Abstract
Hipparcos trigonometric parallaxes and observational data for open clusters are used to determine the absolute magnitudes M V 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 M V 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.
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Translated from Astronomicheski\(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l} \) Zhurnal, Vol. 78, No. 9, 2001, pp. 819–826.
Original Russian Text Copyright © 2001 by Loktin, Beshenov.
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Loktin, A.V., Beshenov, G.V. Luminosity calibration for OB stars from Hipparcos trigonometric parallaxes. Astron. Rep. 45, 711–717 (2001). https://doi.org/10.1134/1.1398920
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DOI: https://doi.org/10.1134/1.1398920