Massive pulsating stars observed by BRITE-Constellation - I. The triple system β Centauri (Agena)

@article{Pigulski2016MassivePS,
  title={Massive pulsating stars observed by BRITE-Constellation - I. The triple system $\beta$ Centauri (Agena)},
  author={Andrzej Pigulski and Henryk Cugier and Adam Popowicz and Rainer Kuschnig and Anthony F. J. Moffat and Slavek M. Rucinski and Alexander Schwarzenberg-Czerny and Werner W. Weiss and Gerald Handler and Gregg A. Wade and Otto Koudelka and Jaymie Matthews and Stefan Wladyslaw Mochnacki and P. Orlea'nski and Herbert Pablo and Tahina Ramiaramanantsoa and Gemma Whittaker and El.zbieta Zoclo'nska and Konstanze Zwintz},
  journal={Astronomy and Astrophysics},
  year={2016},
  volume={588}
}
This paper aims to precisely determine the masses and detect pulsation modes in the two massive components of Beta Cen with BRITE-Constellation photometry. In addition, seismic models for the components are considered and the effects of fast rotation are discussed. This is done to test the limitations of seismic modeling for this very difficult case. A simultaneous fit of visual and spectroscopic orbits is used to self-consistently derive the orbital parameters, and subsequently the masses, of… Expand
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References

SHOWING 1-10 OF 76 REFERENCES
Multisite spectroscopic seismic study of the β Cep star V2052 Ophiuchi: inhibition of mixing by its magnetic field
We used extensive ground-based multisite and archival spectroscopy to derive observational constraints for a seismic modelling of the magnetic β Cep star V2052 Ophiuchi. The line-profile variabilityExpand
Asteroseismology of the β Cephei star ν Eridani: interpretation and applications of the oscillation spectrum
The oscillation spectrum of v Eri is the richest known for any variable of the β Cephei type. We interpret the spectrum in terms of normal mode excitation and construct seismic models of the star.Expand
beta Centauri: An eccentric binary with two beta Cep-type components
We introduce our observational study of the orbital motion and the intrinsic variability of the double-lined spectroscopic binary β  Cen. Using 463 high signal-to-noise, high-resolution spectraExpand
Orbital parameters, masses and distance to β Centauri determined with the Sydney University Stellar Interferometer and high‐resolution spectroscopy
The bright southern binary star β Centauri (HR 5267) has been observed with the Sydney University Stellar Interferometer (SUSI) and spectroscopically with the European Southern Observatory CoudeExpand
XMM-Newton observations of β Centauri (B1 III): The temperature structure in the hot plasma and the photosphere-wind connection
We present XMM-Newton observations of the B giant β Centauri (Bl III). The spectra are rich of spectral lines from a wide range of ionization stages which indicate temperatures in the range ∼0.1-0.6Expand
Instability strips of slowly pulsating B stars and β Cephei stars: the effect of the updated OP opacities and of the metal mixture
The discovery of β Cephei stars in low-metallicity environments, as well as the difficulty in theoretically explaining the excitation of the pulsation modes observed in some β Cephei and hybridExpand
Asteroseismic observations of OB stars
Abstract The region of the hot end of the main-sequence is hosting pulsating stars of different types and flavours. Pulsations are not only observed for Slowly pulsating B stars (mid to late B-typeExpand
Rapid Rotation and Nonradial Pulsations: κ-Mechanism Excitation of g-Modes in B Stars
Several classes of stars (most notably O and B main-sequence stars, as well as accreting white dwarfs and neutron stars) rotate quite rapidly, at spin frequencies greater than the typical g-modeExpand
The hybrid B-type pulsator γ Pegasi: mode identification and complex seismic modelling
We present interpretation of the oscillation spectrum of the early B-type star $\gamma$ Pegasi, in which both low order p/g and high-order g-modes are observed. Using amplitudes and phases of theExpand
The opacity mechanism in B-type stars – II. Excitation of high-order g-modes in main-sequence stars
We show that the OPAL opacities, in addition to explaining the origin of the pulsations of β Cep stars, also predict the existence of a large region in the main-sequence band at lower luminosities,Expand
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