Turbulent Magnetic Fields in Multiphase Interstellar Media Measurements, Statistics, Mode Dependence and Impact to Phase Transitions PDF Download
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Author: Ka Ho Yuen (Ph.D.)
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
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Book Description
Turbulence is ubiquitous in interstellar media and the magnetic field is the most importantforce in the universe, second to gravity. How magnetic field interacts with turbulence is still a mystery to astrophysicists due to the lack of both theoretical understanding and observational measurements. Not until the last decade when we have the modern theory of magneto-hydrodynamic turbulence and the precise interferometric measurements could we disentangle the complex interactions between magnetic fields and the underlying multi-phase interstellar media. My thesis will discuss how do we predict magnetic fields, both directions, and strength, in interstellar media from a theoretical point of view. On top of that, I will also discuss the statistics of magnetized ISM, including how different fundamental MHD modes interact with magnetic fields. More importantly, I shall also cover how magnetic field helps the formation and stability of cold neutral media (HI), including its aspect ratio and some of the observational evidence to my work
Author: Ka Ho Yuen (Ph.D.)
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
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Book Description
Turbulence is ubiquitous in interstellar media and the magnetic field is the most importantforce in the universe, second to gravity. How magnetic field interacts with turbulence is still a mystery to astrophysicists due to the lack of both theoretical understanding and observational measurements. Not until the last decade when we have the modern theory of magneto-hydrodynamic turbulence and the precise interferometric measurements could we disentangle the complex interactions between magnetic fields and the underlying multi-phase interstellar media. My thesis will discuss how do we predict magnetic fields, both directions, and strength, in interstellar media from a theoretical point of view. On top of that, I will also discuss the statistics of magnetized ISM, including how different fundamental MHD modes interact with magnetic fields. More importantly, I shall also cover how magnetic field helps the formation and stability of cold neutral media (HI), including its aspect ratio and some of the observational evidence to my work
Author: Ka Ho Yuen (Ph.D.)
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
Get Book Here
Book Description
Turbulence is ubiquitous in interstellar media and the magnetic field is the most importantforce in the universe, second to gravity. How magnetic field interacts with turbulence is still a mystery to astrophysicists due to the lack of both theoretical understanding and observational measurements. Not until the last decade when we have the modern theory of magneto-hydrodynamic turbulence and the precise interferometric measurements could we disentangle the complex interactions between magnetic fields and the underlying multi-phase interstellar media. My thesis will discuss how do we predict magnetic fields, both directions, and strength, in interstellar media from a theoretical point of view. On top of that, I will also discuss the statistics of magnetized ISM, including how different fundamental MHD modes interact with magnetic fields. More importantly, I shall also cover how magnetic field helps the formation and stability of cold neutral media (HI), including its aspect ratio and some of the observational evidence to my work
Author: Alexander Lazarian
Publisher: Springer
ISBN: 3662446251
Category : Science
Languages : en
Pages : 627
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Book Description
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: José Franco
Publisher: Cambridge University Press
ISBN: 9780521651318
Category : Science
Languages : en
Pages : 304
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Book Description
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: A.A. Ruzmaikin
Publisher: Springer Science & Business Media
ISBN: 9400928351
Category : Science
Languages : en
Pages : 322
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Book Description
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: Daivd P Belanger
Publisher: World Scientific
ISBN: 981125950X
Category : Science
Languages : en
Pages : 246
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Book Description
Magnetic crystals are ideal systems to study the universal properties of phase transitions, particularly systems with quenched randomness and frustration. Pure systems with different symmetries provide the foundation for studies in corresponding systems with quenched randomness. Because phenomena near phase transitions have universal properties, results from bulk magnetic crystals provide a basis for understanding phase transitions in films and nanoparticles, as well as many non-magnetic materials.This motivates the subject of this book, which discusses phase transitions studies in magnetic crystals from the perspective of an experimentalist who has done extensive work in the field. The advantage is that many experimental techniques are described in sufficient detail for a good understanding of the results and their comparison to theory.
Author: Heshou Zhang
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
The galactic interstellar medium is magnetized and turbulent. The magnetic field and turbulence play important roles in many astrophysical mechanisms, including cosmic ray transport, star formation, etc. Therefore, measurements of magnetic field and turbulence information are crucial for the proper interpretation of astronomical observations. Nonetheless, the magnetic field observation is quite challenging, especially, there is not universal magnetic tracer for diffuse medium. Moreover, the modelling of turbulence can be oversimplified due to the lack of observational tools to diagnose the plasma properties of the turbulence in the galactic interstellar medium. The studies presented in this thesis have addressed these challenges by bridging the theoretical studies of magnetic field and turbulence with numerical simulations and observations. The following research are presented in this thesis. The first observational evidence of the novel magnetic tracer, ground state alignment (GSA), is discovered, revealing the three-dimensional ...
Author: Ulrich Klein
Publisher: Springer
ISBN: 3319089420
Category : Science
Languages : en
Pages : 250
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Book Description
This course-tested textbook conveys the fundamentals of magnetic fields and relativistic plasma in diffuse cosmic media, with a primary focus on phenomena that have been observed at different wavelengths. Theoretical concepts are addressed wherever necessary, with derivations presented in sufficient detail to be generally accessible. In the first few chapters the authors present an introduction to various astrophysical phenomena related to cosmic magnetism, with scales ranging from molecular clouds in star-forming regions and supernova remnants in the Milky Way, to clusters of galaxies. Later chapters address the role of magnetic fields in the evolution of the interstellar medium, galaxies and galaxy clusters. The book is intended for advanced undergraduate and postgraduate students in astronomy and physics and will serve as an entry point for those starting their first research projects in the field.
Author: Sadrilla Abdullaev
Publisher: Springer Science & Business Media
ISBN: 3319018906
Category : Science
Languages : en
Pages : 422
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Book Description
This is the first book to systematically consider the modern aspects of chaotic dynamics of magnetic field lines and charged particles in magnetically confined fusion plasmas. The analytical models describing the generic features of equilibrium magnetic fields and magnetic perturbations in modern fusion devices are presented. It describes mathematical and physical aspects of onset of chaos, generic properties of the structure of stochastic magnetic fields, transport of charged particles in tokamaks induced by magnetic perturbations, new aspects of particle turbulent transport, etc. The presentation is based on the classical and new unique mathematical tools of Hamiltonian dynamics, like the action--angle formalism, classical perturbation theory, canonical transformations of variables, symplectic mappings, the Poincaré-Melnikov integrals. They are extensively used for analytical studies as well as for numerical simulations of magnetic field lines, particle dynamics, their spatial structures and statistical properties. The numerous references to articles on the latest development in the area are provided. The book is intended for graduate students and researchers who interested in the modern problems of magnetic stochasticity in magnetically confined fusion plasmas. It is also useful for physicists and mathematicians interested in new methods of Hamiltonian dynamics and their applications.
Author: Rainer Beck
Publisher: Springer Science & Business Media
ISBN: 3642726216
Category : Science
Languages : en
Pages : 286
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Book Description
Proceedings of a Workshop, Held at Schloß Ringberg, September 8-12, 1986
