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

J 2022

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

LIŠKA, Jiří, René HUDEC, Zdeněk MIKULÁŠEK, Miloslav ZEJDA, Jan JANÍK et. al.

Basic information

Original name

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

Authors

LIŠKA, Jiří (203 Czech Republic), René HUDEC (203 Czech Republic), Zdeněk MIKULÁŠEK (203 Czech Republic, belonging to the institution), Miloslav ZEJDA (203 Czech Republic, belonging to the institution), Jan JANÍK (203 Czech Republic, guarantor, belonging to the institution) and Jan ŠTROBL (203 Czech Republic)

Edition

Revista Mexicana de Astronomia y Astrofisica, MEXICO CITY, Universidad Nacional Autonoma de Mexico, 2022, 0185-1101

Other information

Language

English

Type of outcome

Článek v odborném periodiku

Field of Study

10308 Astronomy

Country of publisher

Mexico

Confidentiality degree

není předmětem státního či obchodního tajemství

References:

URL

Impact factor

Impact factor: 1.000

RIV identification code

RIV/00216224:14310/22:00126533

Organization unit

Faculty of Science

DOI

http://dx.doi.org/10.22201/ia.01851101p.2022.58.01.12

UT WoS

000782723100013

Keywords in English

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

Abstract

V originále

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).

Citovat

LIŠKA, Jiří, René HUDEC, Zdeněk MIKULÁŠEK, Miloslav ZEJDA, Jan JANÍK and Jan ŠTROBL. CZEV502-AN M DWARF NEAR THE LEO TRIPLET WITH VERY STRONG FLARES. Revista Mexicana de Astronomia y Astrofisica. MEXICO CITY: Universidad Nacional Autonoma de Mexico, 2022, vol. 58, No 1, p. 155-168. ISSN 0185-1101. Available from: https://dx.doi.org/10.22201/ia.01851101p.2022.58.01.12.

@article{2213764,
   author = {Liška, Jiří and Hudec, René and Mikulášek, Zdeněk and Zejda, Miloslav and Janík, Jan and Štrobl, Jan},
   article_location = {MEXICO CITY},
   article_number = {1},
   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},
   language = {eng},
   issn = {0185-1101},
   journal = {Revista Mexicana de Astronomia y Astrofisica},
   title = {CZEV502-AN M DWARF NEAR THE LEO TRIPLET WITH VERY STRONG FLARES},
   url = {http://www.astroscu.unam.mx/rmaa/RMxAA..58-1/PDF/RMxAA..58-1_jliska-XII.pdf},
   volume = {58},
   year = {2022}
}

TY  - JOUR
ID  - 2213764
AU  - Liška, Jiří - Hudec, René - Mikulášek, Zdeněk - Zejda, Miloslav - Janík, Jan - Štrobl, Jan
PY  - 2022
TI  - CZEV502-AN M DWARF NEAR THE LEO TRIPLET WITH VERY STRONG FLARES
JF  - Revista Mexicana de Astronomia y Astrofisica
VL  - 58
IS  - 1
SP  - 155-168
EP  - 155-168
PB  - Universidad Nacional Autonoma de Mexico
SN  - 01851101
KW  - methods: observational
KW  - stars: flare
KW  - stars: variables: general
KW  - surveys
KW  - techniques: photometric
KW  - X-rays: stars
UR  - http://www.astroscu.unam.mx/rmaa/RMxAA..58-1/PDF/RMxAA..58-1_jliska-XII.pdf
N2  - 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).
ER  -

LIŠKA, Jiří, René HUDEC, Zdeněk MIKULÁŠEK, Miloslav ZEJDA, Jan JANÍK and Jan ŠTROBL. CZEV502-AN M DWARF NEAR THE LEO TRIPLET WITH VERY STRONG FLARES. \textit{Revista Mexicana de Astronomia y Astrofisica}. MEXICO CITY: Universidad Nacional Autonoma de Mexico, 2022, vol.~58, No~1, p.~155-168. ISSN~0185-1101. Available from: https://dx.doi.org/10.22201/ia.01851101p.2022.58.01.12.

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