Beta Cephei stars in the ASAS-3 data. I. Long-term variations of periods and amplitudes

Abstract

We analysed V-filter ASAS-3 photometry of 41 known Beta Cephei-type stars. The ASAS-3 photometry was combined with the archival data, if available, to determine long-term stability of periods and amplitudes of excited modes. We detected amplitude changes in three Beta Cephei stars, BW Cru, V836 Cen, and V348 Nor. Period changes were found in KK Vel and V836 Cen. Our analysis shows that intrinsic period changes are more common among multiperiodic stars, apparently because they are caused by some kind of mode interaction. In addition, we found new modes for seven stars, and for ten others we provide new solutions or remove ambiguities in the detected frequencies. One candidate hybrid Beta Cephei/SPB star, HD133823, is discovered.

arXiv comment22 pages, 11 figures, accepted for publication in A&A

References in corpus (7)

• The VLT-FLAMES Survey of Massive Stars: Observations in the Galactic Clusters NGC 3293, NGC 4755 and NGC 6611
• Early type stars at high galactic latitudes I. Ten young massive B-type stars
• Automated classification of variable stars for ASAS 1-2 data
• Beta Cephei stars in the ASAS-3 data. II. 103 new Beta Cephei stars and a discussion of low-frequency modes
• Asteroseismological studies of three Beta Cephei stars: IL Vel, V433 Car and KZ Mus
• Spatially resolved STIS spectra of WR+OB binaries with colliding winds
• Multiperiodicity in the large-amplitude rapidly-rotating $\beta$Ceph ei star HD 203664

Cited by in corpus (14)

• Kepler observations of variability in B-type stars
• Evidence for nonlinear resonant mode coupling in the Beta Cep star HD 180642 (V1449 Aql) from CoRoT space-based photometry
• Blue large-amplitude pulsators as a new class of variable stars
• The period-luminosity relation for delta Scuti stars using Gaia DR2 parallaxes
• Beta Cephei stars in the ASAS-3 data. II. 103 new Beta Cephei stars and a discussion of low-frequency modes
• Revisiting bright delta Scuti stars and their period-luminosity relation with TESS and Gaia DR3
• De-Trending Time Series for Astronomical Variability Surveys
• The planet-hosting subdwarf B star V391 Pegasi is a hybrid pulsator
• Short timescale variables in the Gaia era: detection and characterization by structure function analysis
• Polarimetric detection of nonradial oscillation modes in the beta Cephei star beta Crucis
• Chaos in large-amplitude pulsators: application to the beta Cep star HD180642
• An Investigation of Four Chemically Peculiar Stars with Photometric Periods below 12 Hours
• Modelling Stochastic Signatures in Classical Pulsators
• Tidally excited oscillations in MACHO 80.7443.1718: Changing amplitudes and frequencies, high-frequency tidally excited mode, and a decrease in the orbital period