Berger 2003 Ib/Ic 超新星的射电统计

主要内容:


精彩摘抄:


文章信息:

· Electronic Refereed Journal Article (HTML)

· Full Refereed Journal Article (PDF/Postscript)

· arXiv e-print (arXiv:astro-ph/0307228)

· References in the article

· Citations to the Article (51) (Citation History)

· Refereed Citations to the Article

· SIMBAD Objects (71)

· NED Objects (105)

· Also-Read Articles (Reads History)

· HEP/Spires Information

·

· Translate This Page

Title:		A Radio Survey of Type Ib and Ic Supernovae: Searching for Engine-driven Supernovae
Authors:		Berger, E.; Kulkarni, S. R.; Frail, D. A.; Soderberg, A. M.
Publication:		The Astrophysical Journal, Volume 599, Issue 1, pp. 408-418. (ApJ Homepage)
Publication Date:		12/2003
Origin:		UCP
ApJ Keywords:		Gamma Rays: Bursts, Radio Continuum: Stars, Stars: Supernovae: General
Abstract Copyright:		(c) 2003: The American Astronomical Society
DOI:		10.1086/379214
Bibliographic Code:		2003ApJ...599..408B

Abstract

The association of γ-ray bursts (GRBs) and core-collapse supernovae (SNe) of Type Ib and Ic was motivated by the detection of SN 1998bw in the error box of GRB 980425 and the now secure identification of SN 2003dh in the cosmological GRB 030329. The bright radio emission from SN 1998bw indicated that it possessed some of the unique attributes expected of GRBs, namely, a large reservoir of energy in (mildly) relativistic ejecta and variable energy input. The two popular scenarios for the origin of SN 1998bw are a typical cosmological burst observed off-axis or a member of a new distinct class of supernova explosions. In the former, about 0.5% of local Type Ib/c SNe are expected to be similar to SN 1998bw; for the latter no such constraint exists. Motivated thus, we began a systematic program of radio observations of most reported Type Ib/c SNe accessible to the Very Large Array. Of the 33 SNe observed from late 1999 to the end of 2002, at most one is as bright as SN 1998bw. From this we conclude that the incidence of such events is <~3%. Furthermore, analysis of the radio emission indicates that none of the observed SNe exhibit clear engine signatures. Finally, a comparison of the SN radio emission to that of GRB afterglows indicates that none of the SNe could have resulted from a typical GRB, independent of the initial jet orientation. Thus, while the nature of SN 1998bw remains an open question, there appears to be a clear dichotomy between the majority of hydrodynamic and engine-driven explosions.

---

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