PHOTOMETRIC-OBSERVATIONS OF THE BINARY-SYSTEM V350-LACERTAE

DEMIRCAN O., DERMAN E., KAHRAMAN G.

ASTROPHYSICS AND SPACE SCIENCE, vol.188, no.1, pp.151-158, 1992 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 188 Issue: 1
  • Publication Date: 1992
  • Doi Number: 10.1007/bf00642932
  • Journal Name: ASTROPHYSICS AND SPACE SCIENCE
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.151-158
  • Ankara University Affiliated: No

Abstract

Differential UBV observations of the small amplitude (0.12 mag in V) single-lined active binary V350 Lac are presented. It was observed that the light minima occur in conjuction time. A shift of the light curve (0.05 in orbital phase) towards lower phases could be due to a small error in the light elements. The primary minimum is about 0.04 mag deeper than the secondary. It was shown that different depths of two light minima are not produced by the reflection effect but due primarily to gravity darkening on the tidally elongated and synchronously rotating visible component. An O'Connel effect observed as the brighter primary maximum could be an indication of starspot activity or gas streaming between the components.