Multiple Period Search for K, M and C Type Semiregular Variables in TUBITAK National Observatory
Küçük Resim Yok
Tarih
2008
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Tubitak Scientific & Technological Research Council Turkey
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
In this study, periods obtained from long-term multi-bands (Johnson V and R filters) photometric observations of some K, M and C spectral type semiregular (SR) variables obtained with the T40 telescope (40 cm) and SSP 5A photometer at TUBITAK National Observatory (TNO) between 1998 and 2005 were examined. We have found that some of these SR variables have multiple (long and short) periods as appearedm ostly from Hipparcos observations; three variables are, for the first time, observed to have a period. The light curves, the variation amplitude in R band and the maximum light Epoch(s) of SR variables were also given. Besides, some difficulties encountered in the long-term observations were also discussed briefly.
Açıklama
Anahtar Kelimeler
stars: variable stars: late-type stars: photometry, stars: period
Kaynak
Turkish Journal of Physics
WoS Q Değeri
N/A
Scopus Q Değeri
Q3
Cilt
32
Sayı
1
