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Periodic Variations in the Brightness of the Red Dwarf V647 Her

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Photometric series for the red dwarf V647 Her (M3.5V) obtained from observations in 2019 at the Crimean Astrophysical Observatory and from data in the SuperWASP calalog in 2004-2007 are analyzed. Analysis of the examined light curves reveals the presence of a variability with an amplitude of 0m.04 and a period of 20.69 days. The stability of the characteristics of this variability in different epochs is studied. The amplitude of the variability and the phase of the minimum is preserved for an interval of 40-60 days. After deduction of the contribution of the 20-day periodicity, in the residuals of 2019 are suspected rapid changes with a period of 1.1 days with a probability of about 95%.

Based on the data from the SuperWASP catalog, along with changes in the brightness with this period optical flare events are also observed.

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Authors and Affiliations

  1. Crimean Astrophysical Observatory, Russian Academy of Sciences, Bakhchysarai, Russia

    N. I. Bondar, K. A. Antonyuk & N. V. Pit

  2. Special Astrophysical Observatory, Russian Academy of Sciences, Karachay-Cherkessia, Russia

    K. A. Antonyuk

Authors
  1. N. I. Bondar
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  2. K. A. Antonyuk
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  3. N. V. Pit
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Correspondence to N. I. Bondar.

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Translated from Astrofizika, Vol. 65, No. 4, pp. 503-514, November 2022.

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Bondar, N.I., Antonyuk, K.A. & Pit, N.V. Periodic Variations in the Brightness of the Red Dwarf V647 Her. Astrophysics 65, 483–493 (2022). https://doi.org/10.1007/s10511-023-09757-3

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  • DOI: https://doi.org/10.1007/s10511-023-09757-3

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