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LIŠKA, J. HUDEC, R. MIKULÁŠEK, Z. ZEJDA, M. JANÍK, J. ŠTROBL, J.
Originální název
CZEV502-AN M DWARF NEAR THE LEO TRIPLET WITH VERY STRONG FLARES
Typ
článek v časopise ve Web of Science, Jimp
Jazyk
angličtina
Originální abstrakt
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).
Klíčová slova
methods: observational; stars: flare; stars: variables: general; surveys; techniques: photometric; X-rays: stars
Autoři
LIŠKA, J.; HUDEC, R.; MIKULÁŠEK, Z.; ZEJDA, M.; JANÍK, J.; ŠTROBL, J.
Vydáno
1. 4. 2022
ISSN
0185-1101
Periodikum
REVISTA MEXICANA DE ASTRONOMIA Y ASTROFISICA
Ročník
58
Číslo
1
Stát
Spojené státy mexické
Strany od
155
Strany do
168
Strany počet
14
URL
http://www.astroscu.unam.mx/rmaa/RMxAA..58-1/PDF/RMxAA..58-1_jliska-XII.pdf
BibTex
@article{BUT178558, author="Jiří {Liška} and René {Hudec} and Zdeněk {Mikulášek} and Miloslav {Zejda} and Jan {Janík} and Jan {Štrobl}", title="CZEV502-AN M DWARF NEAR THE LEO TRIPLET WITH VERY STRONG FLARES", journal="REVISTA MEXICANA DE ASTRONOMIA Y ASTROFISICA", year="2022", volume="58", number="1", pages="155--168", doi="10.22201/ia.01851101p.2022.58.01.12", issn="0185-1101", url="http://www.astroscu.unam.mx/rmaa/RMxAA..58-1/PDF/RMxAA..58-1_jliska-XII.pdf" }