Issue |
A&A
Volume 374, Number 2, August I 2001
|
|
---|---|---|
Page(s) | 638 - 645 | |
Section | Interstellar and circumstellar matter | |
DOI | https://doi.org/10.1051/0004-6361:20010727 | |
Published online | 15 August 2001 |
A photometric study of the massive binary RY Sct *
1
Astronomical Observatory, Volgina 7, 11050 Belgrade, Yugoslavia
2
Astronomical Institute of Uzbek Academy of Sciences, Astronomicheskaya 33, 700052 Tashkent, Uzbekistan and Isaac Newton Institute of Chili, Uzbek branch
3
Astronomical Institute of Uzbek Academy of Sciences, Astronomicheskaya 33, 700052 Tashkent, Uzbekistan
Corresponding author: G. Djurasević, gdjurasevic@aob.bg.ac.yu
Received:
14
April
2000
Accepted:
17
May
2001
The present study deals with the problem of the estimation of the
orbital and physical parameters for the EB-type eclipsing binary RY Sct,
based on the interpretation of new photometric U B V R observations.
The light curves obtained at the Maidanak Observatory during 1979-94
show a slight asymmetry around the secondary minima and a small difference
in the height of the successive maxima.
The light curves are analysed in the framework of the Roche computer model
(Djurašević [CITE]) by applying the inverse-problem method
(Djurašević [CITE]) based on Marquardt's
([CITE]) algorithm. The analysis shows that RY Sct system is
in an overcontact configuration with
and
, generating total-annular eclipses. The basic parameters of the system and of the active region are estimated
for all individual U, B, V and R light curves.
Our results suggested a mass exchange between the components and
mass loss through the outer Lagrangian point L3. This could be taken
as a possible mechanism in the formation of the
circumstellar envelope of toroidal form lying in the orbital plane of
the system.
Key words: stars: binaries: eclipsing, close / stars: early-type / stars: individual: RY Sct
© ESO, 2001
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