A photometric study of early-type stars

Details A photometric study of early-type stars A photometric study of early-type stars

Jan 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983pasp...95...48m&link_type=abstract

Astronomical Society of the Pacific, Publications, vol. 95, Jan. 1983, p. 48-57.

Astronomy and Astrophysics

Astronomy

8

Early Stars, Stellar Spectrophotometry, B Stars, O Stars, Spectral Line Width, Stellar Mass Ejection, Supergiant Stars, Variable Stars

Scientific paper

Observation data in the alpha(16), Lambda(9) photometric system are presented for 228 early-type O4-B8 stars of all luminosity classes. Also included are data for Be stars, B-type stars with a shell, and Beta Canis Majoris stars. The comparison with R-alpha and beta indices suggests that the alpha(16) photometry is of good quality. The photometry can be used in separating different kinds of stars; when combined with the 13-color photometry, it makes possible a finer classification. The alpha(16) index also provides an indication of stellar mass-loss rates, especially for supergiant stars. Preliminary He I (5876 A) measurements suggest that this line is well correlated with MK types. Be stars observed over several years also exhibit H-alpha line-strength variability. It is found that the Lambda(9) index separates supergiant stars later than B2.

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