Revised supernova rates in Shapley-Ames galaxies

Revised supernova rates in Shapley-Ames galaxies

Observations of 855 Shapley Ames galaxies made from November 1, 1980 to October 31, 1988, together with improved supernova luminosities, have been used to derive the frequency of supernovae of different types, and the results are presented in tables. From a uniform database of 24 supernovae discover...

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Veröffentlicht in:The Astrophysical journal 1989-10, Vol.345 (2), p.752-758
Hauptverfasser: EVANS, R, VAN DEN BERGH, S, MCCLURE, R. D
Format: Artikel
Sprache:eng
Schlagworte:
640102 - Astrophysics & Cosmology- Stars & Quasi-Stellar, Radio & X-Ray Sources
Astronomy
CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
CLASSIFICATION
Earth, ocean, space
ERUPTIVE VARIABLE STARS
Exact sciences and technology
GALAXIES
Late stages of stellar evolution (including black holes)
LUMINOSITY
MATHEMATICS
OPTICAL PROPERTIES
PHYSICAL PROPERTIES
STARS
STATISTICS
SUPERNOVAE
VARIABLE STARS
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Zusammenfassung:Observations of 855 Shapley Ames galaxies made from November 1, 1980 to October 31, 1988, together with improved supernova luminosities, have been used to derive the frequency of supernovae of different types, and the results are presented in tables. From a uniform database of 24 supernovae discovered, the following SN rates are found, expressed in SN per century per 10 to the 10th L(B)(solar): SN Ia, 0.3; SN Ib, 0.3; and SN II, 1.0. The present data confirm the relatively high frequency of SN II in late-type galaxies that has been found by many previous investigators. 12 refs.
ISSN:0004-637X
1538-4357
DOI:10.1086/167946