Early-type W UMa contact binary system: New data on V535 Ara
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Tarih
2012
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Elsevier Science Bv
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
This paper presents the results of spectroscopic and photometric observations of the early-type W UMa system V535 Ara. New high-resolution spectra were taken at the Mt. John University Observatory in 2007. Radial velocities and spectroscopic orbital elements of the system were determined by applying KOREL spectral disentangling. The resulting orbital elements were: a(1)sini = 0.0047 +/- 0.0001 AU, a(2)sini = 0.0146 +/- 0.0001 AU, M(1)sin(3)i = 1.85 +/- 0.01 M(circle dot), and M(2)sin(3)i = 0.59 +/- 0.01 M(circle dot). The components were found to be in synchronous rotation following examination of their disentangled H gamma line profiles. Four photometric data-sets (1966 BV, 1967 BV, HIPPARCOS and ASAS) were modeled using the Wilson-Devinney method. The model describes V535 Ara as an A sub-type W UMa type eclipsing binary which has a fill out factor of 0.22 in marginal contact configuration. The simultaneous solution of light and radial velocity curves gave the following absolute parameters: M(1) = 1.94 +/- 0.04 M(circle dot), M(2) = 0.59 +/- 0.02 M(circle dot), R(1) = 2.09 +/- 0.03 R(circle dot), R(2) = 1.23 +/- 0.02R(circle dot), L(1) = 18 +/- 3 L(circle dot), and L(2) = 6 +/- 1 L(circle dot). The distance to V535 Ara was calculated as 123 20 pc using distance modulus with correction for interstellar extinction. (C) 2011 Elsevier B.V. All rights reserved.
Açıklama
Anahtar Kelimeler
Stars: binaries: eclipsing, Stars: fundamental parameters, Technique: spectroscopy, Technique: photometry, Stars: individual (V535 Ara)
Kaynak
New Astronomy
WoS Q Değeri
Q2
Scopus Q Değeri
Q2
Cilt
17
Sayı
2
