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Numerical Simulations Of Astrophysical Jets From Keplerian Accretion Disks Microform
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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:
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 2010-11-30 with total page 0 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 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 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 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 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 2012-03-14 with total page 0 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 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 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 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 The Formation and Disruption of Black Hole Jets by : Ioannis Contopoulos
Download or read book The Formation and Disruption of Black Hole Jets written by Ioannis Contopoulos and published by Springer. This book was released on 2016-08-23 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book reviews the phenomenology displayed by relativistic jets as well as the most recent theoretical efforts to understand the physical mechanisms at their origin. Relativistic jets have been observed and studied in Active Galactic Nuclei (AGN) for about half a century and are believed to be fueled by accretion onto a supermassive black hole at the center of the host galaxy. Since the first discovery of relativistic jets associated with so-called "micro-quasars" much more recently, it has seemed clear that much of the physics governing the relativistic outflows in stellar X-ray binaries harboring black holes and in AGN must be common, but acting on very different spatial and temporal scales. With new observational and theoretical results piling up every day, this book attempts to synthesize a consistent, unified physical picture of the formation and disruption of jets in accreting black-hole systems. The chapters in this book offer overviews accessible not only to specialists but also to graduate students and astrophysicists working in other areas. Covered topics comprise Relativistic jets in stellar systems Launching of AGN jets Parsec-scale AGN jets Kiloparsec-scale AGN jets Black hole magnetospheres Theory of relativistic jets The structure and dynamics of the inner accretion disk The origin of the jet magnetic field X-ray observations, phenomenology, and connection with theory
Book Synopsis Numerical Simulations of Relativistic Jets in Collapsars by : Weiqun Zhang
Download or read book Numerical Simulations of Relativistic Jets in Collapsars written by Weiqun Zhang and published by . This book was released on 2003 with total page 266 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 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 Novel Laboratory Simulations of Astrophysical Jets by : Parrish Clawson Brady
Download or read book Novel Laboratory Simulations of Astrophysical Jets written by Parrish Clawson Brady and published by . This book was released on 2008 with total page 802 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis was motivated by the promise that some physical aspects of astrophysical jets and collimation processes can be scaled to laboratory parameters through hydrodynamic scaling laws. The simulation of astrophysical jet phenomena with laser-produced plasmas was attractive because the laser-target interaction can inject energetic, repeatable plasma into an external environment. Novel laboratory simulations of astrophysical jets involved constructing and using the YOGA laser, giving a 1064 nm, 8 ns pulse laser with energies up to 3:7 - 0:2 J. Laser-produced plasmas were characterized using Schlieren, interferometry and ICCD photography for their use in simulating jet and magnetosphere physics. The evolution of the laser-produced plasma in various conditions was compared with self-similar solutions and HYADES computer simulations. Millimeter-scale magnetized collimated out-flows were produced by a centimeter scale cylindrically symmetric electrode conguration triggered by a laser-produced plasma. A cavity with a flared nozzle surrounded the center electrode and the electrode ablation created supersonic uncollimated flows. This flow became collimated when the center electrode changed from an anode to a cathode. The plasma jets were in axially directed permanent magnetic fields with strengths up to 5000 Gauss. The collimated magnetized jets were 0.1-0.3 cm wide, up to 2.0 cm long, and had velocities of ~ 4:0 x 106 cm/s. The dynamics of the evolution of the jet were compared qualitatively and quantitatively with fluxtube simulations from Bellan's formulation [6] giving a calculated estimate of ~ 2:6 x 106 cm=s for jet evolution velocity and evidence for jet rotation. The density measured with interferometry was 1.9 " .2 x 1017 cm−3 compared with 2.1 x1016 cm−3 calculated with Bellan's pressure balance formulation [6]. Kinks in the jet column were produced consistent with the Kruskal-Shafranov condition which allowed stable and symmetric jets to form with the background magnetic fields. The Euler number for the laboratory jet was 9 compared with an estimate of 40 for young stellar object jets [135] which demonstrated adequate scaling between the two frames. A second experiment was performed concerning laboratory simulations of magnetospheres with plasma winds impinging on permanent magnetic dipoles. The ratio of the magnetopause measured with ICCD photography to the calculated magnetopause standoff distance was ~2.
Book Synopsis Numerical Simulation of Viscous Accretion Disks by : Ronald Drimmel
Download or read book Numerical Simulation of Viscous Accretion Disks written by Ronald Drimmel and published by . This book was released on 2019-05-31 with total page 296 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dissertation Discovery Company and University of Florida are dedicated to making scholarly works more discoverable and accessible throughout the world. This dissertation, "Numerical Simulation of Viscous Accretion Disks" by Ronald Eugene Drimmel, was obtained from University of Florida and is being sold with permission from the author. A digital copy of this work may also be found in the university's institutional repository, IR@UF. The content of this dissertation has not been altered in any way. We have altered the formatting in order to facilitate the ease of printing and reading of the dissertation.
Author :Michael P. (Michael Patrick) Casey Publisher :National Library of Canada = Bibliothèque nationale du Canada ISBN 13 :9780612164826 Total Pages :156 pages Book Rating :4.1/5 (648 download)
Book Synopsis Numerical Simulations of the Extragalactic Jet in M87 [microform] by : Michael P. (Michael Patrick) Casey
Download or read book Numerical Simulations of the Extragalactic Jet in M87 [microform] written by Michael P. (Michael Patrick) Casey and published by National Library of Canada = Bibliothèque nationale du Canada. This book was released on 1996 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Virtual astrophysical jets written by and published by . This book was released on 2004 with total page 269 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Astrophysical Jets by : Denis Burgarella
Download or read book Astrophysical Jets written by Denis Burgarella and published by . This book was released on 1993 with total page 315 pages. Available in PDF, EPUB and Kindle. Book excerpt: