The supernova rate in Shapley-Ames galaxies

Details The supernova rate in Shapley-Ames galaxies The supernova rate in Shapley-Ames galaxies

Dec 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987apj...323...44v&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 323, Dec. 1, 1987, p. 44-53.

Astronomy and Astrophysics

Astronomy

124

Galactic Structure, Stellar Evolution, Supernovae, Data Bases, Light Curve, Local Group (Astronomy), Star Distribution

Scientific paper

During a 5 yr period R. Evans has carried out a visual search for supernovae in 1017 bright galaxies. The subsample comprising 748 Shapley-Ames galaxies surveyed by him constitutes a homogeneous data base that is suitable for a determination of the supernova rate. For the supernova rates recently derived by Tammann one would have expected 54 supernovae to have been observed in the sample. In fact, Evans found only 11. The authors conclude from their observations that Tammann's supernova rates are probably too high by a factor of ≡3. They also find that the majority of Galactic supernova remnants must have been produced by massive progenitors.

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