The shallow-decay phase in both the optical and X-ray afterglows of Swift GRB 090529A: energy injection into a wind-type medium?
文献类型：期刊论文
| 作者 | Xin, L. P.1 ; Pozanenko, A.2; Kann, D. A.3; Xu, D.4; Gorosabel, J.; Leloudas, G.4; Wei, J. Y.1; Andreev, M.5,6; Qin, S. F.1; Ibrahimov, M.7
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| 刊名 | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
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| 出版日期 | 2012-05-01 |
| 卷号 | 422期号:3页码:2044-2050 |
| 关键词 | gamma-ray burst: general gamma-ray burst: individual: GRB 090529A |
| 英文摘要 | The energy injection model is the usual choice for interpreting the shallow-decay phase in Swift gamma-ray burst (GRB) X-ray afterglows. However, very few GRBs have simultaneous signatures of energy injection in their optical and X-ray afterglows. Here, we report on the optical observations of GRB 090529A from 2000 s to similar to 106 s after the burst, in which an achromatic decay is seen at both wavelengths. The optical light curve shows a decay from 0.37 to 0.99, with a break at similar to 105 s. In the same time interval, the decay indices of the X-ray light curve changed from 0.04 to 1.2. Comparing these values with the closure relations, the segment after 3 x 104 s is consistent with the prediction of the forward shock in an interstellar medium without any energy injection. The shallow-decay phase between 2000 and 3 x 104 s could be a result of the external shock in a wind-type medium with an energy injection under the condition of nu(o) < nu c < nu x. However, the constraint of the spectral region is not consistent with the multiband observations. For this shallow-decay phase, other models are also possible, such as energy injection with evolving microphysical parameters, a jet viewed off-axis, etc. |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000303858400015 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/6277]  |
| 专题 | 国家天文台_空间科学研究部 |
| 作者单位 | 1.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China 2.Space Res Inst IKI, Moscow 117997, Russia 3.Thuringer Landessternwarte Tautenburg, D-07778 Tautenburg, Germany 4.Univ Copenhagen, Niels Bohr Inst, Dark Cosmol Ctr, DK-2100 Copenhagen, Denmark 5.RAS, Inst Astron, Terskol Branch, Kabardino Balkaria Repub 361605, Russia 6.NASU, Int Ctr Astron & Med Ecol Res, UA-03680 Kiev, Ukraine 7.Ulugh Beg Astron Inst, Tashkent 700052, Uzbekistan 8.Moscow MV Lomonosov State Univ, Sternberg Astron Inst, Moscow 119992, Russia 9.Univ Iceland, Inst Sci, Ctr Astrophys & Cosmol, IS-107 Reykjavik, Iceland 10.Inst Astrofis Andalucia IAA CSIC, Observ Sierra Nevada, Granada 18080, Spain |
| 推荐引用方式 GB/T 7714 | Xin, L. P.,Pozanenko, A.,Kann, D. A.,et al. The shallow-decay phase in both the optical and X-ray afterglows of Swift GRB 090529A: energy injection into a wind-type medium?[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2012,422(3):2044-2050. |
| APA | Xin, L. P..,Pozanenko, A..,Kann, D. A..,Xu, D..,Gorosabel, J..,...&Wu, C..(2012).The shallow-decay phase in both the optical and X-ray afterglows of Swift GRB 090529A: energy injection into a wind-type medium?.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,422(3),2044-2050. |
| MLA | Xin, L. P.,et al."The shallow-decay phase in both the optical and X-ray afterglows of Swift GRB 090529A: energy injection into a wind-type medium?".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 422.3(2012):2044-2050. |
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来源：国家天文台
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