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A Progress Report on Supernova Statistics

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Supernovae

Part of the book series: Astrophysics and Space Science Library ((ASSL,volume 66))

Abstract

The Galactic SN rate is estimated from historical SNe to be τ = 15 (+15, −5) yr. SN frequencies in external galaxies arc determined for a distance-limited subsample of Shapley-Ames galaxies and the frequencies are expressed per unit luminosity for different types of galaxies. It is confirmed that the inclination of (Sc) spirals discriminates against the discovery of SNe. The frequency of Type II SNe correlates well with the galaxy color, whereas the frequency of Type I’s does not. Absolute magnitudes of sample SNe are determined, and SNe in very late-type galaxies are found to be overluminous. The properties and possible precursors of SNe of Type I and II are briefly discussed. Type II belongs to the very young population and Type I to the interarm population. It is speculated that all SNe may lie in close binaries.

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© 1977 D. Reidel Publishing Company, Dordrecht-Holland

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Tammann, G.A. (1977). A Progress Report on Supernova Statistics. In: Schramm, D.N. (eds) Supernovae. Astrophysics and Space Science Library, vol 66. Springer, Dordrecht. https://doi.org/10.1007/978-94-010-1229-4_10

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  • DOI: https://doi.org/10.1007/978-94-010-1229-4_10

  • Publisher Name: Springer, Dordrecht

  • Print ISBN: 978-94-010-1231-7

  • Online ISBN: 978-94-010-1229-4

  • eBook Packages: Springer Book Archive

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