Basic physical properties of the close binary V497 Cep in the open cluster NGC 7160

Küçük Resim Yok

Tarih

2003

Dergi Başlığı

Dergi ISSN

Cilt Başlığı

Yayıncı

EDP Sciences

Erişim Hakkı

info:eu-repo/semantics/openAccess

Özet

New light and radial-velocity curves of V497 Cep, a binary in the open cluster NGC 7160, were obtained and the linear ephemeris of the system was refined to HJD (MinI) = (2446299.1596±0.0064) + (1d.2028287 ± 0d.0000015) × E. The first light and radia-velocity curve solutions allowed us to derive the basic physical properties of this astrophysically important binary. It was found that the observed light variation of V497 Cep consists of a strong ellipticity effect and a small contribution from grazing eclipses. A comparison of masses and radii of V497 Cep with theoretical evolutionary tracks indicates that both binary components are very close to the zero-age main sequence. A comparison of disentangled line profiles of the He I 6678 line with synthetic, rotationally broadened line profiles indicates that the rotation of both stars is synchronized with the orbital revolution as expected. This finding increases the credibility of our solutions. We find E(B - V) = 0.m39. The distance to the cluster NGC 7160 was found to be about 760 (±100) pc which agrees will with other available estimates.

Açıklama

Anahtar Kelimeler

Galaxy: Open clusters and associations: Individual: NGC 7160, Stars: Binaries: Eclipsing, Stars: Binaries: Spectroscopic, Stars: Individual: V497 Cep

Kaynak

Astronomy and Astrophysics

WoS Q Değeri

Scopus Q Değeri

Q1

Cilt

405

Sayı

3

Künye