Surman, R. 2011 伽马暴吸积盘上的Ni56的核合成

主要内容:


精彩摘抄:


文章信息:

· Find Similar Abstracts (with default settings below)

· Electronic Refereed Journal Article (HTML)

· Full Refereed Journal Article (PDF/Postscript)

· arXiv e-print (arXiv:1112.2673)

· References in the article

· SIMBAD Objects (3)

· Also-Read Articles (Reads History)

·

· Translate This Page

Title:		Nucleosynthesis of Nickel-56 from Gamma-Ray Burst Accretion Disks
Authors:		Surman, R.; McLaughlin, G. C.; Sabbatino, N.
Affiliation:		AA(Department of Physics and Astronomy, Union College, Schenectady, NY 12308, USA ), AB(Department of Physics, North Carolina State University, Raleigh, NC 27695-8202, USA), AC(Department of Physics and Astronomy, Union College, Schenectady, NY 12308, USA )
Publication:		The Astrophysical Journal, Volume 743, Issue 2, article id. 155 (2011). (ApJ Homepage)
Publication Date:		12/2011
Origin:		IOP
Astronomy Keywords:		accretion, accretion disks, gamma-ray burst: general, nuclear reactions, nucleosynthesis, abundances
DOI:		10.1088/0004-637X/743/2/155
Bibliographic Code:		2011ApJ...743..155S

Abstract

We examine the prospects for producing nickel-56 from black hole accretion disks, by examining a range of steady-state disk models. We focus on relatively slowly accreting disks in the range of \dot{M} = 0.05 M _☉ s^-1 to \dot{M} = 1 M _☉ s^-1, as are thought to be appropriate for the central engines of long-duration gamma-ray bursts. We find that significant amounts of nickel-56 are produced over a wide range of parameter space. We discuss the influence of entropy, outflow timescale, and initial disk position on mass fraction of nickel-56 which is produced. We keep careful track of the weak interactions to ensure reliable calculations of the electron fraction, and discuss the role of the neutrinos.

---

Bibtex entry for this abstract   Preferred format for this abstract (see Preferences)