Spectroscopic calibration of the magnitudes of B-stars of the Galactic disk

Details Spectroscopic calibration of the magnitudes of B-stars of the Galactic disk Spectroscopic calibration of the magnitudes of B-stars of the Galactic disk

May 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990pazh...16..435k&link_type=abstract

Pis'ma v Astronomicheskii Zhurnal (ISSN 0320-0108), vol. 16, May 1990, p. 435-443. In Russian. In Russian. In Russian.

Astronomy and Astrophysics

Astronomy

B Stars, Calibrating, Milky Way Galaxy, Stellar Magnitude, Stellar Spectra, A Stars, Astronomical Catalogs, Line Spectra

Scientific paper

The present work is based on a catalog of the equivalent widths of hydrogen and neutral helium lines in the spectra of 500 B-stars. The calibration relationship of absolute magnitude versus equivalent widths is derived from spectral observations of B and A stars in open clusters. The zero point of this dependence is determined from the trigonometric parallaxes of the nearest A and B stars. By comparing values of W(H-gamma) and the beta-indices of the Stromgren system, an M(V)(beta) calibration is obtained which differs substantially from the Crawford calibration.

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