|
| | | | |
| | | |
| Stat |
Members: 3645
Articles: 2'506'133
Articles rated: 2609
26 April 2024 |
|
| | | | |
|
Article overview
| |
|
|
Helium Star/Black Hole Mergers: a New Gamma-Ray Burst Model | | C.L. Fryer
; S.E. Woosley
; | | Date: |
17 Apr 1998 | | Subject: | astro-ph | | Affiliation: | Lick Observatory UCSC | | Abstract: | We present a model for gamma-ray bursts (GRB’s) in which a stellar mass black hole acquires a massive accretion disk by merging with the helium core of its red giant companion. The black hole enters the helium core after it, or its neutron star progenitor, first experiences a common envelope phase that carries it inwards through the hydrogen envelope. Accretion of the last several solar masses of helium occurs on a time scale of roughly a minute and provides a neutrino luminosity of approximately 10^51 - 10^52 erg/s. Neutrino annihilation, 0.01% to 0.1% efficient, along the rotational axis then gives a baryon loaded fireball of electron-positron pairs and radiation (about 10$^{50}$ erg total) whose beaming and relativistic interaction with circumstellar material makes the GRB (e.g., Rees & Meszaros 1992). The useful energy can be greatly increased if energy can be extracted from the rotational energy of the black hole by magnetic interaction with the disk. Such events should occur at a rate comparable to that of merging neutron stars and black hole neutron star pairs and may be responsible for long complex GRB’s, but not short hard ones. | | Source: | arXiv, astro-ph/9804167 | | Services: | Forum | Review | PDF | Favorites | |
|
|
No review found.
Did you like this article?
Note: answers to reviews or questions about the article must be posted in the forum section.
Authors are not allowed to review their own article. They can use the forum section.
browser Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)
|
| |
|
|
|
|
News, job offers and information for researchers and scientists:
| |
REGISTER