Synchronous <Emphasis Type="Italic">UBVR</Emphasis> photometry and spectroscopy of DI Cephei |
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| Authors: | N Z Ismailov K N Grankin |
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| Institution: | (1) Shemakha Astrophysical Observatory, National Academy of Sciences of Azerbaijan, Shemakha, 373243, Azerbaijan;(2) Ulugh Beg Astronomical Institute, Academy of Sciences of Uzbekistan, Astronomicheskaya ul. 33, Tashkent, 700052, Uzbekistan |
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| Abstract: | We present our synchronous spectroscopy and photometry of DI Cep, a classical T Tauri star. The equivalent widths and radial velocities of the individual components and Hα, Hβ, D1 and D2 Na I, and HeI λ5876 Å emission line profiles exhibit variability. We have found a clear positive correlation between the brightness and equivalent width for the Hα and Hβ emission lines. The photometric and spectroscopic data are satisfactorily described in phases of a 9-day period. The expected magnetic field of the star has been estimated using existing magnetospheric models to be 655–1000 G. The star is suspected to be a binary. |
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| Keywords: | stars— variable and peculiar pre-main-sequence stars individual stars:— DI Cep photometry and spectroscopy |
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