Asteroseismology of the β Cephei star ν Eridani: massive exploration of standard and non-standard stellar models to fit the oscillation data

@article{Ausseloos2004AsteroseismologyOT,
  title={Asteroseismology of the $\beta$ Cephei star $\nu$ Eridani: massive exploration of standard and non-standard stellar models to fit the oscillation data},
  author={M. Ausseloos and Richard Scuflaire and Anne Thoul and Conny Aerts},
  journal={Monthly Notices of the Royal Astronomical Society},
  year={2004},
  volume={355},
  pages={352-358}
}
We present the results of a detailed seismic modelling of the Cephei star Eridani with the Li‘ ege evolution and pulsation codes. We selected four clearly detected, well-identified and independent pulsation modes from the frequency spectrum obtained from a recent five-month multisite, multitechnique campaign, while previous modelling work only took into account three frequencies. We show by means of a massive exploration of the parameter space that no standard stellar model both matches and… 

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References

SHOWING 1-10 OF 20 REFERENCES

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.

Seismic modelling of the $\beta\,$Cep star EN (16) Lacertae

We perform seismic modelling of the massive β Cep star EN Lacertae. The starting point of our analysis is the spectroscopic mode identification recently performed. To this, we add a new updated

The Potential of Asteroseismology for Hot, Subdwarf B Stars: A New Class of Pulsating Stars?

We present key sample results of a systematic survey of the pulsation properties of models of hot B subdwarfs. We use equilibrium structures taken from detailed evolutionary sequences of solar

A Driving Mechanism for the Newly Discovered Class of Pulsating Subdwarf B Stars

We present new calculations that strongly reinforce the idea—originally proposed by Charpinet et al.—that pulsation modes are driven through an opacity bump due to a local enhancement of the iron

A Driving Mechanism for the Newly Discovered Long-Period Pulsating Subdwarf B Stars

We present the results of a stability survey carried out for a sequence of representative models of subdwarf B stars spanning the range of effective temperature 22,000 K ≤ Teff ≤ 38,000 K. We show

β Cep stars from a spectroscopic point of view

In this review we present the current status of line-profile-variation studies of β Cep stars. Such studies have been performed for 26 bright members of this class of pulsating stars in the past 25

The opacity mechanism in B-type stars – I. Unstable modes in β Cephei star models

An improved version of the OPAL opacities, with the metal abundance parameter Z having values of 0.02 and 0.03, has been used in a stability survey for models of 7- to 16-M ○ . stars in the

On non-radial oscillations of B-type stars.

The excitation mechanisms behind the slow pulsations―with periods of the order of one day―of OB stars are discussed on the basis of numerical computations. Non-radial, non-adiabatic stability

Eclipsing Binaries as Astrophysical Laboratories: Internal Structure, Core Convection, and Evolution of the B-Star Components of V380 Cygni

New photometric solutions have been carried out on the important eccentric eclipsing system V380 Cygni (B1.5 II-III + B2 V) from UBV differential photoelectric photometry obtained by us. The

Asteroseismology of HD 129929: Core Overshooting and Nonrigid Rotation

TLDR
High-quality multicolor Geneva photometric data taken over 21 years of the B3Vstar HD 129929 detect six frequencies, among which appear the effects of rotational splitting with a spacing of ∼0.0121 cycles per day, which implies that the star rotates very slowly.