Optical variability of the B-type star HD 105382: Pulsation or rotation?

Details Optical variability of the B-type star HD 105382: Pulsation or rotation? Optical variability of the B-type star HD 105382: Pulsation or rotation?

Jan 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001a%26a...366..121b&link_type=abstract

Astronomy and Astrophysics, v.366, p.121-128 (2001)

Astronomy and Astrophysics

Astrophysics

10

Stars: Early-Type, Stars: Variables: General, Stars: Oscillations, Stars: Individual: Hd 105382

Scientific paper

We present ground-based multi-colour Geneva photometry and high-resolution high S/N spectra of the variable B-type star HD 105382. We provide evidence that this star is not a Be star, as indicated in the literature. The monoperiodic variability found in the Hipparcos data is confirmed in our ground-based follow-up observations. All existing data give rise to the detection of the period of 1.295 days. We try to interpret the variability of the star in terms of a non-radial g-mode pulsation model and of a rotational modulation model. None of these two is able to explain the observed line-profile variations in full detail. Based on observations obtained with the Swiss photometric telescope and ESO's CAT/CES telescope, both situated at La Silla, Chile.

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