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Activity of FR Cnc from Ground-Based and Kepler Observationsстатья
- Авторы: Savanov I., Naroenkov S., Nalivkin M., Dmitrienko E.S., Pandey J.C., Karmakar S.
- Сборник: "Ground-Based Astronomy in Russia. 21st Century". Edited by I.I. Romanyuk, I.A. Yakunin, A.F. Valeev, D.O. Kudryavtsev
- Год издания: 2020
- Место издания: Снег Пятигорск
- Первая страница: 168
- Последняя страница: 170
- DOI: 10.26119/978-5-6045062-0-2_2020_168
- Аннотация: We present the results of new photometric observations of the chromospherically active star FR Cnc using ground-based robotic telescope and Kepler space telescopes. Ground-based observations were carried out from March 2 to 13, 2019, in the period of time that coincided most closely in time interval with the observations of this star with the Astrosat space telescope. Based on the V-band photometric variability of the star we have constructed a map and estimated the spots area on the surface of the star (12% of its total surface area). On March 3, 2019, a flare on FR Cnc was detected with the energy EB = 2.17×10^33 erg and EV = 1.40×10^33 erg in the B and V bands, respectively. Observations of the star with K2 Kepler mission were performed during campaigns 5 and 18. Changes in the light curves associated with the evolution of spots are clearly visible (especially during campaign 5). Observations of campaign 18 in SLC mode show a large number of flares of various amplitudes, the highest frequency of flares occurs in phases 0.1 - 0.6, which are close but do not coincide with the first of the active regions. The maximum flare energy in the Kepler telescope bandpass was 5.1×10^33 erg, and the corresponding coronal mass ejections (CME) can be up to 6×10^19 g.
- Добавил в систему: Антипин Сергей Витальевич