1998A&A...331..639P


Query : 1998A&A...331..639P

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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Number of rows : 7
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 V* TU Hor SB* 03 30 36.9540026808 -47 22 30.449151624   6.077 5.968     A1V 60 0
2 V* TV Pic El* 04 48 57.4656890952 -47 08 04.262473032   7.58 7.44     A2V 16 0
3 HD 31640 * 04 54 33.4487279664 -52 31 25.139203500   8.29 8.06     A3/5mA5-A7 14 0
4 HD 31587 V* 04 54 46.0680767352 -46 22 01.596490644   9.80 9.41     F2V 24 0
5 NGC 2244 OpC 06 32 11 +04 54.8           ~ 587 1
6 * psi Sco * 16 11 59.9931241272 -10 03 50.910154632   5.029 4.928     A1V 87 0
7 * omi Peg * 22 41 45.4041684504 +29 18 27.631023336 4.77 4.78 4.79 4.75 4.77 A1IV 275 0

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2022.06.25-13:49:42

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