The Rates of Hypernovae and Gamma-Ray Bursts: Implications for Their Progenitors | Zendy

Philipp Podsiadlowski | Zendy; P. A. Mazzali | Zendy; K. Nomoto | Zendy; Davide Lazzati | Zendy; E. Cappellaro | Zendy

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The Rates of Hypernovae and Gamma-Ray Bursts: Implications for Their Progenitors

Author(s) -

Philipp Podsiadlowski,

P. A. Mazzali,

K. Nomoto,

Davide Lazzati,

E. Cappellaro

Publication year - 2004

Publication title -

the astrophysical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.376

H-Index - 489

eISSN - 1538-4357

pISSN - 0004-637X

DOI - 10.1086/421347

Subject(s) - hypernova , supernova , gamma ray burst , astrophysics , physics , binary number , astronomy , mathematics , arithmetic

A critical comparison of estimates for the rates of hypernovae (HNe) andgamma-ray bursts (GRBs) is presented. Within the substantial uncertainties, theestimates are shown to be quite comparable and give a Galactic rate of$10^{-6}$ -- $10^{-5} $yr$^{-1}$ for both events. These rates are severalorders of magnitude lower than the rate of core-collapse supernovae, suggestingthat the evolution leading to a HN/GRB requires special circumstances, verylikely due to binary interactions. Various possible binary channels arediscussed, and it is shown that these are generally compatible with theinferred rates.Comment: Accepted by Astrophysical Journal Letters. 12 page

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