Optical flares from the faint mid-dM star 2MASS J00453912+4140395

Zs Kovári, F. Vilardell, I. Ribas, K. Vida, L. Van Driel-Gesztelyi, C. Jordi, K. Oláh

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10 Citations (Scopus)


We present B and V light curves of a large stellar flare obtained with the Wide Field Camera at the Isaac Newton 2.5-m telescope (La Palma). The source object is a faint (mV = 21.38) foreground star in the field of the Andromeda galaxy, with its most probable spectral type being dM4. We provide an estimate of the total flare energy in the optical range and find it to be of the order of 1035 erg. The cooling phase of the large flare shows three additional weak flare-like events, which we interpret as results of a triggering mechanism also observed on the Sun during large coronal mass ejections.

Original languageEnglish
Pages (from-to)904-908
Number of pages5
JournalAstronomische Nachrichten
Issue number9
Publication statusPublished - Sep 1 2007



  • Stars: activity
  • Stars: flare
  • Sun: coronal mass ejections (CMEs)

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

Kovári, Z., Vilardell, F., Ribas, I., Vida, K., Van Driel-Gesztelyi, L., Jordi, C., & Oláh, K. (2007). Optical flares from the faint mid-dM star 2MASS J00453912+4140395. Astronomische Nachrichten, 328(9), 904-908. https://doi.org/10.1002/asna.200710756