Electron acceleration in relativistic gamma-ray burst shocks / Medvedev Mikhail V. // ASTROPHYSICAL JOURNAL. - 2006. - V. 651, l. 1, 2. - P. L9-L11.

ISSN/EISSN:

0004-637X / нет данных

Type:

Article

Abstract:

The shock model of gamma-ray bursts (GRBs) contains two equipartition parameters: the magnetic energy density and the kinetic energy density of the electrons relative to the total energy density of the shock, and is an element of(e), respectively. These are free parameters within the model. Whereas the Weibel shock theory and numerical simulations fix is an element of(B) at the level of a few times 10(-3) to 10(-4), no understanding of epsilon(e) exists so far. Here we demonstrate that it inevitably follows from the theory that is an element of(e) similar or equal to (is an element of(B))(1/2). The GRB afterglow data fully agree with this theoretical prediction. Our result explains why the electrons are close to equipartition in GRBs. The relation can is an element of(e)-is an element of(B) potentially be used to reduce the number of free parameters in afterglow models.

Author keywords:

gamma rays : bursts; magnetic fields; shock waves MAGNETIC-FIELD GENERATION; WIND-INTERACTION-MODELS; PARTICLE-ACCELERATION; WEIBEL INSTABILITY; AFTERGLOWS; GRB-980703; EVOLUTION; EMISSION; PARAMETERS; JETS

DOI:

10.1086/509075

Web of Science ID:

ISI:000241824700003

Соавторы в МНС:

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Другие поля

Поле	Значение
Month	NOV 1
Publisher	UNIV CHICAGO PRESS
Address	1427 E 60TH ST, CHICAGO, IL 60637-2954 USA
Language	English
Keywords-Plus	MAGNETIC-FIELD GENERATION; WIND-INTERACTION-MODELS; PARTICLE-ACCELERATION; WEIBEL INSTABILITY; AFTERGLOWS; GRB-980703; EVOLUTION; EMISSION; PARAMETERS; JETS
Research-Areas	Astronomy \& Astrophysics
Web-of-Science-Categories	Astronomy \& Astrophysics
Number-of-Cited-References	24
Usage-Count-Since-2013	4
Journal-ISO	Astrophys. J.
Doc-Delivery-Number	102PN