MacFadyen, A. I. (2003) Collapsar Disks and Winds. In: Gamma-ray burst and afterglow astronomy 2001. AIP Conference Proceedings. No.662. American Institute of Physics , Melville, NY, pp. 202-205. ISBN 0-7354-0122-5 http://resolver.caltech.edu/CaltechAUTHORS:20111012-133811711
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Winds blown from collapsar accretion disks may produce observable stellar explosions independent of any GRB-(and afterglow)-producing jets which may be simultaneously produced. The production of winds is controlled by the accretion disk physics, in particular, the nature of disk cooling via neutrino emission and photo-disintegration of heavy nuclei. These temperature-dependent processes depend on the stellar angular momentum via the depth of the gravitational potential at the Kepler radius where the disk forms. Wind-driven stellar explosions which do not make a GRB (or only a faint one) may occur and constitute a new class of supernova explosion. SN1998bw and 1997ef may be examples. A key feature of collapsar winds is that they are capable of producing the radioactive ^(56)Ni necessary to power a supernova light curve. It is possible to make a GRB in a star without significant production of ^(56)Ni. Such a star would not make an observable supernova and no such component would be expected in the light curve of the optical afterglow.
|Item Type:||Book Section|
|Additional Information:||© 2003 American Institute of Physics. Issue Date: 14 April 2003.|
|Subject Keywords:||accretion disks, black holes, supernovae, gamma-ray sources (astronomical), afterglows, jets, wind|
|Classification Code:||PACS: ◦7.60.Bw; 98.70.Rz; 97.60.Lf|
|Official Citation:||Collapsar Disks and Winds A. I. MacFadyen, AIP Conf. Proc. 662, 202 (2003), DOI:10.1063/1.1579338|
|Usage Policy:||No commercial reproduction, distribution, display or performance rights in this work are provided.|
|Deposited By:||Tony Diaz|
|Deposited On:||13 Oct 2011 21:51|
|Last Modified:||26 Dec 2012 14:16|
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