Abstract
Recently, the first association between an ultra-long gamma-ray burst (GRB) and a supernova was reported, I.e., GRB 111209A/SN 2011kl, enabling us to investigate the physics of central engines or even progenitors for ultra-long GRBs. In this paper, we inspect the broadband data of GRB 111209A/SN 2011kl. The late-time X-ray light curve exhibits a GRB 121027A-like fallback bump, suggesting a black hole (BH) central engine. We thus propose a collapsar model with fallback accretion for GRB 111209A/SN 2011kl. The required model parameters, such as the total mass and radius of the progenitor star, suggest that the progenitor of GRB 111209A is more likely a Wolf-Rayet star instead of a blue supergiant, and the central engine of this ultra-long burst is a BH. The implications of our results are discussed.
- Publication:
-
The Astrophysical Journal, Volume 826, Issue 2, article id. 141,
6 pp. (2016). - Pub Date:
- August 2016
- DOI:
- 10.3847/0004-637X/826/2/141
- arXiv:
- arXiv:1605.04660
- Bibcode:
- 2016ApJ...826..141G
- Keywords:
-
- accretion;
- accretion disks;
- black hole physics;
- gamma-ray burst: individual: GRB 111209A;
- Astrophysics - High Energy Astrophysical Phenomena
- E-Print Comments:
- Accepted for publication in ApJ; doi:10.3847/0004-637X/826/2/141