Publication details
CZEV502-AN M DWARF NEAR THE LEO TRIPLET WITH VERY STRONG FLARES
| Authors | |
|---|---|
| Year of publication | 2022 |
| Type | Article in Periodical |
| Magazine / Source | Revista Mexicana de Astronomia y Astrofisica |
| MU Faculty or unit | |
| Citation | |
| Web | http://www.astroscu.unam.mx/rmaa/RMxAA..58-1/PDF/RMxAA..58-1_jliska-XII.pdf |
| Doi | http://dx.doi.org/10.22201/ia.01851101p.2022.58.01.12 |
| Keywords | methods: observational; stars: flare; stars: variables: general; surveys; techniques: photometric; X-rays: stars |
| Description | Discovery of flares in the M dwarf CzeV502 and our follow-up results are presented. We classify it as a dMe eruptive variable of UV Ceti type due to the X-ray activity, measured B -V of 1.5 mag, H alpha emission, and flares. Our monitoring revealed only one reliable and one suspected superflare in 58 nights (210 hrs). The strongest flare with Delta R = 1.5 mag (Delta B approximate to 6-8 mag) could have a total energy of 3E+34 erg. The ASAS-SN data may contain 4 events up to Delta V of 0.43 mag and 12.55 d periodicity corresponding to the rotation or possible binarity. Other brightenings in sky survey (ASAS-3, CRTS, NSVS, and KWS) are doubtful. No event was unveiled on the 1600 photographic plates. The upper rate limit of 1-2 superflares/1 640 hrs corresponds to activity several orders higher than for other M-dwarfs, especially, for the slow rotators. The low amplitude flares (Delta B < 0.5 mag) may be common (1 flare/4 hrs). |