Hydrogen-Line Absorption in Early-Type Stars Virtual Observatory Resource

Authors

1. Bappu M.K.V.
2. Chandra S.
3. Sanwal N.B.
4. Sinvhal S.D.

Published by

CDS

Abstract

Photoelectric determinations of H-{gamma} absorption line intensity have been made of stars in selected clusters and associations as well as in the general galactic field. Interference filters having a width at half intensity of 45{AA} were used to isolate spectral regions centered on 4280{AA}, H-{gamma} and 4410{AA}. The {Gamma} indices derived, which represent a measure of H-{gamma} absorption, can be used in conjunction with unreddened values of either (U-B) or (B-V) for spectral and luminosity class determinations of stars in the spectral range O6 to A0.

Keywords

1. visible-astronomy
2. narrow-band-photometry
3. early-type-stars

Bibliographic source Bibcode

1962MNRAS.123..521B

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