Large-scale photometric activity of UX Ori type stars |
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| Authors: | V P Grinin O Yu Barsunova S Yu Shugarov P Kroll S G Sergeev |
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| Institution: | (1) Main Astronomical Observatory, Russian Academy of Sciences (Pulkovo), St. Petersburg, Russia;(2) Crimean Astrophysical Observatory, Nauchnyi, Crimea, Ukraine;(3) P. K. Shternberg State Astronomical Institute, Moscow State University, Moscow, Russia;(4) Astronomical Institute of the Slovak Academy of Sciences, Tatranska Lomnica, Slovakia;(5) Sonnenberg Astronomical Observatory, Sonnenberg, Germany |
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| Abstract: | Radical readjustments in the photometric activity of young stars owing to sudden changes in the circumstellar extinction are
discussed using the light curves of two UX Ori type stars, CQ Tau and V1184 Tau, as examples. Changes of this sort can be
caused by large deviations from axial symmetry in the distribution of circumstellar dust, as well as by large variations in
the mass accretion rate in circumstellar disks. A large amount of dust may also appear in the vicinity of a young star owing
to collisions of planetesimals.
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Translated from Astrofizika, Vol. 51, No. 1, pp. 5–13 (February 2008). |
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| Keywords: | stars activity — individual UX Ori type |
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