SIMBAD references

1998A&A...331..639P - Astronomy and Astrophysics, volume 331, 639-650 (1998/3-2)

The nearby ellipsoidal variable TV Pictoris.

PAVLOVSKI K., CUYPERS J., DAVID M., GRIFFIN R.E.M., HENSBERGE H., ILIJIC S., SCHNEIDER H. and VERSCHUEREN W.

Abstract (from CDS):

TV Pic is identified as a bright, near-contact mid-A+early-F binary seen under a moderate inclination of 54°. From the analyses reported in this paper, it appears that both components are undermassive (1.2+0.4M), and that the secondary rotates not synchronously but more than twice as fast. These conclusions follow from the analysis of (1) high-dispersion spectra near both quadrature phases, to which the secondary contributes roughly 10% in the visual light, and (2) light-curves in the Stroemgren and Walraven system covering the interval 3200-5600Å and a time span of more than 2600 rotational periods. The light-curves show a very pronounced O'Connell effect, and only marginal colour variations. Models assuming a temperature spot either on the primary or the secondary explain the major part of the asymmetry in the light-curves, and are intended to provide useful initial estimates for more advanced mathematical codes. However, a more realistic physical model will require more discriminatory data, including spectroscopic observations in other spectral windows, and spectroscopy over the whole orbital cycle.

Abstract Copyright:

Journal keyword(s): stars: binaries: close - spectroscopic - stars: individual: HD 30861 (TV Pic) - stars: variables: other - stars: fundamental parameters - stars: rotation

Simbad objects: 7

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