aat Acta Astrophys. Tau. Acta Astrophysica Taurica 2712-925X Kiselev Nikolai Nikolaevich, Mosсow, settlement Moskovskii, Tat'yanin Park Str., 12, Moscow, Russia. RU 49 10.34898/aat.vol3.iss3.pp4-7 Сonference proceedings FUors, EXors, and the role of intermediate objects Magakian Tigran Movsessian T.A. Andreasyan H.R. Byurakan Astrophysical Observatory, 0213, Aragatsotn reg., Armenia Byurakan Astrophysical Observatory, 0213, Aragatsotn reg., Armenia Byurakan Astrophysical Observatory, 0213, Aragatsotn reg., Armenia 22 12 2022 3 3 4 7 19 10 2022 Copyright (c) Magakian T., Movsessian T., Andreasyan H. Magakian T., Movsessian T., Andreasyan H. The metadata for this submission is licensed under a Creative Commons Attribution 4.0 International License. Copyright and publishing rights for texts published in Acta Astrophysica Taurica is retained by the authors, with first publication rights granted to the journal.Texts are free to use with proper attribution and link to the licensing (Creative Commons Attribution 4.0 International).

The studies of FUors, EXors, and other young eruptive stars are very important for understanding the earliest stages of pre-main-sequence evolution. We describe the current situation in this field. This is a short version of the review presented at the conference "Non-Stationary Processes in the Protoplanetary Disks and Their Observational Manifestations" held at the Crimean Astrophysical Observatory.

young variable stars eruptive activity FUors EXors This work was partly supported by RA State Committee of Science, in the frames of the research project 21T-1C031. Ambartsumian V.A., 1971. Astrofizika, vol. 7, p. 557. (In Russ.) Andreasyan H.R., 2021. Res. Astron. Astrophys., vol. 21, p. 064. Andreasyan H.R., Magakian T.Yu., Movsessian T.A., Moiseev A.V., 2021. Astrophysics, vol. 64, p. 187. Audard M., Ábráham P., Dunham M.M., et al., 2014. In Beuther H., Klessen Ralf S., Dullemond Cornelis P., and Henning T. (Eds.), Protostars and Planets VI. University of Arizona Press, Tucson, pp. 387–410. Connelley M.S., Reipurth B., 2018, Astrophys. J., vol. 861, p. 145. Contreras Peña C., Lucas P.W., Kurtev R., et al., 2017. Mon. Not. Roy. Astron. Soc., vol. 465, p. 3039. Giannini T., Giunta A., Gangi M., et al., 2022. Astrophys. J., vol. 929, p. 129. Gyulbudaghian A.L., Magakian T.Yu., 1977. Pis’ma Astron. Zhurn., vol. 3, p. 113. Gyulbudagyan A.L., Sarkisyan R.A., 1977. Astron. Tsirk., vol. 972, p. 7. Herbig G.H., 1960. Astrophys. J. Suppl. Ser., vol. 4, p. 337. Herbig G.H., 1966. Vistas in Astronomy, vol. 8, p. 109. Herbig G.H., 1977. Astrophys. J., vol. 217, p. 693. Herbig G.H., 1989. ESO Workshop on Low Mass Star Formation and Pre-Main Sequence Objects, pp. 233–246. Herbig G.H., 2008. Astron. J., vol. 135, p. 637. Hillenbrand L.A., Isaacson H., Rodriguez A.C., et al., 2022. Astron. J., vol. 163, p. 115. Lorenzetti D., Antoniucci S., Giannini T., et al., 2012. Astrophys. J., vol. 749, p. 188. Magakian T.Yu., Movsessian T.A., Andreasyan H.R., Gevorgyan M.H., 2019. Astron. Astrophys., vol. 625, p. A13. McNeil J.W., Reipurth B., Meech K., 2004. IAU Circ., no. 8284. Moody M.S.L., Stahler S.W., 2017. Astron. Astrophys., vol. 600, p. 133. Semkov E.H., Ibryamov S.I., Peneva S.P., 2017. Bulg. Astron. J., vol. 27, p. 75.