GRB071112C: A case study of different mechanisms in X-ray and optical temporal evolution

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題名:	GRB071112C: A case study of different mechanisms in X-ray and optical temporal evolution
作者:	葉永烜;Huang, K. Y.;Urata, Y.;Tung, Y. H.;Lin, H. M.;Xin, L. P.;Yoshida, M.;Zheng, W.;Akerlof, C.;Wang, S. Y.;Ip, W. H.;Lehner, M. J.;Bianco, F. B.;Kawai, N.;Kuroda, D.;Marshall, S. L.;Schwamb, M. E.;Qiu, Y.;Wang, J. H.;Wen, C. Y.;Wei, J.;Yanagisawa, K.;Zhang, Z. W.
貢獻者:	理學院天文研究所
關鍵詞:	Afterglows;Astronomy;ASTROPHYSICS, COSMOLOGY AND ASTRONOMY;COLOR;COMPTON EFFECT;COSMIC GAMMA BURSTS;Decay;Earth, ocean, space;Emission analysis;Evolution;Exact sciences and technology;Flux;Mathematical models;STAR EVOLUTION;Temporal logic;VISIBLE RADIATION;X RADIATION;X-rays
日期:	2012-03-20
上傳時間:	2026-04-21 14:12:49 (UTC+8)
出版者:	IOP Publishing Ltd.;Bristol: IOP
摘要:	摘要： We present a study on GRB 071112C X-ray and optical light curves. In these two wavelength ranges, we have found different temporal properties. The R-band light curve showed an initial rise followed by a single power-law decay, while the X-ray light curve was described by a single power-law decay plus a flare-like feature. Our analysis shows that the observed temporal evolution cannot be described by the external shock model in which the X-ray and optical emission are produced by the same emission mechanism. No significant color changes in multi-band light curves and a reasonable value of the initial Lorentz factor ([Gamma] sub(0) = 275 + or - 20) in a uniform interstellar medium support the afterglow onset scenario as the correct interpretation for the early R band rise. The result suggests that the optical flux is dominated by afterglow. Our further investigations show that the X-ray flux could be created by an additional feature related to energy injection and X-ray afterglow. Different theoretical interpretations indicate the additional feature in X-ray can be explained by either late internal dissipation or local inverse-Compton scattering in the external shock. 出版者： Bristol: IOP 出版日期： 2012-03-20 出處： The Astrophysical journal, 2012-03, Vol.748 (1), p.44-7 資源來源： Institute of Physics Journals 版權： 2015 INIST-CNRS 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/748/1/44 識別號： CODEN: ASJOAB
顯示於類別:	[天文研究所] 期刊論文

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