Type IA supernovae in late type galaxies - Reddening correction, scale height, and absolute maximum magnitude

Details Type IA supernovae in late type galaxies - Reddening correction, scale height, and absolute maximum magnitude Type IA supernovae in late type galaxies - Reddening correction, scale height, and absolute maximum magnitude

Aug 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992aj....104..696d&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 104, no. 2, Aug. 1992, p. 696-703.

Statistics

Computation

57

Elliptical Galaxies, Galactic Evolution, Interstellar Extinction, Stellar Magnitude, Supernovae, Computational Astrophysics, Milky Way Galaxy

Scientific paper

The color excess data for the best photometrically studied type Ia supernova (SNIa) which occurred in late-type galaxies are analyzed. These data are used to derive a ratio of the B band to selective extinction in the parent galaxies of 3.35 +/-0.25 (1 sigma), which indicates that the extinction curves in late-type galaxies have similar properties to that of the Milky Way. A new calibration for the absolute magnitude at maximum of SNIa in late-type galaxies is obtained; it is marginally brighter than the recent determinations for type Ia supernovae observed in elliptical (dust-free) galaxies, and confirms the potential of SNIa as standard candles for distance determinations. It is inferred that SNIa have a considerably broader distribution than the dust disk, and it is confirmed that they are older than old disk population objects, i.e., age greater than 1-2 billion yr. It is concluded that the total extinction thickness of late-type galaxies is very similar to that of the Milky Way.

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