The close binary system SU Ind
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Tarih
2004
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
Photometric data on the southern mid-F type close eclipsing binary system SU Ind from the Carter Observatory (NZ) were examined, together with a light curve obtained from the Hipparcos Epoch Photometry (HEP) database. The system appears detached, although appreciably evolved from the Zero Age Main Sequence. The HEP period must be accurate for its own epoch, but it is significantly different from the reference (Hoffmeister 1956) value. This is difficult to explain, given the uncomplicated nature of the light curve. The apparent discrepancy can be reconciled with a period that has remained almost constant over the 40 year interval between the epochs by assuming some confusion between the almost equal depth minima. The near-equality of components raises issues of determinacy in light curve analysis, which are reviewed against the presentation of relevant numerical curve-fitting details. The system is of physical interest, in that it is close to the start of the 'active' range of spectral types. Its stars have relatively rapid rotation speeds and probably shallow convective sub-photospheric layers.
Açıklama
Anahtar Kelimeler
Stars: activity; Stars: close binaries; Stars: individual (SU Ind); Techniques: photometric light curve analysis
Kaynak
Astronomische Nachrichten
WoS Q Değeri
Scopus Q Değeri
Q3
Cilt
325
Sayı
5
