Astronomy and Astrophysics – Astrophysics
Scientific paper
Apr 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992apj...389l..17g&link_type=abstract
Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 389, April 10, 1992, p. L17-L20.
Astronomy and Astrophysics
Astrophysics
22
Light Curve, Stellar Luminosity, Stellar Magnitude, Supernovae, H Ii Regions, Interstellar Extinction, Solar Neighborhood
Scientific paper
A method for deriving SNe luminosity functions is presented and used to derive the luminosity distribution of type II SNe with 'linear' light curves (SN II-Ls). The luminosity function can be represented by a Gaussian centered on M(B) = -16.45 (for H0 = 75 km/s/Mpc) with a 1 sigma dispersion of only +/-0.3 mag and a few higher luminosity SNe. The scatter about the mean is consistent with the uncertainties in the apparent B-magnitude at maximum and in the distances to the host galaxies. This suggests that there is little or no intrinsic scatter in the absolute B-magnitude at maximum an therefore that the majority of SN II-Ls are very good standard bombs. There is a definite complete lack of low-luminosity SN II-Ls. This and the small scatter about the mean imply that the reddening around SN II-Ls cannot be large. A weak correlation between absolute magnitude of the SNe and the inclination of the galaxy is consistent with a cosecant law such as could be used to describe extinction going in the solar neighborhood.
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