Superflare activity on the southern active binary CC Eri

Superflares are a subject of interest for the last decade when the first statistical analysis ofsuperflares was conducted. So far superflares have been observed spectroscopically recently inHalpha only and in the past very rarely. We present Echelle spectroscopic monitoring of theyoung and active southern dK+dM dwarf binary CC Eri. More than 2000 spectra have been recordedsumming up to 190 hours of on source time. The spectra have been obtained through thePlatoSpec consortium at the ESO1.52m telescope on LaSilla, Chile. In addition to the spectroscopicmonitoring, the ESO1.52m is capable of doing ccordinated g'-band photometry. We havedetected so far 18 flares determined from Halpha equivalent width light curves and two fromphotometry. The two g'-band flares reveal superflare energies and one Halpha flare aloneshows already superflare energies. We have identified several line asymmetries occuring duringthe flares from which we show two examples. We furthermore discuss preliminary results ofcomparative spectral line analysis between flares and superflares. Theme(s): The Sun and Cool Stars in the Time Domain, Cool Stars as Stellar Systems

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Publication Details

Journal
Zenodo (CERN European Organization for Nuclear Research)
Published
2024-09-02
DOI
https://doi.org/10.5281/zenodo.13627897
Primary Topic
PI3K/AKT/mTOR signaling in cancer
Type
article
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article

Superflare activity on the southern active binary CC Eri

Zenodo (CERN European Organization for Nuclear Research)
PI3K/AKT/mTOR signaling in cancer
article

Superflare activity on the southern active binary CC Eri

article en

Abstract

Superflares are a subject of interest for the last decade when the first statistical analysis ofsuperflares was conducted. So far superflares have been observed spectroscopically recently inHalpha only and in the past very rarely. We present Echelle spectroscopic monitoring of theyoung and active southern dK+dM dwarf binary CC Eri. More than 2000 spectra have been recordedsumming up to 190 hours of on source time. The spectra have been obtained through thePlatoSpec consortium at the ESO1.52m telescope on LaSilla, Chile. In addition to the spectroscopicmonitoring, the ESO1.52m is capable of doing ccordinated g'-band photometry. We havedetected so far 18 flares determined from Halpha equivalent width light curves and two fromphotometry. The two g'-band flares reveal superflare energies and one Halpha flare aloneshows already superflare energies. We have identified several line asymmetries occuring duringthe flares from which we show two examples. We furthermore discuss preliminary results ofcomparative spectral line analysis between flares and superflares. Theme(s): The Sun and Cool Stars in the Time Domain, Cool Stars as Stellar Systems

Zenodo (CERN European Organization for Nuclear Research)
University of Graz (AT), Czech Academy of Sciences, Astronomical Institute (CZ), Thüringer Landessternwarte Tautenburg (DE), Rajiv Gandhi Charitable Trust (IN)
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PI3K/AKT/mTOR signaling in cancer
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