High rate for Type IC supernovae

Details High rate for Type IC supernovae High rate for Type IC supernovae

Jan 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992apj...384l...9m&link_type=abstract

Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 384, Jan. 1, 1992, p. L9-L13.

Astronomy and Astrophysics

Astronomy

53

Milky Way Galaxy, Sky Surveys (Astronomy), Star Distribution, Supernovae, Reflecting Telescopes, Stellar Luminosity

Scientific paper

Using an automated telescope, 20 SNe in carefully documented observations of nearby galaxies were detected. The SN rates for late spiral (Sbc, Sc, Scd, and Sd) galaxies, normalized to a blue luminosity of 10 exp 10 are 0.4, 1.6, and 1.1 h squared per 100 years for Types Ia, Ic, and II SNe. The rate for Type Ic SNe is significantly higher than found in previous surveys. The rates are not corrected for detection inefficiencies and do not take into account the indications that the Ic SNe are fainter on the average than the previous estimates; therefore the true rates are probably higher. The rates are not strongly dependent on the galaxy inclination, in contradiction to previous compilations. If the Milky Way is a late spiral, then the rate of the Galactic SNe is greater than 1 per 30 +/-7 yr, assuming h = 0.75. This high rate has encouraging consequences for future neutrino and gravitational wave observatories.

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