Photometric variability of mid-B stars

Details Photometric variability of mid-B stars Photometric variability of mid-B stars

Nov 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985a%26a...152....6w&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 152, no. 1, Nov. 1985, p. 6-14. Research supported by the Ministerie van Onder

Astronomy and Astrophysics

Astrophysics

68

Astronomical Photometry, B Stars, Early Stars, Stellar Oscillations, Variable Stars, Accuracy, Binary Stars, Classifications, Light Curve, Standard Deviation

Scientific paper

An extended systematic study was carried out of photometric variations of B-type main sequence stars. The campaign was performed using the seven-color instrument at La Silla. The survey covered 30 stars and showed that the objects could be typified by the 53 Per variables. The observed variabilities may arise from pulsations in nonradial g-modes with high radial wavenumbers. The motions detected occur in the outer stellar layers, i.e., in the second He ionization zone, a situation with significance for classifications of variable OB stars and supergiants, as opposed to mid-B stars. Another 10 yr of observations would be required to derive the frequency spectra with an accuracy as high as that available for white dwarfs.

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