A black hole–white dwarf compact binary model for long gamma-ray bursts without supernova association. (30th January 2018)

• Record Type: Journal Article
• Authors: Dong, Yi-Ze; Gu, Wei-Min; Liu, Tong; Wang, Junfeng
• Is Part Of: Monthly notices of the Royal Astronomical Society. Volume 475:Number 1(2018:Mar.)
• Page Start: L101
• Page End: L105
• Publication Date: 2018-01-30
• Subjects: accretion, accretion discs -- gamma-ray burst: general -- white dwarfs; Astronomy -- Research -- Periodicals; Periodicals; 520.5
• DOI: 10.1093/mnrasl/sly014
• Languages: English
• ISSNs: 1745-3933

Abstract

Abstract: Gamma-ray bursts (GRBs) are luminous and violent phenomena in the Universe. Traditionally, long GRBs are expected to be produced by the collapse of massive stars and associated with supernovae. However, some low-redshift long GRBs have no detection of supernova association, such as GRBs 060505, 060614, and 111005A. It is hard to classify these events convincingly according to usual classifications, and the lack of the supernova implies a non-massive star origin. We propose a new path to produce long GRBs without supernova association, the unstable and extremely violent accretion in a contact binary system consisting of a stellar-mass black hole and a white dwarf, which fills an important gap in compact binary evolution.