Seismic modelling of the rotating, slowly pulsating B-type star HD 21071

TL;DR

This paper demonstrates that incorporating rotational effects into seismic models is essential for accurately interpreting the oscillation spectra of the B-type star HD 21071, highlighting the importance of rotation in stellar pulsation analysis.

Contribution

It introduces rotating seismic models for SPB stars considering various parameters, showing the necessity of accounting for rotation in seismic interpretations.

Findings

Non-rotating models fail to explain observed frequencies.

Rotational models successfully fit the oscillation spectrum.

Proper mode identification and rotation effects are crucial for seismic modelling.

Abstract

Interpretation of the oscillation spectrum of the slowly pulsating B-type star HD21071 is presented. We show that non-rotating models cannot account for the two highest amplitude frequencies and taking into account the effects of rotation is necessary. Rotating seismic models are constructed using various chemical compositions, opacity data, core overshooting parameters and rotational velocities. There are prospects for seismic modelling of SPB stars, even if no asymptotic pattern is observed in their oscillation spectra, provided an unambiguous mode identification is doable and the effects of rotation are properly included.