Stability analysis of relativistic jets from collapsars and its implications on the short-term variability of gamma-ray bursts
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Stability analysis of relativistic jets from collapsars and its implications on the short-term variability of gamma-ray bursts

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Stability analysis of relativistic jets from collapsars and its implications on the short-term variability of gamma-ray bursts

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dc.contributor.author Aloy Toras, Miguel Angel
dc.contributor.author Ibáñez Cabanell, José María
dc.contributor.author Miralles Torres, Juan Antonio
dc.contributor.author Urpin, Vadim
dc.date.accessioned 2010-07-30T11:18:02Z
dc.date.available 2010-07-30T11:18:02Z
dc.date.issued 2002
dc.identifier.uri http://hdl.handle.net/10550/16756
dc.description.abstract We consider the transverse structure and stability properties of relativistic jets formed in the course of the collapse of a massive progenitor. Our numerical simulations show the presence of a strong shear in the bulk velocity of such jets. This shear can be responsible for a very rapid shear–driven instability that arises for any velocity profile. This conclusion has been confirmed both by numerical simulations and theoretical analysis. The instability leads to rapid fluctuations of the main hydrodynamical parameters (density, pressure, Lorentz factor, etc.). However, the perturbations of the density are e ectively decoupled from those of the pressure because the beam of the jet is radiation–dominated. The characteristic growth time of instability is much shorter than the life time of the jet and, therefore, may lead to a complete turbulent beam. In the course of the non-linear evolution, these fluctuations may yield to internal shocks which can be randomly distributed in the jet. In the case that internal shocks in a ultrarelativistic outflow are responsible for the observed phenomenology of gamma-ray bursts, the proposed instability can well account for the short-term variability of gamma-ray light curves down to milliseconds. en
dc.language.iso en en
dc.relation http://www.aanda.org/index.php?option=article&access=standard&Itemid=129&url=/articles/aa/pdf/2002/47/aa2863.pdf en
dc.source ALOY, M.A. ; Ibanez Cabanell, Jose Maria ; Miralles, J.A. ; Urpin, V., 2002, Stability analysis of relativistic jets from collapsars and its implications on the short-term variability of gamma-ray bursts, Astronomy and Astrophysics, vol. 396, no. 2, p. 693-703 en
dc.subject Magnetohydradynamics (MHD) : Gamma rays ; Bursts ; Gamma ray theory ; ISM jets and outflows ; galaxies jets en
dc.title Stability analysis of relativistic jets from collapsars and its implications on the short-term variability of gamma-ray bursts en
dc.type info:eu-repo/semantics/article en
dc.type info:eu-repo/semantics/publishedVersion en
dc.subject.unesco UNESCO::ASTRONOMÍA Y ASTROFÍSICA en
dc.subject.unesco UNESCO::ASTRONOMÍA Y ASTROFÍSICA::Cosmología y cosmogonia en
dc.identifier.doi 10.1051/0004-6361:20021367 en
dc.description.private Ibanez Cabanell, Jose Maria, Jose.M.Ibanez@uv.es en
dc.identifier.idgrec 011933 en

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