Astronomy and Astrophysics – Astronomy
Scientific paper
Oct 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982pazh....8..546v&link_type=abstract
(Pis'ma v Astronomicheskii Zhurnal, vol. 8, Sept. 1982, p. 546-553) Soviet Astronomy Letters (ISSN 0360-0327), vol. 8, Sept.-Oct
Astronomy and Astrophysics
Astronomy
2
Stellar Evolution, Stellar Mass, Stellar Spectra, Astronomical Catalogs, Main Sequence Stars, Star Formation Rate, Supernovae
Scientific paper
Empirical mass spectra for solar-neighborhood stars are obtained from data for 17,000 stars in eight different star catalogs. It is found that the star-formation rate has been gradually diminishing with time, while a power law with an exponent of about -2.3 fits the initial mass function for stars from 1-75 solar masses. When mass spectra are constructed from independent samples of stars, with the mass obtained by different methods, the spectrum is found to show a deficiency of stars in the 1.5-2.5 solar masses interval and possibly also in the 5-6 solar masses interval. It is concluded that these results of mass spectra indicate a type II supernova rate consistent with previous estimates.
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