PMO OpenIR  > 宇宙伽马暴、中子星及相关物理研究团组
Ultraviolet/optical emission accompanying gamma-ray bursts
Fan, YZ; Wei, DM
2004-07-11
Source PublicationMONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
ISSN0035-8711
Volume351Issue:1Pages:292-296
AbstractWe discuss the possible simultaneously ultraviolet (UV)/optical emission accompanying gamma-ray bursts (GRBs). We show that as long as the intrinsic spectrum of GRBs can extend to similar to10 GeV or higher, there are large amounts of relativistic e(+/-) pairs generated due to the annihilation of soft gamma-rays with very energetic photons, which dominates over the electrons/positrons associated with the fireball, whether the fireball is highly magnetized or not (for the highly magnetized fireball, the magnetic field is ordered, high linear polarization of multiwavelength emission is expected). We find that these e pairs can power a UV flash with m similar or equal to 12-13 mag, and the corresponding optical emission can be up to m(R) similar or equal to 15-16 mag. Such bright UV emission will be able to be detected by the satellite Swift, planned for launch in 2004. The behaviour of the optical-UV spectrum (F(v) proportional to v(5/2)) differs significantly from that of the reverse shock emission (F(v) proportional to v(-beta/2), beta similar or equal to 2.2), which is a signature of the emission accompanying the GRB. Mild optical emission can be detected with the ROTSE-IIIa telescope system, if the response to the GRB alert is fast enough.
KeywordRadiation Mechanisms : Non-thermal Gamma-rays : Bursts
Subject AreaAstronomy & Astrophysics
WOS HeadingsScience & Technology ; Physical Sciences
WOS KeywordOPTICAL FLASH ; AFTERGLOWS ; RADIATION ; SHOCKS ; POLARIZATION ; VARIABILITY ; DURATION ; SPECTRUM ; OUTFLOW ; MODELS
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000222184100033
Citation statistics
Cited Times:9[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/7749
Collection宇宙伽马暴、中子星及相关物理研究团组
Affiliation1.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Peoples R China
2.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China
Recommended Citation
GB/T 7714
Fan, YZ,Wei, DM. Ultraviolet/optical emission accompanying gamma-ray bursts[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2004,351(1):292-296.
APA Fan, YZ,&Wei, DM.(2004).Ultraviolet/optical emission accompanying gamma-ray bursts.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,351(1),292-296.
MLA Fan, YZ,et al."Ultraviolet/optical emission accompanying gamma-ray bursts".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 351.1(2004):292-296.
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