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Numerical Simulations Of Astrophysical Jets
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Book Synopsis Virtual Astrophysical Jets by : Silvano Massaglia
Download or read book Virtual Astrophysical Jets written by Silvano Massaglia and published by Springer Science & Business Media. This book was released on 2013-06-05 with total page 269 pages. Available in PDF, EPUB and Kindle. Book excerpt: These proceedings are the result of a three-day meeting held in Oogliani (Italy), on October 2-4 2003, whose title was "VIrtual Astrophysical Jets 2003". Our goal in convening this meeting was to gather some of the scientists among the most active in the field of numerical simulations and modelling of astrophysi cal jets. For keeping the participants close to the "real world", we also invited a few observers to give up-to-date reviews outlining the state-of-the-art of jet observations. The principal aim of the meeting was thus to present and critically discuss the state-of-the-art numerical simulations, analytical models and laboratory ex periments for reproducing the main aspects of astrophysical jets and compar ing them with observations. The discussion has been focused on the following topics: • Observations and intepretions of jets from young stars and AGNs, comparisons of models with observations; • MHO accelerations of jets: steady self-similar models, MHO numerical simula tions of time-dependent accelerations mechanisms; • Jet stability and interaction with the ambient: formation of knots in YSO jets, jet survival to instabilities, deceleration of relativistic jets in FRI sources, simulations of jets-IGM interactions, jets propagation and galaxy formation; • Numerical codes and their validation: relativistic MHO codes, comparisons among different numerical schemes, jets in the laboratory and code validation. These topics have been discussed intensively during the meeting, and the out come of these discussions is presented in this volume. The contributions have been divided in five sections.
Book Synopsis Numerical Simulations of Astrophysical Jets by : Christopher Ian Cox
Download or read book Numerical Simulations of Astrophysical Jets written by Christopher Ian Cox and published by . This book was released on 1990 with total page 151 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Jets From Young Stars III by : Silvano Massaglia
Download or read book Jets From Young Stars III written by Silvano Massaglia and published by Springer Science & Business Media. This book was released on 2008-08-19 with total page 182 pages. Available in PDF, EPUB and Kindle. Book excerpt: The study of the mechanisms that govern origin and propagation of stellar jets involves the treatment of many concurrent physical processes such as gravitation, hydrodynamics and magnetohydrodynamics, atomic physics and radiation. In the past years, an intensive work has been done looking for so- tions of the ideal MHD equations in the steady state limit as well as studying the stability of out?ows in the linear regime. These kind, of approaches have provided a contribution to the understanding of jets that can hardly be ov- estimated. However, the extension of the analyses to the time-dependent and nonlinear regimes could not be avoided, and the MHD numerical simulations were the only mean to achieve this goal. Intherecentyears,considerableprogresseshavebeenmadebythecom- tational?uiddynamiccommunityinthedevelopmentofnumericaltechniques, theso-calledhighresolutionshockcapturingschemes,wellsuitedforthetre- ment of supersonic ?ows with discontinuities. The numerical simulations of astrophysical jets took advantage of these developments; however new physics needed to be incorporated, such as magnetic ?eld e?ects, radiation losses by diluted gases, and proper astrophysics environments. These needs led to the nontrivial extension of the methods devised for the Euler equations of g- dynamics to the magneto-hydrodynamical system. On the other hand, the possibility of carrying out numerical calculations has been greatly facilitated bytheavailability, ononehand,ofpowerfulsupercomputersand,ontheother hand, of fast processors at low cost. Large scale 3D simulations of jets at high resolution are now possible thanks to supercomputers, but also high reso- tion 2D MHD simulations can be performed routinely on desktop computers.
Book Synopsis Numerical simulations of astrophysical jets by : Dieter Kössl
Download or read book Numerical simulations of astrophysical jets written by Dieter Kössl and published by . This book was released on 1988 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Energy Transport in Sunspot Penumbrae by : Dieter Kössl
Download or read book Energy Transport in Sunspot Penumbrae written by Dieter Kössl and published by . This book was released on 1988 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Astrophysical Jets by : Silvano Massaglia
Download or read book Astrophysical Jets written by Silvano Massaglia and published by Taylor & Francis. This book was released on 1998 with total page 292 pages. Available in PDF, EPUB and Kindle. Book excerpt: First Published in 2004. Routledge is an imprint of Taylor & Francis, an informa company.
Book Synopsis Numerical Simulations of Astrophysical Jets from Kerplerian Accretion Disks by : Rachid Ouyed
Download or read book Numerical Simulations of Astrophysical Jets from Kerplerian Accretion Disks written by Rachid Ouyed and published by . This book was released on 1996 with total page 271 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Astrophysical Jets by : D. Burgarella
Download or read book Astrophysical Jets written by D. Burgarella and published by Cambridge University Press. This book was released on 1993-11-11 with total page 332 pages. Available in PDF, EPUB and Kindle. Book excerpt: A collection of edited review articles presented at a workshop at the Space Telescope Science Institute which gathered astrophysicists from the fields of extragalactic and galactic/stellar jets.
Author :Rachid Ouyed Publisher :National Library of Canada = Bibliothèque nationale du Canada ISBN 13 :9780612301658 Total Pages :271 pages Book Rating :4.3/5 (16 download)
Book Synopsis Numerical Simulations of Astrophysical Jets from Keplerian Accretion Disks [microform] by : Rachid Ouyed
Download or read book Numerical Simulations of Astrophysical Jets from Keplerian Accretion Disks [microform] written by Rachid Ouyed and published by National Library of Canada = Bibliothèque nationale du Canada. This book was released on 1997 with total page 271 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :Paulo Jorge Valente Garcia Publisher :Springer Science & Business Media ISBN 13 :364202288X Total Pages :259 pages Book Rating :4.6/5 (42 download)
Book Synopsis Jets from Young Stars IV by : Paulo Jorge Valente Garcia
Download or read book Jets from Young Stars IV written by Paulo Jorge Valente Garcia and published by Springer Science & Business Media. This book was released on 2009-11-23 with total page 259 pages. Available in PDF, EPUB and Kindle. Book excerpt: Astronomical jets are key astrophysical phenomena observed in gamma-ray bursts, active galactic nuclei or young stars. Research on them has largely occurred within the domains of astronomical observations, astrophysical modeling and numerical simulations, but the recent advent of high energy density facilities has added experimental control to jet studies. Front-line research on jet launching and collimation requires a highly interdisciplinary approach and an elevated level of sophistication. Bridging the gaps between pure magnetohydrodynamics, thermo-chemical evolution, high angular resolution spectro-imaging and laboratory experiments is no small matter. This volume strives to bridge those very gaps. It offers a series of lectures which, taken as whole, act as a thorough reference for the foundations of this discipline. These lectures address the following: · laboratory jets physics from laser and z-pinch plasma experiments, · the magnetohydrodynamic theory of relativistic and non-relativistic stationary jets, · heating mechanisms in magnetohydrodynamic jets, from the solar magnetic reconnection to the molecular shock heating perspectives, · atomic and molecular microphysics of jet shocked material. In addition to the lectures, the book offers, in closing, a presentation of a series of observational diagnostics, thus allowing for the recovery of basic physical quantities from jet emission lines.
Book Synopsis JET Simulations, Experiments, and Theory by : Christophe Sauty
Download or read book JET Simulations, Experiments, and Theory written by Christophe Sauty and published by Springer. This book was released on 2019-08-02 with total page 154 pages. Available in PDF, EPUB and Kindle. Book excerpt: In 2008, the European FP6 JETSET project ended. JETSET, for Jet, Simulations, Experiments, and Theory, was a joint research network of European expert teams on protostellar jets. The present proceedings are a collection of contributions presenting new results obtained by those groups since the end of the JETSET program. This is also the occasion to celebrate Kanaris Tsinganos’ important contributions to this network and for his enlightening insight in the subject that inspired us all. Some of the former JETSET students are now in the academic world and the subject has never been so alive. So we present here a collection of results of what has been done in the field of protostellar jets in the past ten years from the theoretical, numerical, observational and experimental point of view. We also present new challenges in the field of protostellar jets and what we should expect from the development of new instruments and new numerical codes in the near future. We also gather results on the impact of the study of protostellar jets on other jet studies in particular on relativistic jets. As a matter of fact, it is time for a new network.
Book Synopsis MHD Flows in Compact Astrophysical Objects by : Vasily S. Beskin
Download or read book MHD Flows in Compact Astrophysical Objects written by Vasily S. Beskin and published by Springer Science & Business Media. This book was released on 2009-12-08 with total page 425 pages. Available in PDF, EPUB and Kindle. Book excerpt: Accretion flows, winds and jets of compact astrophysical objects and stars are generally described within the framework of hydrodynamical and magnetohydrodynamical (MHD) flows. Analytical analysis of the problem provides profound physical insights, which are essential for interpreting and understanding the results of numerical simulations. Providing such a physical understanding of MHD Flows in Compact Astrophysical Objects is the main goal of this book, which is an updated translation of a successful Russian graduate textbook. The book provides the first detailed introduction into the method of the Grad-Shafranov equation, describing analytically the very broad class of hydrodynamical and MHD flows. It starts with the classical examples of hydrodynamical accretion onto relativistic and nonrelativistic objects. The force-free limit of the Grad-Shafranov equation allows us to analyze in detail the physics of the magnetospheres of radio pulsars and black holes, including the Blandford-Znajek process of energy extraction from a rotating black hole immersed in an external magnetic field. Finally, on the basis of the full MHD version of the Grad-Shafranov equation the author discusses the problems of jet collimation and particle acceleration in Active Galactic Nuclei, radio pulsars, and Young Stellar Objects. The comparison of the analytical results with numerical simulations demonstrates their good agreement. Assuming that the reader is familiar with the basic physical and mathematical concepts of General Relativity, the author uses the 3+1 split approach which allows the formulation of all results in terms of physically clear language of three dimensional vectors. The book contains detailed derivations of equations, numerous exercises, and an extensive bibliography. It therefore serves as both an introductory text for graduate students and a valuable reference work for researchers in the field.
Book Synopsis Jets from Young Stars by : Jonathan Ferreira
Download or read book Jets from Young Stars written by Jonathan Ferreira and published by Springer. This book was released on 2007-08-30 with total page 230 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume presents the edited lecture notes of the First JETSET School on Jets from Young Stars: Models and Constraints, held by the Marie Curie Research and Training Network on JET Simulations, Experiments and Theory. The first half of the book is devoted to general observational constraints. The second section is devoted to theoretical knowledge of magneto-hydrodynamic processes pertinent to the jet launching mechanism in young stars.
Book Synopsis Jets From Young Stars V by : José Gracia
Download or read book Jets From Young Stars V written by José Gracia and published by Springer. This book was released on 2009-10-30 with total page 232 pages. Available in PDF, EPUB and Kindle. Book excerpt: Studying the complex physical systems of stellar jets necessitates the incorporation of nonlinear effects which occur on a wide variety of length and timescales. One of the primary methods used to study the physics of jets is numerical simulations that apply high performance computing techniques. Such techniques are also required for analysing the huge modern astrophysical datasets. This book examines those computing techniques. It is a collection of the lectures from the fifth and final school of the JETSET network, "Jets From Young Stars V: High Performance Computing in Astrophysics." It begins with an introduction to parallel programming techniques, with an emphasis on Message Passing Interface (MPI), before it goes on to review grid technology techniques and offer a practical introduction to Virtual Observatory. The second half of the book, then, is devoted to applications of high performance computing techniques, including 3D radiation transfer, to jet and star formation processes. Aimed at graduate students in astrophysics, this book presents state-of-the-art methods, thereby offering interesting new insights to researchers in the field.
Book Synopsis Jets From Young Stars III by : Silvano Massaglia
Download or read book Jets From Young Stars III written by Silvano Massaglia and published by Springer. This book was released on 2008-07-18 with total page 178 pages. Available in PDF, EPUB and Kindle. Book excerpt: The study of the mechanisms that govern origin and propagation of stellar jets involves the treatment of many concurrent physical processes such as gravitation, hydrodynamics and magnetohydrodynamics, atomic physics and radiation. In the past years, an intensive work has been done looking for so- tions of the ideal MHD equations in the steady state limit as well as studying the stability of out?ows in the linear regime. These kind, of approaches have provided a contribution to the understanding of jets that can hardly be ov- estimated. However, the extension of the analyses to the time-dependent and nonlinear regimes could not be avoided, and the MHD numerical simulations were the only mean to achieve this goal. Intherecentyears,considerableprogresseshavebeenmadebythecom- tational?uiddynamiccommunityinthedevelopmentofnumericaltechniques, theso-calledhighresolutionshockcapturingschemes,wellsuitedforthetre- ment of supersonic ?ows with discontinuities. The numerical simulations of astrophysical jets took advantage of these developments; however new physics needed to be incorporated, such as magnetic ?eld e?ects, radiation losses by diluted gases, and proper astrophysics environments. These needs led to the nontrivial extension of the methods devised for the Euler equations of g- dynamics to the magneto-hydrodynamical system. On the other hand, the possibility of carrying out numerical calculations has been greatly facilitated bytheavailability, ononehand,ofpowerfulsupercomputersand,ontheother hand, of fast processors at low cost. Large scale 3D simulations of jets at high resolution are now possible thanks to supercomputers, but also high reso- tion 2D MHD simulations can be performed routinely on desktop computers.
Book Synopsis Jets at All Scales (IAU S275) by : Gustavo E. Romero
Download or read book Jets at All Scales (IAU S275) written by Gustavo E. Romero and published by Cambridge University Press. This book was released on 2011-03-17 with total page 440 pages. Available in PDF, EPUB and Kindle. Book excerpt: Research on all aspects of jet physics has made dramatic progress in recent years. Numerical simulations, semi-analytical models, and observations across the entire electromagnetic spectrum have shed new light on the formation, collimation, propagation, interaction and radiation of astrophysical jets on all scales. The proceedings of IAU Symposium 275 present an up-to-date account of our current knowledge of jets and outflows in different astronomical situations, covering a vast range of phenomena, from protostellar jets up to extragalactic jets. Reviews by the leading scientists in the field set the context for lively discussions and contributed papers on the most varied aspects of jet physics, fostering links between these usually disparate areas.
Book Synopsis Relativistic Jets by : Philip A. Hughes
Download or read book Relativistic Jets written by Philip A. Hughes and published by . This book was released on 2006 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt: Highly collimated flows of plasma (jets), with speeds comparable to that of light, are a ubiquitous feature of our Universe. While the global dynamics of extragalactic jets is reasonably well understood, their composition and internal structure, and the role of magnetic fields, remain obscure. Major questions remain concerning the physics of the gamma-ray emission itself. This proceedings includes the eight invited talks presented at this conference.
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