Publication detail

CZEV502-AN M DWARF NEAR THE LEO TRIPLET WITH VERY STRONG FLARES

LIŠKA, J. HUDEC, R. MIKULÁŠEK, Z. ZEJDA, M. JANÍK, J. ŠTROBL, J.

Original Title

CZEV502-AN M DWARF NEAR THE LEO TRIPLET WITH VERY STRONG FLARES

Type

journal article in Web of Science

Language

English

Original Abstract

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).

Keywords

methods: observational; stars: flare; stars: variables: general; surveys; techniques: photometric; X-rays: stars

Authors

LIŠKA, J.; HUDEC, R.; MIKULÁŠEK, Z.; ZEJDA, M.; JANÍK, J.; ŠTROBL, J.

Released

1. 4. 2022

ISBN

0185-1101

Periodical

REVISTA MEXICANA DE ASTRONOMIA Y ASTROFISICA

Year of study

58

Number

1

State

United Mexican States

Pages from

155

Pages to

168

Pages count

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"
}