Long-Term Photometric and Spectral Variations of DI Cephei

Details Long-Term Photometric and Spectral Variations of DI Cephei Long-Term Photometric and Spectral Variations of DI Cephei

Apr 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008pz.....28....5i&link_type=abstract

Peremennye Zvezdy, vol.28, no. 5.

Mathematics

Probability

Scientific paper

We have analyzed the photometric and spectral variations of the classical T Tauri star DI Cep for the last 50 years. Currently the star is at its faintest state and possesses an emission spectrum in the visual range. Synchronous spectroscopy and UBVR photometry show that the higher the brightness, the stronger were the intensities of hydrogen Halpha, Hbeta emission lines and of FeII, HeI 5876 A emissions. For the first time, we detected, with a high probability, quasi-periodic variations of the star's brightness and of its spectrum with the period P = 2020 +/- 200 days.

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