Hydrodynamical Effects in Internal Shock of Relativistic Outflows

Content Provider	Semantic Scholar
Author	Kino, Motoki Mizuta, Akira Yamada, Shoichi
Copyright Year	2004
Abstract	We study both analytically and numerically hydrodynamical effects of two colliding shells, the simplified models of the internal shock in various relativistic outflows such as gamma-ray bursts and blazars. We pay particular attention to three interesting cases: a pair of shells with the same rest mass density (“equal rest mass density”), a pair of shells with the same rest mass (“equal mass”), and a pair of shells with the same bulk kinetic energy (“equal energy”) measured in the intersteller medium (ISM) frame. We find that the density profiles are significantly affected by the propagation of rarefaction waves. A split-feature appears at the contact discontinuity of two shells for the “equal mass” case, while no significant split appears for the “equal energy” and “equal rest mass density” cases. The shell spreading with a few ten percent of the speed of light is also shown as a notable aspect caused by rarefaction waves. The conversion efficiency of the bulk kinetic energy to internal one is numerically evaluated. The time evolutions of the efficiency show deviations from the widely-used inellastic two-point-mass-collision model. Subject headings: galaxies: jet — gamma rays: bursts — gamma rays: theory — radiation mechanisms: non-thermal — shock waves
File Format	PDF HTM / HTML
Alternate Webpage(s)	http://arxiv.org/pdf/astro-ph/0404555v1.pdf
Language	English
Access Restriction	Open
Subject Keyword	Gamma correction Implicit Shape Model Indolent Systemic Mastocytosis Interferon Type II Kinetics Mass Density Medical Subject Headings Medium-chain acyl-coenzyme A dehydrogenase deficiency Numerical analysis Rajiformes Recombinant Interferon-gamma Reflections of signals on conducting lines Shock Software propagation collision
Content Type	Text
Resource Type	Article