On the absolute brightnesses and masses of early-type stars

Details On the absolute brightnesses and masses of early-type stars On the absolute brightnesses and masses of early-type stars

Feb 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995a%26a...294..509s&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 294, no. 2, p. 509-514

Astronomy and Astrophysics

Astrophysics

31

Brightness, Early Stars, Eclipsing Binary Stars, Stellar Mass, Stellar Models, Calibrating, Solar Neighborhood, Star Clusters, Stellar Evolution, Stellar Temperature

Scientific paper

A new empirical brightness calibration of early-type stars is presented, entirely based on accurate binary data. This calibration agrees remarkably well with the predictions of the most recent stellar models, but disagrees completely with all other currently used calibrations for early-type stars. The binaries used to derive the new calibration cover a range of masses from about 1.3 solar mass to 25 solar mass, corresponding to a temperature range from 6,700 K to 38,000 K. Over the whole mass range, no systematic differences between the observed and evolutionary masses were found. The application to the alpha Per cluster gives a distance modulus which agrees perfectly with that derived by comparing its lower main-seqeunce to stars with known parallaxes.

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