Astronomy and Astrophysics – Astronomy
Scientific paper
Feb 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992mnras.254..404b&link_type=abstract
Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 254, Feb. 1, 1992, p. 403-412.
Astronomy and Astrophysics
Astronomy
48
Astronomical Photometry, O Stars, Sky Surveys (Astronomy), Stellar Oscillations, B Stars, Dwarf Stars, Eclipsing Binary Stars, Supergiant Stars, Variable Stars
Scientific paper
A photometric survey of 16 bright O-type stars was conducted in order to determine the incidence of low-order nonradial pulsation or other variability among them. For each star, several observations were obtained per night so that periodicities as short as one hour can be detected. The results show that microvariability with a time-scale of the order of days is present in all the O supergiants and in some dwarfs. Except for Zeta Oph, no periodicity characteristic of nonradial pulsation could be found in any of the stars. However, high-order modes would not have been detected. One O-type star is a previously unknown eclipsing binary. In the process of this study, two new B-type eclipsing binaries were discovered.
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