Astronomy and Astrophysics – Astrophysics
Scientific paper
Jul 1979
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979a%26a....76..188s&link_type=abstract
Astronomy and Astrophysics, vol. 76, no. 2, July 1979, p. 188-191. Research supported by the Swiss National Science Foundation
Astronomy and Astrophysics
Astrophysics
44
Spatial Distribution, Statistical Distributions, Supernovae, Distance, Frequency Distribution, Galactic Nuclei, Histograms, Radial Velocity, Red Shift, Statistical Analysis
Scientific paper
A sample of 228 supernovae that occurred in galaxies with known redshifts is used to show that the mean projected linear supernova distance from the center of the parent galaxy increases with increasing redshift. This effect is interpreted as an observational bias: the discovery rate of supernovae is reduced in the inner parts of distant, poorly resolved galaxies. Even under the optimistic assumption that no selection effects work in galaxies closer than 33 Mpc, about 50% of all supernovae are lost in the inner regions of galaxies beyond 150 Mpc. This observational bias must be taken into account in the derivation of statistical properties of supernovae.
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