Jets From Young Stars Iv

Author : Paulo Jorge Valente Garcia,Joao Miguel Ferreira
Publisher : Springer Science & Business Media
Page : 259 pages
File Size : 53,5 Mb
Release : 2009-11-23
Category : Science
ISBN : 9783642022883

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Jets from Young Stars IV by Paulo Jorge Valente Garcia,Joao Miguel Ferreira Pdf

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.

Author : Paulo Jorge Valente Garcia,Joao Miguel Ferreira
Publisher : Springer
Page : 252 pages
File Size : 40,5 Mb
Release : 2009-11-09
Category : Science
ISBN : 9783642022890

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Jets from Young Stars IV by Paulo Jorge Valente Garcia,Joao Miguel Ferreira Pdf

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.

Author : Francesca Bacciotti,Emma Whelan,Leonardo Testi
Publisher : Springer
Page : 297 pages
File Size : 54,7 Mb
Release : 2007-10-31
Category : Science
ISBN : 9783540680321

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Jets from Young Stars II by Francesca Bacciotti,Emma Whelan,Leonardo Testi Pdf

This volume offers a background in modern high spatial resolution techniques, illustrating how such methods have impacted on our understanding of young stars. It provides hands-on insight into observing from space as well as the ground, the use of interferometers at millimeter and infrared wavelengths, image analysis and spectral diagnostic techniques, and High Angular Resolution studies of the inner regions of circumstellar disks that play a fundamental role in jet launching.

Author : Silvano Massaglia,Gianluigi Bodo,Andrea Mignone,Paola Rossi
Publisher : Springer
Page : 178 pages
File Size : 46,8 Mb
Release : 2008-07-18
Category : Science
ISBN : 3540769676

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Jets From Young Stars III by Silvano Massaglia,Gianluigi Bodo,Andrea Mignone,Paola Rossi Pdf

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.

Author : A.J.L. Fernandes,Paulo J.V. Garcia,J.J.G. Lima
Publisher : Springer Science & Business Media
Page : 272 pages
File Size : 46,6 Mb
Release : 2012-12-06
Category : Science
ISBN : 9789400709997

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Jets in Young Stellar Objects by A.J.L. Fernandes,Paulo J.V. Garcia,J.J.G. Lima Pdf

A JENAM 2002 Workshop, Porto, Portugal, 3-5 September 2002

Author : José Gracia,Fabio de Colle,Turlough Downes
Publisher : Springer Science & Business Media
Page : 232 pages
File Size : 53,7 Mb
Release : 2009-11-11
Category : Science
ISBN : 9783642033698

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Jets From Young Stars V by José Gracia,Fabio de Colle,Turlough Downes Pdf

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.

Author : Jonathan Ferreira,Catherine Dougados,Emma Whelan
Publisher : Springer
Page : 228 pages
File Size : 47,7 Mb
Release : 2007-08-30
Category : Science
ISBN : 9783540680352

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Jets from Young Stars by Jonathan Ferreira,Catherine Dougados,Emma Whelan Pdf

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.

Author : S. Böhme,Prof. Dr. Walter Fricke,H. Hefele,Inge Heinrich,W. Hofmann,D. Krahn,V. R. Matas,Dr. Lutz D. Schmadel,G. Zech
Publisher : Springer Science & Business Media
Page : 928 pages
File Size : 53,6 Mb
Release : 2013-04-17
Category : Science
ISBN : 9783662123461

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Literature 1984, Part 2 by S. Böhme,Prof. Dr. Walter Fricke,H. Hefele,Inge Heinrich,W. Hofmann,D. Krahn,V. R. Matas,Dr. Lutz D. Schmadel,G. Zech Pdf

Author : Gustavo E. Romero,Gabriela S. Vila
Publisher : Springer
Page : 326 pages
File Size : 45,7 Mb
Release : 2013-09-14
Category : Science
ISBN : 9783642395963

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Introduction to Black Hole Astrophysics by Gustavo E. Romero,Gabriela S. Vila Pdf

This book is based on the lecture notes of a one-semester course on black hole astrophysics given by the author and is aimed at advanced undergraduate and graduate students with an interest in astrophysics. The material included goes beyond that found in classic textbooks and presents details on astrophysical manifestations of black holes. In particular, jet physics and detailed accounts of objects like microquasars, active galactic nuclei, gamma-ray bursts, and ultra-luminous X-ray sources are covered, as well as advanced topics like black holes in alternative theories of gravity. The author avoids unnecessary technicalities and to some degree the book is self-contained. The reader will find some basic general relativity tools in Chapter 1. The appendices provide some additional mathematical details that will be useful for further study, and a guide to the bibliography on the subject.

Author : Bo Reipurth,David Jewitt,Klaus Keil
Publisher : University of Arizona Press
Page : 994 pages
File Size : 54,5 Mb
Release : 2007
Category : Science
ISBN : 0816526540

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Protostars and Planets V by Bo Reipurth,David Jewitt,Klaus Keil Pdf

'Protostars and Planets V' builds on the latest results from recent advances in ground and space-based astronomy and in numerical computing techniques to offer the most detailed and up-to-date picture of star and planet formation - including the formation and early evolution of our own solar system.

Author : International Astronomical Union. Symposium
Publisher : Cambridge University Press
Page : 396 pages
File Size : 55,7 Mb
Release : 2007
Category : Science
ISBN : 0521874653

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Star-Disk Interaction in Young Stars (IAU S243) by International Astronomical Union. Symposium Pdf

Reviews latest star-disk interaction region in young stars for graduate students and researchers.

Author : Sociedad Española De Astronomía. Scientific Meeting
Publisher : Springer Science & Business Media
Page : 373 pages
File Size : 40,8 Mb
Release : 2007-07-23
Category : Science
ISBN : 9781402059995

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Highlights of Spanish Astrophysics IV by Sociedad Española De Astronomía. Scientific Meeting Pdf

This volume documents the contributions presented at the Seventh Scientific Meeting of the Spanish Astronomical Society (Sociedad Española de Astronomía, SEA). The event bought together 301 participants who presented 161 contributed talks and 120 posters, the greatest numbers up to now. The fact that most exciting items of the current astronomical research were addressed in the meeting proofs the good health of the SEA, a consolidated organization founded fifteen years ago in Barcelona. Two plenary sessions of the meeting were devoted to the approved entrance of Spain as a full member of the European Southern Observatory (ESO) and to the imminent first light of the greatest telescope in the world, the GTC (Gran Telescopio de Canarias), milestones that will certainly lead the Spanish Astronomy in the next future.

Author : A.W. Guthmann,M. Georganopoulos,A. Marcowith,K. Manolakou
Publisher : Springer
Page : 246 pages
File Size : 42,8 Mb
Release : 2008-01-11
Category : Science
ISBN : 9783540460251

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Relativistic Flows in Astrophysics by A.W. Guthmann,M. Georganopoulos,A. Marcowith,K. Manolakou Pdf

1. 1 Schematic Picture of AGN Some galaxies are known to emit radiation with extremely high luminosities from a rather small volume in the ??ray, X-ray and UV continuum. Such active cores are the so-called Active Galactic Nuclei (AGN) and the radiation is commonly believed to be a result of gravitational energy released by matter spiraling around 9 a supermassive central black hole of about 10 M (see Fig. 1). Though the central engine which produces the enormous observed activity cannot be resolved observationally, a standard picture of an AGN has gradually emerged to explain the richness of the radiation spectra: • an accretion disk with radius from about 2 to 100 gravitational radii, R , g feeding the central black hole and emitting mainly in the UV and soft X-rays; • the broad line optically emitting clouds (BLR), which seem to be absent in 3 some sources (e. g. FRI, see hereafter) and extend up to a few 10 R from g the center.

Author : Willy Benz,R. Kallenbach,Günter Lugmair
Publisher : Springer Science & Business Media
Page : 426 pages
File Size : 50,8 Mb
Release : 2012-12-06
Category : Science
ISBN : 9789401141468

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From Dust to Terrestrial Planets by Willy Benz,R. Kallenbach,Günter Lugmair Pdf

The workshop "From Dust to Terrestrial Planets" was initiated by a working group of planetary scientists invited to ISSI by Johannes Geiss in November 1997. The group split to focus on three topics, one of which was the history of the early solar system, including the formation of the terrestrial planets in the inner solar system. Willy Benz, Gunter Lugmair, and Frank Podosek were invited to convene planetary scientists, astrophysicists, and cosmochemists to synthesize the current knowledge on the origin and evolution of our inner planetary system. The convenors raised the interest of scientists from all over the world in the detailed assessment of the available astronomical, chronological, geochemical and dynamical constraints of the first period of inner solar system evolution. In partic ular, this included appraisal of the newest results from astronomical observations by the Hubble Space Telescope, the Infrared Space Observatory, and other space and ground-based facilities of solar-like systems and nebular disks, possibly repre senting early stages of the solar accretion disk and planet formation. At the same time, the current models of the origin, evolution, transport, and accretion processes of circum stellar disks were presented. This included the new insights provided by the recent discovery of extrasolar giant planets, which were considered insofar as they are relevant to the overall dynamics of the inner part of the solar system.

Author : S. Böhme,Prof. Dr. Walter Fricke,H. Hefele,Inge Heinrich,W. Hofmann,D. Krahn,V. R. Matas,Dr. Lutz D. Schmadel,G. Zech
Publisher : Springer Science & Business Media
Page : 947 pages
File Size : 50,6 Mb
Release : 2013-11-11
Category : Science
ISBN : 9783662123430

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Literature 1984, Part 1 by S. Böhme,Prof. Dr. Walter Fricke,H. Hefele,Inge Heinrich,W. Hofmann,D. Krahn,V. R. Matas,Dr. Lutz D. Schmadel,G. Zech Pdf