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Steep Decay Phase Shaped by the Curvature Effect. II. Spectral Evolution
Lin, Da-Bin1,2; Mu, Hui-Jun1,2,3; Liang, Yun-Feng4; Liu, Tong3; Gu, Wei-Min3; Lu, Rui-Jing1,2; Wang, Xiang-Gao1,2; Liang, En-Wei1,2
2017-05-10
Source PublicationASTROPHYSICAL JOURNAL
ISSN0004-637X
Volume840Issue:2Pages:11
Abstract

We derive a simple analytical formula to describe the evolution of spectral index beta in the steep decay phase shaped by the curvature effect with the. assumption that the spectral parameters and Lorentz factor of the. jet shell are. the same for different latitudes. Here, the value of beta is estimated in the 0.3-10 keV energy band. For a spherical thin shell with a cutoff power-law (CPL) intrinsic radiation spectrum, the spectral evolution can be read as a linear function of observer time. For the situation with the. Band function intrinsic radiation spectrum, the spectral evolution may be complex. If the observed break energy of the. radiation spectrum is larger than 10 keV, the spectral evolution is the same as that shaped by jet shells with a CPL spectrum. If the observed break energy is less than 0.3 keV, the value of beta would be a constant. For others, the spectral evolution can be approximated as a logarithmal function of the observer time in general.

Keywordgamma-ray burst: general
DOI10.3847/1538-4357/aa6d77
WOS KeywordGAMMA-RAY BURSTS ; SWIFT XRT DATA ; LIGHT CURVES ; RELATIVISTIC TURBULENCE ; PROMPT EMISSION ; MODEL ; AFTERGLOW ; JETS ; VARIABILITY ; SIMULATIONS
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000401330100031
PublisherIOP PUBLISHING LTD
Citation statistics
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/23079
Collection中国科学院紫金山天文台
Corresponding AuthorLin, Da-Bin
Affiliation1.Guangxi Univ, GXU NAOC Ctr Astrophys & Space Sci, Dept Phys, Nanning 530004, Peoples R China
2.Guangxi Univ, Dept Phys, Guangxi Key Lab Relativist Astrophys, Nanning 530004, Peoples R China
3.Xiamen Univ, Dept Astron, Xiamen 361005, Fujian, Peoples R China
4.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Jiangsu, Peoples R China
Recommended Citation
GB/T 7714
Lin, Da-Bin,Mu, Hui-Jun,Liang, Yun-Feng,et al. Steep Decay Phase Shaped by the Curvature Effect. II. Spectral Evolution[J]. ASTROPHYSICAL JOURNAL,2017,840(2):11.
APA Lin, Da-Bin.,Mu, Hui-Jun.,Liang, Yun-Feng.,Liu, Tong.,Gu, Wei-Min.,...&Liang, En-Wei.(2017).Steep Decay Phase Shaped by the Curvature Effect. II. Spectral Evolution.ASTROPHYSICAL JOURNAL,840(2),11.
MLA Lin, Da-Bin,et al."Steep Decay Phase Shaped by the Curvature Effect. II. Spectral Evolution".ASTROPHYSICAL JOURNAL 840.2(2017):11.
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