| Issue |
A&A
Volume 403, Number 2, May IV 2003
|
|
|---|---|---|
| Page(s) | 637 - 643 | |
| Section | Stellar structure and evolution | |
| DOI | https://doi.org/10.1051/0004-6361:20030388 | |
| Published online | 06 May 2003 | |
Photometric study of the over-contact binary star GSC 3822-1056 *,**
1
Konkoly Observatory of the Hungarian Academy of Sciences, PO Box 67, 1525 Budapest, Hungary
2
Baja Astronomical Observatory of Bács-Kiskun County, PO Box 766, 6500 Baja, Szegedi út, Hungary e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
;This email address is being protected from spambots. You need JavaScript enabled to view it.
3
Guest observer at the Instituto de Astrofisica de Canarias, Spain
Corresponding author: Sz. Csizmadia, This email address is being protected from spambots. You need JavaScript enabled to view it.
Received:
12
September
2002
Accepted:
7
March
2003
Abstract
Here we present the first Johnson-Cousins VRC light
curves of
the over-contact binary star GSC 3822-1056. A period
study and the light curve solution are also given. An
extremely
high rate of period increase (
)
was found. The origin of this period change can be: (i) partly
covered light-time effect due to the orbital motion around the
mass center of a possible third body; (ii) mass transfer between
the components.
The light curve was solved using the 1998 Wilson-Devinney Code. We
examined the light curve with and without third light. Both
solutions
yielded a contact configuration with high temperature difference
between the components. Despite the high degree of the contact
(
), the temperature difference between the components
K.
The high mass ratio of the system and its other unusual properties
suggest that GSC 3822-1056 may be a recently formed contact
binary.
Key words: techniques: photometric / stars: binaries: eclipsing / stars: binaries: close / stars: individual: GSC 3822-1056
Observations were made by the 80 cm “IAC80” telescope at Observatorio del Teide in Tenerife, Spain, operated by Instituto de Astrofisica de Canarias.
Tables 2a–c are only available in electronic form at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via http://cdsweb.u-strasbg.fr/cgi-bin/qcat?J/A+A/403/637
© ESO, 2003
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.