Synchrotron self-inverse compton radiation from reverse shock on GRB 120326A

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题名:	Synchrotron self-inverse compton radiation from reverse shock on GRB 120326A
作者:	浦田裕次;Urata, Yuji;Huang, Kuiyun;Takahashi, Satoko;Im, Myungshin;Yamaoka, Kazutaka;Tashiro, Makoto;Kim, Jae-Woo;Jang, Minsung;Pak, Soojong
贡献者:	理學院天文研究所
关键词:	AFTERGLOW;Afterglows;Arrays;ASTROPHYSICS, COSMOLOGY AND ASTRONOMY;BENCHMARKS;COSMIC GAMMA BURSTS;DECAY;DETECTION;EXPLOSIONS;GHZ RANGE;KEV RANGE;Mathematical models;RELATIVISTIC RANGE;Shape memory alloys;SIMULATION;Spectra;SYNCHROTRON RADIATION;Synchrotrons;Temporal logic;TWO-DIMENSIONAL CALCULATIONS;VISIBLE RADIATION;WAVELENGTHS;X RADIATION;X-rays
日期:	2014-07-10
上传时间:	2026-04-21 14:27:43 (UTC+8)
出版者:	IOP Publishing Ltd.;United States
摘要:	摘要： We present multi-wavelength observations of a typical long duration GRB 120326A at z = 1.798, including rapid observations using a Submillimeter Array (SMA) and a comprehensive monitoring in the X-ray and optical. The SMA observation provided the fastest detection to date among seven submillimeter afterglows at 230 GHz. The prompt spectral analysis, using Swift and Suzaku, yielded a spectral peak energy of E super(src) sub(peak) = 107.8 super(+15.3) sub(-15.3) keV and an equivalent isotropic energy of E sub(iso) as 3.18 super(+0.40) sub(-0.32) x 10 super(52) erg. The temporal evolution and spectral properties in the optical were consistent with the standard forward shock synchrotron with jet collimation (6[degrees].69 + or - 0[degrees].16). The forward shock modeling, using a two-dimensional relativistic hydrodynamic jet simulation, was also determined by the reasonable burst explosion and the synchrotron radiation parameters for the optical afterglow. The X-ray light curve showed no apparent jet break and the temporal decay index relation between the X-ray and optical ([alpha]o - [alpha] sub(X) = -1.45 + or - 0.10) indicated different radiation processes in each of them. Introducing synchrotron self-inverse Compton radiation from reverse shock is a possible solution, and the detection and slow decay of the afterglow in submillimeter supports that this is a plausible idea. The observed temporal evolution and spectral properties, as well as forward shock modeling parameters, enabled us to determine reasonable functions to describe the afterglow properties. Because half of the events share similar properties in the X-ray and optical as the current event, GRB 120326A will be a benchmark with further rapid follow-ups, using submillimeter instruments such as an SMA and the Atacama Large Millimeter/submillimeter Array. 出版者： United States 出版日期： 2014-07-10 出處： The Astrophysical journal, 2014-07, Vol.789 (2), p.146-8 資源來源： Institute of Physics Journals 識別號： ISSN: 0004-637X 識別號： ISSN: 1538-4357 識別號： EISSN: 1538-4357 識別號： DOI: 10.1088/0004-637X/789/2/146
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