Supernovae in the Coma cluster of galaxies

Details Supernovae in the Coma cluster of galaxies Supernovae in the Coma cluster of galaxies

Jan 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978aj.....83...13b&link_type=abstract

Astronomical Journal, vol. 83, Jan. 1978, p. 13-19.

Astronomy and Astrophysics

Astronomy

25

Astronomical Photometry, Galactic Clusters, Light Curve, Supernovae, Galactic Structure, Spatial Distribution, Stellar Magnitude

Scientific paper

All the supernovae so far discovered in the Coma cluster have been identified, and their light curves reanalyzed. Unpublished observations are reported for SN 1963c, SN 1963m, and SN 1962i, which is found to belong to a background galaxy. For type I supernovae, comparison with the average light curve provided a mean magnitude at maximum of 15.5 plus or minus 0.2, corresponding to an absolute magnitude of -18.7 if a distance modulus of 34.2 for the cluster is used. The location of the parent galaxies within the cluster may appear peculiar if compared with the distribution of the cluster members. A reliable sample of cluster members has been isolated, and an observed rate of supernova production of one SN per average galaxy per 600 yr has been found. The rate per unit luminosity (10 billion suns) appears significantly lower than that previously derived for E and S0 galaxies.

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