Journal Article

Complex asteroseismology of the <i>β</i> Cep/slowly pulsating B-type pulsator <i>ν</i> Eridani: constraints on opacities

J. Daszyńska-Daszkiewicz and P. Walczak

in Monthly Notices of the Royal Astronomical Society

Published on behalf of The Royal Astronomical Society

Volume 403, issue 1, pages 496-504
Published in print March 2010 | ISSN: 0035-8711
Published online March 2010 | e-ISSN: 1365-2966 | DOI:
Complex asteroseismology of the β Cep/slowly pulsating B-type pulsator ν Eridani: constraints on opacities

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We undertake another attempt towards the seismic modelling of the most intensively studied main-sequence early B spectral type pulsator, ν Eridani. Our analysis is extended by a requirement of fitting not only pulsational frequencies but also the complex amplitude of the bolometric flux variation, f, related to each mode frequency. This approach, termed complex asteroseismology, provides a unique test of stellar parameters, atmospheres and opacities. In particular, the concordance of the empirical and theoretical values of f we obtained for the high-order g mode offers a new insight into seismic studies of main-sequence hybrid pulsators. The most intriguing and challenging result is that, whereas an agreement of the theoretical and empirical values of f for the radial mode can be achieved only with the OPAL data, a preference for the OP tables is obtained from the analysis of the high-order gravity mode.

Keywords: atomic data; stars: early-type; stars: individual: ν Eri; stars: oscillations

Journal Article.  6191 words.  Illustrated.

Subjects: Astronomy and Astrophysics

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