2001A&A...374..638D


C.D.S. - SIMBAD4 rel 1.7 - 2019.11.21CET16:00:09

2001A&A...374..638D - Astronomy and Astrophysics, volume 374, 638-645 (2001/8-1)

A photometric study of the massive binary RY Sct.

DJURASEVIC G., ZAKIROV M., ESHANKULOVA M. and ERKAPIC S.

Abstract (from CDS):

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 (Djurasevic, 1992Ap&SS.196..241D) by applying the inverse-problem method (Djurasevic, 1992Ap&SS.197...17D) based on Marquardt's (1963,J. Soc. Ind. Appl. Math. 11(2), 431) algorithm. The analysis shows that RY Sct system is in an overcontact configuration (fover∼33%) with q=m2/m1=3.3 and i∼84.3°, 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.

Abstract Copyright:

Journal keyword(s): stars: binaries: eclipsing, close - stars: early-type - stars: individual: RY Sct

VizieR on-line data: <Available at CDS (J/A+A/374/638): observ.dat>

Simbad objects: 3

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Number of rows : 3

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 M 16 OpC 18 18 48 -13 48.4   6.58 6.0     ~ 919 2
2 Ass Ser OB 1 As* 18 21 -14.4           ~ 69 0
3 V* RY Sct bL* 18 25 31.6335 -12 41 27.846 10.25 10.38 9.12 9.46   O9.7Ibep 283 2

    Equat.    Gal    SGal    Ecl

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2019.11.21-16:00:09

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