Rediscussion of extragalactic supernova rates derived from Evans's 1980-1988 observations
1994; IOP Publishing; Volume: 425; Linguagem: Inglês
10.1086/173975
ISSN1538-4357
AutoresSidney van den Bergh, R. D. McClure,
Tópico(s)Geophysics and Gravity Measurements
Resumoview Abstract Citations (97) References (25) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Rediscussion of Extragalactic Supernova Rates Derived from Evans's 1980--1988 Observations van den Bergh, Sidney ; McClure, Robert D. Abstract Supernova rates are derived from observations by Evans under the assumption that (1) the discovery probability of supernovae is independent of parent galaxy inclination and (2) supernovae of all types have luminosity functions of finite width at maximum light. For spirals of types Sab-Sd the total supernova rate is calculated to be ~1.3(H_0_/75)^2^ SNu. Modeling shows that symmetrical broadening of the luminosity functions of supernovae at maximum light does not change the supernova rates significantly from those computed from Evans's observations under the assumption that each type of supernova has a single value of M_V_(max). However, systematic shifts in the mean luminosities of supernovae (or changes in the amount of interstellar extinction) result in dramatic changes in the calculated supernova rates. The rate of core-collapse supernovae within 4 kpc of the Sun is calculated to be ~2.3(H_0_/75)^2^ per millennium. This rate is in excellent agreement with the fact that four such objects are known to have occurred within 4 kpc during the last 2000 years. Publication: The Astrophysical Journal Pub Date: April 1994 DOI: 10.1086/173975 Bibcode: 1994ApJ...425..205V Keywords: Astrophysics; Intergalactic Media; Mathematical Models; Numerical Analysis; Spiral Galaxies; Supernovae; Visual Observation; Hubble Constant; Light Curve; Red Shift; Stellar Luminosity; Astrophysics; STARS: SUPERNOVAE: GENERAL full text sources ADS | data products SIMBAD (8)
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