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UX Ori Variables in the Cluster IC 348

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Results are presented from many years of photometric (VRCIC) observations of three variable T Tauri type stars in the cluster IC 348: V712 Per, V719 Per, and V909 Per. All three stars have photometric activity characteristic of UX Ori stars. The activity of V719 Per has increased significantly over the last 10 years: the amplitude of its Algol-like minima has increased by roughly a factor of 4 and has reached three stellar magnitudes in the I band. Periodograms of the light curves do not confirm the periods found previously by other authors on the basis of shorter series of observations. The slope of the color tracks on “color-magnitude” diagrams is used to determine the reddening law for these stars owing to selective absorption by circumstellar dust. Modelling of these parameters by the Mie theory shows that the maximum size amax of the dust particles in the protoplanetary disks of these stars is 1.5-2 times greater than in the interstellar medium. In V712 Per and V909 Per, the bulk of the mass of the dust particles is concentrated near amax, while in V719 Per the average mass of the dust particles is determined by the minimum size of the particles. It should be emphasized that these conclusions rely on an analysis of the optical variability of these stars.

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Authors and Affiliations

  1. Main (Pulkovo) Astronomical Observatory, Russian Academy of Sciences, St. Petersburg, Russia

    O. Yu. Barsunova, V. P. Grinin & A. O. Semenov

  2. St. Petersburg State University, St. Petersburg, Russia

    V. P. Grinin & A. O. Semenov

  3. Crimean Astrophysical Observatory, Nauchnyi, Russia

    S. G. Sergeev

  4. P. K. Shternberg Institute of Astronomy, M. V. Lomonosov Moscow State University, Moscow, Russia

    S. Yu. Shugarov

  5. Institute of Astronomy, Slovak Academy of Sciences, Tatranska Lomnica, Slovakia

    S. Yu. Shugarov

Authors
  1. O. Yu. Barsunova
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  2. V. P. Grinin
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  3. S. G. Sergeev
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  4. A. O. Semenov
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  5. S. Yu. Shugarov
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Translated from Astrofizika, Vol. 58, No. 2, pp. 209-221 (May 2015).

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Barsunova, O.Y., Grinin, V.P., Sergeev, S.G. et al. UX Ori Variables in the Cluster IC 348. Astrophysics 58, 193–203 (2015). https://doi.org/10.1007/s10511-015-9375-8

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  • DOI: https://doi.org/10.1007/s10511-015-9375-8

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