FAILED GAMMA-RAY BURSTS: THERMAL ULTRAVIOLET/SOFT X-RAY EMISSION ACCOMPANIED BY PECULIAR AFTERGLOWS

Journal Article · Fri Feb 10 00:00:00 EST 2012 · Astrophysical Journal

DOI:https://doi.org/10.1088/0004-637X/746/1/49· OSTI ID:22011808

Xu, M; Huang, Y F ^[1]; Nagataki, S

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1. Department of Astronomy, Nanjing University, Nanjing 210093 (China)

We show that the photospheres of 'failed' gamma-ray bursts (GRBs), whose bulk Lorentz factors are much lower than 100, can be outside of internal shocks. The resulting radiation from the photospheres is thermal and bright in the UV/soft X-ray band. The photospheric emission lasts for about 1000 s with a luminosity about several times 10{sup 46} erg s{sup -1}. These events can be observed by current and future satellites. It is also shown that the afterglows of failed GRBs are peculiar at the early stage, which makes it possible to distinguish failed GRBs from ordinary GRBs and beaming-induced orphan afterglows.

• OSTI ID: 22011808
• Journal Information: Astrophysical Journal, Vol. 746, Issue 1; Other Information: Country of input: International Atomic Energy Agency (IAEA); ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
AFTERGLOW
COSMIC GAMMA BURSTS
LUMINOSITY
PHOTOSPHERE
SOFT X RADIATION
ULTRAVIOLET RADIATION