The nature of the light variation of the unique binary DK cVn
Küçük Resim Yok
Tarih
2012
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
We present BVR observations of DK CVn from 2007 and 2008. We analysed the BVR light curves of the system and obtained the system's parameters. Using the 'q-search' method, we measured the mass ratio of the system (q) as 0.55. Taking the temperature of the primary component as 4040K, the temperature of the secondary was found to be 3123K. Several flares were detected, and the distributions of flare equivalent duration versus flare total duration were modelled using the One-Phase Exponential Association Function for these flares. The parameters of the model demonstrated that the flares are the same as those detected from UV Ceti stars. We also demonstrate that the variation at out-of-eclipse must be caused by some cool spot(s) on one of the components. The star is found to show two active longitudes in which the spots are mainly formed. Consequently, this study reveals that DK CVn should be a chromospherically active binary star. © 2012 Astronomical Society of Australia.
Açıklama
Anahtar Kelimeler
binaries: close, spots, stars, stars: activity, stars: flare, stars: individual: DK CVn
Kaynak
Publications of the Astronomical Society of Australia
WoS Q Değeri
Scopus Q Değeri
Q1
Cilt
29
Sayı
1
