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Author: Roberto Bruno Publisher: Springer ISBN: 3319434403 Category : Science Languages : en Pages : 270
Book Description
This book provides an overview of solar wind turbulence from both the theoretical and observational perspective. It argues that the interplanetary medium offers the best opportunity to directly study turbulent fluctuations in collisionless plasmas. In fact, during expansion, the solar wind evolves towards a state characterized by large-amplitude fluctuations in all observed parameters, which resembles, at least at large scales, the well-known hydrodynamic turbulence. This text starts with historical references to past observations and experiments on turbulent flows. It then introduces the Navier-Stokes equations for a magnetized plasma whose low-frequency turbulence evolution is described within the framework of the MHD approximation. It also considers the scaling of plasma and magnetic field fluctuations and the study of nonlinear energy cascades within the same framework. It reports observations of turbulence in the ecliptic and at high latitude, treating Alfvénic and compressive fluctuations separately in order to explain the transport of mass, momentum and energy during the expansion. Further, existing models are compared with direct observations in the heliosphere. The problem of self-similar and anomalous fluctuations in the solar wind is then addressed using tools provided by dynamical system theory and discussed on the basis of available models and observations. The book highlights observations of Yaglom’s law in solar wind turbulence, which is one of the most important findings in fully developed turbulence and directly related to the long-lasting and still unsolved problem of solar wind plasma heating. Lastly, it includes a short chapter dedicated to the kinetic range of fluctuations, which has recently been receiving more attention from the space plasma community, since this is inherently related to turbulent energy dissipation and consequent plasma heating. It particularly focuses on the nature and role of the fluctuations populating this frequency range, and discusses several model predictions and recent observational findings in this context.
Author: Roberto Bruno Publisher: Springer ISBN: 3319434403 Category : Science Languages : en Pages : 270
Book Description
This book provides an overview of solar wind turbulence from both the theoretical and observational perspective. It argues that the interplanetary medium offers the best opportunity to directly study turbulent fluctuations in collisionless plasmas. In fact, during expansion, the solar wind evolves towards a state characterized by large-amplitude fluctuations in all observed parameters, which resembles, at least at large scales, the well-known hydrodynamic turbulence. This text starts with historical references to past observations and experiments on turbulent flows. It then introduces the Navier-Stokes equations for a magnetized plasma whose low-frequency turbulence evolution is described within the framework of the MHD approximation. It also considers the scaling of plasma and magnetic field fluctuations and the study of nonlinear energy cascades within the same framework. It reports observations of turbulence in the ecliptic and at high latitude, treating Alfvénic and compressive fluctuations separately in order to explain the transport of mass, momentum and energy during the expansion. Further, existing models are compared with direct observations in the heliosphere. The problem of self-similar and anomalous fluctuations in the solar wind is then addressed using tools provided by dynamical system theory and discussed on the basis of available models and observations. The book highlights observations of Yaglom’s law in solar wind turbulence, which is one of the most important findings in fully developed turbulence and directly related to the long-lasting and still unsolved problem of solar wind plasma heating. Lastly, it includes a short chapter dedicated to the kinetic range of fluctuations, which has recently been receiving more attention from the space plasma community, since this is inherently related to turbulent energy dissipation and consequent plasma heating. It particularly focuses on the nature and role of the fluctuations populating this frequency range, and discusses several model predictions and recent observational findings in this context.
Author: Gérard Belmont Publisher: John Wiley & Sons ISBN: 3527656243 Category : Science Languages : en Pages : 389
Book Description
Collisionless Plasmas in Astrophysics examines the unique properties of media without collisions in plasma physics. Experts in this field, the authors present the first book to concentrate on collisionless conditions in plasmas, whether close or not to thermal equilibrium. Filling a void in scientific literature, Collisionless Plasmas in Astrophysics explains the possibilities of modeling such plasmas, using a fluid or a kinetic framework. It also addresses common misconceptions that even professionals may possess, on phenomena such as "collisionless (Landau) damping". Abundant illustrations are given in both space physics and astrophysics.
Author: Jean-Pierre Rozelot Publisher: Springer ISBN: 3540337598 Category : Science Languages : en Pages : 176
Book Description
This book comprises an excursion through space weather, a scientific topic in rapid growth and with growing impact and implications for technological societies. The text is aimed at students and scientists working, or interested in, the field and provides a thorough introduction to the topic for those who wish to become acquainted with the basic solar physics at the origin of space weather.
Author: Dastgeer Shaikh Publisher: AIP Conference Proceedings / A ISBN: Category : Science Languages : en Pages : 454
Book Description
This book contains the peer-reviewed papers presented at the Sixth Annual International Astrophysics Conference. This conference brought together a range of topics that shed light on our understanding and status of turbulence and nonlinear processes in astrophysical plasmas. Coverage in this volume includes turbulent relaxation in laboratory and space plasmas and its application to coronal flux tubes, coronal heating, and the diffusion of energetic particles.
Author: Marco Velli Publisher: American Institute of Physics ISBN: 9780735401488 Category : Science Languages : en Pages : 886
Book Description
The Tenth Solar Wind conference describes the latest results in the physics of the outer solar atmosphere, the solar wind, and the interplanetary medium which together comprise the heliosphere. The conference brought together researchers studying the sun and its influence on the earth’s space environment both from an experimental and theoretical point of view. The effect of the solar magnetic field in shaping and accelerating the solar wind throughout the solar cycle, via coronal heating and coronal mass ejections was described in unprecedented clarity and breadth, thanks to both satellite experiments and numerical modelling. The conference proceedings is of interest to researchers in space science and the geomagnetic effects of solar activity, plasma physicists and astrophysicists as well as other scientists interested in the life of our mother star.
Author: CHADI.. SALEM Publisher: ISBN: Category : Languages : fr Pages : 309
Book Description
CE TRAVAIL EST LIE A UN PROBLEME CLE, RELEVANT A LA FOIS DE LA PHYSIQUE SPATIALE ET DE LA PHYSIQUE FONDAMENTALE, QUI EST LA CARACTERISATION DES PHENOMENES DISSIPATIFS DANS UN MILIEU TURBULENT FAIBLEMENT COLLISIONNEL. DE PAR SES PROPRIETES QUE L'ON MESURE IN-SITU GRACE AUX SONDES SPATIALES, LE VENT SOLAIRE CONSTITUE UN LABORATOIRE IDEAL POUR CE TYPE D'ETUDES. LE BUT DE CETTE THESE EST D'ANALYSER LES FLUCTUATIONS ASSOCIEES AU VENT SOLAIRE ET DE DONNER, POUR LA PREMIERE FOIS, UNE VUE GLOBALE DES PHENOMENES AYANT LIEU SUR UNE TRES GRANDE GAMME D'ECHELLES, ALLANT DES ECHELLES MACROSCOPIQUES MHD (BASSES FREQUENCES) AUX ECHELLES CINETIQUES (HAUTES FREQUENCES), OU LA DISSIPATION EST SUPPOSEE JOUER UN ROLE IMPORTANT. NOUS UTILISONS POUR CELA LES OBSERVATIONS FOURNIES PAR LA NOUVELLE GENERATION D'INSTRUMENTS (MESURANT LES ONDES ET LES PARTICULES) EMBARQUES SUR LA SONDE SPATIALE WIND, DONT LES HAUTES RESOLUTIONS TEMPORELLES (JUSQU'A UNE DIZAINE DE MICROSECONDES) ET SPECTRALES (QUELQUES HZ) N'ONT JAMAIS ETE ATTEINTES AUPARAVANT DANS LE VENT SOLAIRE. CETTE HAUTE RESOLUTION A PERMIS DE REVELER QUE, CONTRAIREMENT A LA TURBULENCE A BASSE FREQUENCE, LES ONDES A HAUTE FREQUENCE SONT TRES COHERENTES. CE TRAVAIL SE DIVISE EN TROIS PARTIES : (1) L'ETUDE DES ONDES ELECTROSTATIQUES COHERENTES A PARTIR DE L'ANALYSE DU BRUIT ELECTROMAGNETIQUE A HAUTE FREQUENCE MESURE PAR L'EXPERIENCE WAVES ; (2) L'ETUDE DES PROPRIETES GLOBALES DES PROTONS ET DES ELECTRONS DU VENT SOLAIRE VIA L'ANALYSE DES FONCTIONS DE DISTRIBUTION DES PARTICULES OBTENUES PAR L'EXPERIENCE 3D-PLASMA ; (3) L'ETUDE DE LA TURBULENCE A BASSE FREQUENCE A PARTIR DU CHAMP MAGNETIQUE MESURE PAR L'EXPERIENCE MFI ET DES DONNEES PARTICULES OBTENUES PAR L'EXPERIENCE 3D-PLASMA.
Author: Donald B. Percival Publisher: Cambridge University Press ISBN: 9780521435413 Category : Mathematics Languages : en Pages : 616
Book Description
This book is an up-to-date introduction to univariate spectral analysis at the graduate level, which reflects a new scientific awareness of spectral complexity, as well as the widespread use of spectral analysis on digital computers with considerable computational power. The text provides theoretical and computational guidance on the available techniques, emphasizing those that work in practice. Spectral analysis finds extensive application in the analysis of data arising in many of the physical sciences, ranging from electrical engineering and physics to geophysics and oceanography. A valuable feature of the text is that many examples are given showing the application of spectral analysis to real data sets. Special emphasis is placed on the multitaper technique, because of its practical success in handling spectra with intricate structure, and its power to handle data with or without spectral lines. The text contains a large number of exercises, together with an extensive bibliography.
Author: Loukas Vlahos Publisher: Springer Science & Business Media ISBN: 3642002099 Category : Science Languages : en Pages : 332
Book Description
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: C.-Y. Tu Publisher: Springer Science & Business Media ISBN: 9401585415 Category : Science Languages : en Pages : 214
Book Description
This is the first book to give a comprehensive overview of recent observational and theoretical results on solar wind structures and fluctuations and magnetohydrodynamic waves and turbulence, preference being given to phenomena in the inner heliosphere. Emphasis is placed on the progress made in the past decade in the understanding of the nature and origin of especially small-scale, compressible and incompressible fluctuations. Turbulence models describing the spatial transport and spectral transfer of the fluctuations in the inner heliosphere are discussed. Intermittency of solar wind fluctuations and their statistical distributions are investigated. Studies of the heating and acceleration effects of the turbulence on the background wind are critically surveyed. Finally, open questions concerning the origin, nature and evolution of the fluctuations are listed, and perspectives for future research are outlined. The book is for graduate students and researchers in the field. Other target groups are scientists and professionals interested in space plasma physics and/or MHD turbulence.
Author: Roberto Bruno
Author: Roberto Bruno
Author: Gérard Belmont
Author: Jean-Pierre Rozelot
Author: Dastgeer Shaikh
Author: 
Author: Marco Velli
Author: CHADI.. SALEM
Author: Donald B. Percival
Author: Loukas Vlahos
Author: C.-Y. Tu