, atomic and ionized media, through to spiral galaxies - based on a major international conference held in Mexico City.With advances in observational techniques and the development of more efficient computer codes and faster computers, research in this area has made spectacular progress in recent years. This book provides a comprehensive overview of the most important developments in observing and modelling turbulent flows in the cosmos. It provides graduate student and researchers with a state-of-the-art summary of observational, theoretical and computational research in interstellar turbulence.

Author : Dieter Biskamp
Publisher : Cambridge University Press
Page : 313 pages
File Size : 53,5 Mb
Release : 2003-07-31
Category : Science
ISBN : 9781139441674

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Magnetohydrodynamic Turbulence by Dieter Biskamp Pdf

This book presents an introduction to, and modern account of, magnetohydrodynamic (MHD) turbulence, an active field both in general turbulence theory and in various areas of astrophysics. The book starts by introducing the MHD equations, certain useful approximations and the transition to turbulence. The second part of the book covers incompressible MHD turbulence, the macroscopic aspects connected with the different self-organization processes, the phenomenology of the turbulence spectra, two-point closure theory, and intermittency. The third considers two-dimensional turbulence and compressible (in particular, supersonic) turbulence. Because of the similarities in the theoretical approach, these chapters start with a brief account of the corresponding methods developed in hydrodynamic turbulence. The final part of the book is devoted to astrophysical applications: turbulence in the solar wind, in accretion disks, and in the interstellar medium. This book is suitable for graduate students and researchers working in turbulence theory, plasma physics and astrophysics.

Author : Loukas Vlahos,Peter Cargill
Publisher : Springer
Page : 325 pages
File Size : 46,8 Mb
Release : 2009-06-12
Category : Science
ISBN : 9783642002106

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Turbulence in Space Plasmas by Loukas Vlahos,Peter Cargill Pdf

Over the years, many leading European graduate schools in the field of astrophysical and space plasmas have operated within the framework of the research network, "Theory, Observations, and Simulations in Turbulence in Space Plasmas." This text is a set of lectures and tutorial reviews culled from the relevant work of all those schools. It emphasizes applications on solar coronae, solar flares, and the solar wind. In bridging the gap between standard textbook material and state-of-the-art research, this text offers a broad flavor to postgraduate and postdoctoral students just coming to the field. And because of its unique mix, it will also be useful to lecturers looking for advanced teaching material for their seminars and courses.

Author : A.A. Ruzmaikin,D.D. Sokoloff,A.M. Shukurov
Publisher : Springer Science & Business Media
Page : 322 pages
File Size : 41,6 Mb
Release : 2013-06-29
Category : Science
ISBN : 9789400928350

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Magnetic Fields of Galaxies by A.A. Ruzmaikin,D.D. Sokoloff,A.M. Shukurov Pdf

Magnetism, when extended beyond normal frameworks into cosmic space is characterized by an enormous spatial scale. Because of their large sizes the nature of magnets such as the Earth and the Sun is entirely different from the nature of a horseshoe magnet. The source of cosmic magnetism is associated with the hydrodynamic motions of a highly conductive medium. In this aspect, cosmic magnets resemble a dynamo. However, currents in the dynamo flow along properly ordered wires, while chaotic, turbulent motions are dominant inside stars and liquid planetary cores. This makes more intriguing and surprising the fact that these motions maintain a regular magnetic field. Maintenance of magnetic fields is even more impressive in huge magnets, i.e. galaxies. In fact, we are living inside a giant dynamo machine, the Milky Way galaxy. Although the idea of the global magnetic field of our Galaxy was clearly proposed almost 40 years ago, firm observational evidence and definite theoretical concepts of galactic magnetism have been developed only in the last decade. This book is the first attempt at a full and consistent presentation of this problem. We discuss both theoretical views on the origin of galactic magnetism and the methods of observational study. Previous discussions were on the level of review articles or separate chapters in monographs devoted to cosmic magnetic fields (see, e.g., H. K. Moffatt, 1978, E. N. Parker, 1979 and Zeldovich et aI., 1983).

Author : Sergei S. Molokov,R. Moreau,H. Keith Moffatt
Publisher : Springer Science & Business Media
Page : 408 pages
File Size : 47,9 Mb
Release : 2007-08-26
Category : Science
ISBN : 9781402048333

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Magnetohydrodynamics by Sergei S. Molokov,R. Moreau,H. Keith Moffatt Pdf

This book revises the evolution of ideas in various branches of magnetohydrodynamics (astrophysics, earth and solar dynamos, pinch, MHD turbulence and liquid metals) and reviews current trends and challenges. Uniquely, it contains the review articles on the development of the subject by pioneers in the field as well as leading experts, not just in one, but in various branches of magnetohydrodynamics, such as liquid metals, astrophysics, dynamo and pinch.

Author : Maarit J. Korpi
Publisher : Unknown
Page : 94 pages
File Size : 49,6 Mb
Release : 1999
Category : Supernovae
ISBN : 9514253256

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Interstellar Turbulence and Magnetic Fields by Maarit J. Korpi Pdf

Author : Anvar Shukurov,Kandaswamy Subramanian
Publisher : Cambridge University Press
Page : 641 pages
File Size : 52,5 Mb
Release : 2021-12-16
Category : Science
ISBN : 9780521861052

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Astrophysical Magnetic Fields by Anvar Shukurov,Kandaswamy Subramanian Pdf

This self-contained introduction to astrophysical magnetic fields provides a comprehensive review of the current state of the field and a critical discussion of the latest research. Its emphasis on results that are likely to form the basis for future progress benefits a broad audience of advanced students and active researchers.

Author : I︠A︡kov Borisovich Zelʹdovich,Aleksandr Andreevich Ruzmaĭkin,D. D. Sokoloff
Publisher : Taylor & Francis Group
Page : 392 pages
File Size : 47,7 Mb
Release : 1983
Category : Science
ISBN : UCAL:B4154537

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Magnetic Fields in Astrophysics by I︠A︡kov Borisovich Zelʹdovich,Aleksandr Andreevich Ruzmaĭkin,D. D. Sokoloff Pdf

Author : Mikhail Ya Marov,Aleksander V. Kolesnichenko
Publisher : Springer Science & Business Media
Page : 682 pages
File Size : 49,5 Mb
Release : 2013-01-16
Category : Science
ISBN : 9781461451556

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Turbulence and Self-Organization by Mikhail Ya Marov,Aleksander V. Kolesnichenko Pdf

The book deals with the development of continual models of turbulent natural media. Such models serve as a ground for the statement and numerical evaluation of the key problems of the structure and evolution of the numerous astrophysical and geophysical objects. The processes of ordering (self-organization) in an originally chaotic turbulent medium are addressed and treated in detail with the use of irreversible thermodynamics and stochastic dynamics approaches which underlie the respective models. Different examples of ordering set up in the natural environment and outer space are brought and thoroughly discussed, the main focus being given to the protoplanetary discs formation and evolution.

Author : F. Krause
Publisher : CRC Press
Page : 184 pages
File Size : 41,8 Mb
Release : 1990
Category : Science
ISBN : 0677260202

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Magnetic Fields in Galaxies by F. Krause Pdf

Presents the proceedings of the Workshop on Magnetic Fields in Galaxies, which was held in Potsdam (GDR) in the autumn of 1988.