On the light curve variation of the Be star EM Cep

Bakis H., Bakis V., Demircan O., Budding E., Tanriver M.

Workshop on Solar and Stellar Physics through Eclipses, Antalya, Türkiye, 27 - 29 Mart 2006, cilt.370, ss.225-226 identifier

  • Cilt numarası: 370
  • Basıldığı Şehir: Antalya
  • Basıldığı Ülke: Türkiye
  • Sayfa Sayıları: ss.225-226


We present new UBV photometric observations obtained in the last four observing seasons and one season of spectroscopic observation for the Be star EM Cep. A possible period of 0.403 days and large light amplitude variations from one season to other were determined from the new photometric observations. A flare activity for this star has been detected on 17-18 July 2003. The brightness increase during the flare was found to be maximum in U-band. New spectroscopic observations with high-resolution spectrograph did not present a certain result due to the limited number of data. The type of variability in the light curves shows that the star could be a lambda Eri-type variable. Additional changes on the light curve do not show any periodicity. Binarity problem of the star has been also discussed.