| Issue |
Astron. Astrophys. Suppl. Ser.
Volume 132, Number 3, November I 1998
|
|
|---|---|---|
| Page(s) | 367 - 379 | |
| DOI | https://doi.org/10.1051/aas:1998301 | |
| Published online | 15 November 1998 | |
Physical parameters of the Algol system TZ Eridani from simultaneous analysis of Geneva 7-colour light curves *,**
1
Geneva Observatory, CH-1290 Sauverny, Switzerland
2
Institut d'Astronomie de l'Université de Lausanne, CH-1290 Chavannes-des-Bois, Switzerland
3
Astronomy Department, University of Illinois, 1002 W. Green St., Urbana, Illinois 61801, U.S.A.
Send offprint request to: F. Barblan
Received:
27
March
1998
Accepted:
11
May
1998
Light curves of the semi-detached eclipsing binary system TZ Eridani in the
Geneva 7-colour photometric system were analysed using the Wilson-Devinney
programme. The physical and orbital parameters have been determined through
a self-consistent simultaneous solution of the seven light curves and of the
radial velocity curves of both components. The following absolute elements
of the components are, for the primary (mass gainer), 
, 
0.03 
, 
, 
K, and for the secondary (mass
loser), 
, 
, 
, 
100 K. The semi-major axis A of the relative orbit is 
0.16
. The regular increase of the period is described. The spectral
type of the components are A5/6 V (primary) and K0/1 III. The secondary has
exhibited a long-term luminosity increase of about 0.06 in V between
Dec. 1983 and Dec. 1996. The distance to TZ Eri is evaluated to 270 ± 12
pc.
Key words: stars: individual: TZ Eridani / binaries: eclipsing / stars: fundamental parameters
© European Southern Observatory (ESO), 1998