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Photometric variability of the young star DI Cep

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We analyse our new and our previously published optical photometric data on DI Cep, a classical T Tau star. We study the variability of optical brightness with different temporal and amplitude characteristics. On a long-term scale, DI Cep shows 14-19 year cycles of variations with a magnitude of amplitude from 0.1 to 0.5 in different cycles. We also found a period of 9.185 days in the variations in the U-V colour. Probably, this period is connected with the rotation of a hot spot on DI Cep.

Keywords: DI Cep; Optical variability; Stars pre-main sequence

Document Type: Research Article


Affiliations: 1: Sternberg Astronomical Institute Universitetskij prospetit 13 Moscow 119899 Russia 2: Crimean Astrophysical Observatory and Isaac Newton Institute of Chile Crimean Branch, p/o Nauchny Crimea 98409 Ukraine

Publication date: April 1, 2004

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