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Date and Time of the Query: 2019-04-19 T11:24:48 PDT
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For refcode 1992ApJ...384L...9M:
Retrieve 40 NED objects in this reference.
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Copyright by American Astronomical Society. Reproduced by permission
1992ApJ...384L...9M HIGH RATE FOR TYPE Ic SUPERNOVAE RICHARD A. MULLER, HEIDI JO MARVIN NEWBERG, CARLTON R. PENNYPACKER, SAUL PERLMUTTER, TIMOTHY P. SASSEEN, AND CRAIG K. SMITH Lawrence Berkeley Laboratory and Space Sciences Laboratory, University of California, Berkeley, CA 94720 Received 1991 September 3; accepted 1991 October 18 ABSTRACT Using an automated telescope we have detected 20 supernovae in carefully documented observations of nearby galaxies. The supernova rates for late spiral (Sbc, Sc, Scd, and Sd) galaxies, normalized to a blue luminosity of 10^10^L_B_sun_ are 0.4, 1.6, and 1.1 h^2^ per 100 years for Types Ia, Ic, and II supernovae. The rate for Type Ic supernovae 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 supernovae 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 Galactic supernovae 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. Subject headings: galaxies: stellar content - stars: statistics - supernovae: general - telescopes
Retrieve 40 NED objects in this reference.
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