An asteroseismic study of the Beta Cephei star Theta Ophiuchi: photometric results

Abstract

We have carried out a three-site photometric campaign for the Beta Cephei star Theta Ophiuchi from April to August 2003. 245 hours of differential photoelectric uvy photometry were obtained during 77 clear nights. The frequency analysis of our measurements resulted in the detection of seven pulsation modes within a narrow frequency interval between 7.116 and 7.973 c/d. No combination or harmonic frequencies were found. We performed a mode identification of the individual pulsations from our colour photometry that shows the presence of one radial mode, one rotationally split l=1 triplet and possibly three components of a rotationally split l=2 quintuplet. We discuss the implications of our findings and point out the similarity of the pulsation spectrum of Theta Ophiuchi to that of another Beta Cephei star, V836 Cen.

arXiv comment8 pages, 6 figures

References in corpus (8)

• Catalog of Galactic Beta Cephei Stars
• Asteroseismology of the Beta Cephei star Nu Eridani: Interpretation and applications of the oscillation spectrum
• The mass ratio distribution of B-type visual binaries in the Sco OB2 association
• Photometric amplitudes and phases of nonradial oscillation in rotating stars
• Asteroseismology of the Beta Cephei star Nu Eridani: photometric observations and pulsational frequency analysis
• Constraints on stellar convection from multi-colour photometry of Delta Scuti stars
• Metallicities of the beta Cephei stars from low-resolution ultraviolet spectra
• Asteroseismological studies of three Beta Cephei stars: IL Vel, V433 Car and KZ Mus

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