GRB physics with Fermi / Medvedev Mikhail V. // . - 2009. - V. 1133, l. . - P. 300-305.

ISSN/EISSN:

0094-243X / нет данных

Type:

Proceedings Paper

Abstract:

Radiation from GRBs in the prompt phase, flares and an afterglow is thought to be produced by accelerated electrons in magnetic fields. Such emission may be produced at collisionless shocks of baryonic outflows or at reconnection sites (at least for the prompt and flares) of the magnetically dominated (Poynting flux driven) outflows, where no shocks presumably form at all. An astonishing recent discovery is that during reconnection strong small-scale magnetic fields are produced via the Weibel instability, very much like they are produced at relativistic shocks. The relevant physics has been successfully and extensively studied with the PIC simulations in 2D and, to some extent, in 3D for the past few years. We discuss how these simulations predict the existence of MeV-range synchrotron/jitter emission in some GRBs, which can be observed with Fermi. Recent results on modeling of the spectral variability and spectral correlations of the GRB prompt emission in the Weibel-jitter paradigm applicable to both baryonic and magnetic-dominated outflows is reviewed with the emphasis on observational predictions.

Author keywords:

gamma-ray bursts; shocks; magnetic fields; particle acceleration; radiation MAGNETIC-FIELD GENERATION; RELATIVISTIC COLLISIONLESS SHOCKS; RAY BURST AFTERGLOWS; PARTICLE-ACCELERATION; JITTER RADIATION; PROMPT EMISSION; EVOLUTION; MODELS

DOI:

нет данных

Web of Science ID:

ISI:000267717300073

Соавторы в МНС:

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Другие поля

Поле	Значение
Editor	Meegan, C and Gehrels, N and Kouveliotou, C
Booktitle	GAMMA-RAY BUSTS
Series	AIP Conference Proceedings
Note	6th Huntsville Symposium on Gamma-Ray Burst, Huntsville, AL, OCT 20-23, 2008
Organization	Gamma Ray Burst Monitor; Swift; Univ Alabama; Curry Fdn
Publisher	AMER INST PHYSICS
Address	2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
Language	English
ISBN	978-0-7354-0670-4
Keywords-Plus	MAGNETIC-FIELD GENERATION; RELATIVISTIC COLLISIONLESS SHOCKS; RAY BURST AFTERGLOWS; PARTICLE-ACCELERATION; JITTER RADIATION; PROMPT EMISSION; EVOLUTION; MODELS
Research-Areas	Astronomy \& Astrophysics
Web-of-Science-Categories	Astronomy \& Astrophysics
Number-of-Cited-References	18
Doc-Delivery-Number	BKC01