Investigation of flare activity of the red dwarf star EV Lac based on original observations and using the data from ground-based and space surveys

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A.A. Shlyapnikov
M.A. Gorbachev

Abstract

The problem of energetics of flare activity of dwarf stars in the lower main sequence of the Hertzsprung-Russell diagram is relevant in the context of the detection of powerful flares (superflares) and the possibility of assessing such phenomena on the Sun in the past and future. A brief historical review of the EV Lac original researches is presented, and the modern databases containing information on photometric observations of the star are described. The main attention is paid to the observations of EV Lac made by the TESS observatory. Results of the analysis of flare activity of the star according to the data of the TESS project are presented. The most typical flares have been demonstrated. The dependence of flare activity of EV Lac on the phase of its axial rotation has been studied. The dependence of the number of flares on the phase and energy is illustrated. The segment of the phase of the EV Lac light curve, which contains flares with the highest energies, is indicated.

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References

Abranin Eh.P., Alekseev I.Yu., Bazelyan L.L., et al. 1994. Kinematika i Fizika Nebesnykh Tel, vol. 10, no. 4, pp. 70–77.
Abranin E.P., Alekseev I.Yu., Avgoloupis S., 1998. Astron. Astrophys. Trans., vol. 17, p. 221.
Alekseev I.Yu., Gershberg R.E., Ilyin I.V., et al., 1994. In Jean-Pierre Caillault (Ed.), Cool Stars, Stellar Systems, and the Sun. Proceedings of the 8th Cambridge Workshop, San Francisco: ASP, vol. 64, p. 345.
Alekseev I.Yu., Chalenko N.N., Fomin V.P., et al., 1995. In Iucci N. and Lamanna E. (Eds), 24th International Cosmic Ray Conference. International Union of Pure and Applied Physics, Rome, Italy, vol. 2, p. 389.
Alekseev I.Y., Gershberg R.E. 1997a. Astron. Rep., vol. 41, pp. 207–214.
Alekseev I.Yu., Gershberg R.E., 1997b. In Asteriadis G., Bantelas A., Contadakis M.E., Katsambalos K., Papadimitriou A., Tziavos I.N. (Eds), The Earth and the Universe. Aristotle Univ. of the Thessaloniki, p. 33.
Alekseev I.Yu, Antov A.P., Avgoloupis S.J., et al., 2001. Kinematika i Fizika Nebesnykh Tel, vol. 17, no. 2, p. 147.
Alekseev I.Yu., Baranovsky E.A., Gershberg R.E., et al. 2003. Astron. Rep., vol. 47, p. 312.
Alekseev I.Yu., Kozhevnikova A.V., 2017. Astron. Rep., vol. 61, no. 3, pp. 221–232.
Berdyugin A.V., Gershberg R.E., Il’in I.V., et al., 1995. Izv. Krymsk. Astrofiz. Observ., vol. 89, pp. 81–93. (In Russ.)
Boller T., Freyberg M.J., Truemper J., et al., 2016. Astron. Astrophys., vol. 588, id. A103.
Butters O.W., West R.G., Anderson D.R., et al., 2010. Astron. Astrophys., vol. 520, id. L10.
Chugainov P.F., 1965. Izv. Krymsk. Astrofiz. Observ., vol. 33, pp. 215–225. (In Russ.)
Chugainov P.F., 1969. Izv. Krymsk. Astrofiz. Observ., vol. 40, pp. 33–38. (In Russ.)
Chugainov P.F., 1972. Izv. Krymsk. Astrofiz. Observ., vol. 44, pp. 3–10. (In Russ.)
Domingo A., Caballero M.D., Figueras F., et al., 2003. Astron. Astrophys., vol. 411, p. L281.
ESA, 1997. The Hipparcos and Tycho catalogues. Astrometric and photometric star catalogues derived from the ESA
Hipparcos Space Astrometry Mission, Noordwijk, Netherlands: ESA Publications Division, vol. 1200.
Favata F., Reale F., Micela G., et al., 2000. Astron. Astrophys., vol. 353, pp. 987–997.
Gershberg R.E., Chugainov P.F., 1969. Izv. Krymsk. Astrofiz. Observ., vol. 40, pp. 7–25. (In Russ.)
Gershberg R.E., Shakhovskaya N.I., 1983. Astrophys. Space Sci., vol. 95, pp. 235–253.
Gershberg R.E., Petrov P.P., 1986. In Mirzoyan L.V. (Ed.), Flare stars and related objects. Yerevan: Publishing house of the Academy of Sciences of the Armenian SSR, p. 37. (In Russ.)
Gershberg R.E., 2017. Izv. Krymsk. Astrofiz. Observ., vol. 113, iss. 1, pp. 36–77. (In Russ.)
Gershberg R.E., Kleeorin N.I., Pustil’nik L.A., Shlyapnikov A.A., 2020. Physics of mid- and low-mass stars with solartype activity. Moscow: FISMATLIT. (In Russ.)
Gorbachev M.A., Shlyapnikov A.A., 2020. 24th All-Russian Annual Conference on Solar Physics, Proceedings, SPb, pp. 73–76. (In Russ.)
Gorbachev M.A., Shlyapnikov A.A., 2021. 25th All-Russian Annual Conference on Solar Physics, Proceedings, SPb, pp. 97–100. (In Russ.)
Hog E., Fabricius C., Makarov V.V., et al., 2000. Astron. Astrophys., vol. 355, pp. L27–L30.
Kochanek C.S., Shappee B.J., Stanek K.Z., et al., 2017. Publ. Astron. Soc. Pacific, vol. 129, iss. 980, p. 104502.
Lippincott S.L., 1952. Astrophys. J., vol. 115, p. 582. Lovell B., Chugainov P.F., 1964. Nature, vol. 203, p. 1213.
Maehara H., 2014. J. Space Sci. Inform. Japan, vol. 3, pp. 119–127.
Muheki P., Guenther E.W., Mutabazi T., et al., 2020. Mon. Not. Roy. Astron. Soc., vol. 499, iss. 4, pp. 5047—5058.
Ochsenbein F., Bauer P., Marcout J., 2000. Astron. Astrophys. Suppl., vol. 143, p. 23.
Pettersen B.R., 1980. Astron. J., vol. 85, pp. 871—874.
Pollacco D.L., Skillen I., Collier Cameron A., et al., 2006. Publ. Astron. Soc. Pacific, vol. 118, iss. 848, pp. 1407–1418.
Ricker G.R.,Winn J.N., Vanderspek R., et al., 2015. J. Astron. Telesc. Instrum. Syst., vol. 1, id. 014003.
Shakhovskoy N.M., Efimov Yu.S. Izv., 1972. Krymsk. Astrofiz. Observ., vol. 45, pp. 111–117. (In Russ.)
Shibayama T., Maehara H., Notsu S., et al., 2013. Astrophys. J. Suppl., vol. 209, iss. 1, id. 5.
Shvartsman V.F., Beskin G.M., Gehrshberg R.E., et al., 1988. Pis’ma Astron. Zurn., vol. 14, pp. 233–239.
Stassun K.G., Oelkers R.J., Paegert M., et al., 2019. Astron. J., vol. 158, iss. 4, id. 138, p. 21.
Ueda Y., Ishisaki Y., Takahashi T., et al., 2001. Astrophys. J. Suppl. Ser., vol. 133, iss. 1, pp. 1–52.
Wenger M., Ochsenbein F., Egret D., et al., 2000. Astron. Astrophys. Suppl., vol. 143, pp. 9–22.
Wozniak P.R., Vestrand W.T., Akerlof C.W., et al., 2004. Astron. J., vol. 127, iss. 4, pp. 2436–2449.
Zhilyaev B.E., Romanyuk Ya.O., Svyatogorov O.A., et al., 2007. Astron. Astrophys., vol. 465, iss. 1, pp. 235–240.

Article Details

How to Cite
Shlyapnikov A., Gorbachev M., 2022. Acta Astrophysica Taurica, vol. 3, no. 2, pp. 39-45. Available at: https://astrophysicatauricum.org/index.php/aat/article/view/45 (Accessed: 6July2022)
Section
Magnetism and activity of the Sun and stars – 2021 Conference proceedings