GRB 221009A with an Unconventional Precursor: A Typical Two-stage Collapsar Scenario?

• Published in: The Astrophysical journal Vol. 957; no. 1; pp. 31 - 39
• Main Authors: Song, Xin-Ying, Zhang, Shuang-Nan
• Format: Journal Article
• Language: English
• Published: Philadelphia The American Astronomical Society 01.11.2023; IOP Publishing
• Subjects: Accretion disks; Astrophysics; Collapsars; Emission; Gamma ray bursts; Gamma rays; Lorentz factor; Luminosity; Precursors; Star formation

As the brightest gamma-ray burst (GRB) ever detected, GRB 221009A may offer a chance that reveals some interesting features that are hidden in those bursts that are not so bright. There seems to be a very weak emission with a flux of 10 −8 ∼ 10 −7 erg cm −2 s −1 between the first pulse ( T 0 ∼ T 0 +...