Luminosity calibration for OB stars from Hipparcos trigonometric parallaxes

Hipparcos trigonometric parallaxes and observational data for open clusters are used to determine the absolute magnitudes MV of O and B stars of various spectral subtypes and luminosity classes, including those with broadened lines and hydrogen emission lines. The same data are used to derive a rela...

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Bibliographic Details
Published in:Astronomy reports 2001-09, Vol.45 (9), p.711-717
Main Authors: Loktin, A V, Beshenov, G V
Format: Article
Language:English
Subjects:
B stars
Emission lines
Hydrogen
Luminosity
Massive stars
Open clusters
Parallax
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Summary:Hipparcos trigonometric parallaxes and observational data for open clusters are used to determine the absolute magnitudes MV of O and B stars of various spectral subtypes and luminosity classes, including those with broadened lines and hydrogen emission lines. The same data are used to derive a relation between MV and the index β of the Strömgren photometric system. The resulting calibrations and the spectroscopic-parallax method are used to determine the distances to young open clusters.
ISSN:1063-7729
1562-6881
DOI:10.1134/1.1398920