Flares and superflares on the southern active binary CC Eri

J 2026

Flares and superflares on the southern active binary CC Eri

LEITZINGER, M.; P. ODERT; R. GREIMEL; P. KABATH; J. LIPTAK et al.

Základní údaje

Originální název

Flares and superflares on the southern active binary CC Eri

Autoři

Vydání

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, OXFORD, OXFORD UNIV PRESS, 2026, 0035-8711

Další údaje

Jazyk

angličtina

Typ výsledku

Článek v odborném periodiku

Obor

10308 Astronomy

Stát vydavatele

Velká Británie a Severní Irsko

Utajení

není předmětem státního či obchodního tajemství

Odkazy

URL

Impakt faktor

Impact factor: 4.800 v roce 2024

Označené pro přenos do RIV

Ano

Organizační jednotka

Přírodovědecká fakulta

Klíčová slova anglicky

stars: activity; binaries: spectroscopic; stars: flare; stars: individual: CC Eri

Štítky

14312040, rivok

Příznaky

Mezinárodní význam, Recenzováno

Změněno: 8. 6. 2026 10:08, Mgr. Marie Novosadová Šípková, DiS.

Anotace

V originále

Flares and coronal mass ejections are known to be the dominating high-energy phenomena on cool stars. Superflares were thoroughly investigated using broad-band photometry predominantly from Kepler, K2, and TESS. Here, we present a spectroscopic investigation of superflares on the very active spectroscopic binary CC Eri. We focus on spectroscopic signatures of (super)-flares and line asymmetries with the goal to characterize superflares spectroscopically. In 70 nights of spectroscopic observations obtained at the ESO 1.52-m telescope with the Echelle spectrograph PUCHEROS+ hosted by the PLATOSpec consortium, we identified 31 flares from which two are superflares already from the deduced g$<^>{\prime }$-band energies. We also find a broad blue-wing asymmetry occurring in the impulsive phase of another superflare which shows great potential to be a prominence eruption. For the second most luminous flare, we find the largest number of excess emissions during the impulsive and gradual flare. We identify the flare to be occurring close to the stellar limb which indicates that the flare was even more energetic than derived from its g$<^>{\prime }$-band and spectral line energies. We identify more than 60 spectral lines in the spectral range of 4100 and 7200 & Aring; showing excess emission during this flare. We detect continuum enhancements as well as photospheric line fillings during the flare. Generally, we find that depending on the flare energy the number of spectral lines revealing excess emission increases, especially for the more energetic superflares. We therefore conclude that superflares are likely scaled-up versions of less energetic normal flares.

Přiložené soubory

2576820.pdf

Požádat o autorskou verzi souboru

Citovat

LEITZINGER, M.; P. ODERT; R. GREIMEL; P. KABATH; J. LIPTAK; E. W. GUENTHER; P. HEINZEL; P. GAJDOS; M. ORNIK; J. WOLLMANN; M. SKARKA; J. SRBA; P. SKODA; J. FRYDA; R. BRAHM; L. VANZI; Jan JANÍK a P. PINTR. Flares and superflares on the southern active binary CC Eri. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY. OXFORD: OXFORD UNIV PRESS, 2026, roč. 545, č. 4, s. 1-47. ISSN 0035-8711. Dostupné z: https://doi.org/10.1093/mnras/staf1993.

@article{2576820,
   author = {Leitzinger, M. and Odert, P. and Greimel, R. and Kabath, P. and Liptak, J. and Guenther, E. W. and Heinzel, P. and Gajdos, P. and Ornik, M. and Wollmann, J. and Skarka, M. and Srba, J. and Skoda, P. and Fryda, J. and Brahm, R. and Vanzi, L. and Janík, Jan and Pintr, P.},
   article_location = {OXFORD},
   article_number = {4},
   doi = {https://doi.org/10.1093/mnras/staf1993},
   keywords = {stars: activity; binaries: spectroscopic; stars: flare; stars: individual: CC Eri},
   language = {eng},
   issn = {0035-8711},
   journal = {MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY},
   title = {Flares and superflares on the southern active binary CC Eri},
   url = {https://academic.oup.com/mnras/article/545/4/staf1993/8371771},
   volume = {545},
   year = {2026}
}

TY  - JOUR
ID  - 2576820
AU  - Leitzinger, M. - Odert, P. - Greimel, R. - Kabath, P. - Liptak, J. - Guenther, E. W. - Heinzel, P. - Gajdos, P. - Ornik, M. - Wollmann, J. - Skarka, M. - Srba, J. - Skoda, P. - Fryda, J. - Brahm, R. - Vanzi, L. - Janík, Jan - Pintr, P.
PY  - 2026
TI  - Flares and superflares on the southern active binary CC Eri
JF  - MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
VL  - 545
IS  - 4
SP  - 1-47
EP  - 1-47
PB  - OXFORD UNIV PRESS
SN  - 00358711
KW  - stars: activity
KW  - binaries: spectroscopic
KW  - stars: flare
KW  - stars: individual: CC Eri
UR  - https://academic.oup.com/mnras/article/545/4/staf1993/8371771
N2  - Flares and coronal mass ejections are known to be the dominating high-energy phenomena on cool stars. Superflares were thoroughly investigated using broad-band photometry predominantly from Kepler, K2, and TESS. Here, we present a spectroscopic investigation of superflares on the very active spectroscopic binary CC Eri. We focus on spectroscopic signatures of (super)-flares and line asymmetries with the goal to characterize superflares spectroscopically. In 70 nights of spectroscopic observations obtained at the ESO 1.52-m telescope with the Echelle spectrograph PUCHEROS+ hosted by the PLATOSpec consortium, we identified 31 flares from which two are superflares already from the deduced g$<^>{\prime }$-band energies. We also find a broad blue-wing asymmetry occurring in the impulsive phase of another superflare which shows great potential to be a prominence eruption. For the second most luminous flare, we find the largest number of excess emissions during the impulsive and gradual flare. We identify the flare to be occurring close to the stellar limb which indicates that the flare was even more energetic than derived from its g$<^>{\prime }$-band and spectral line energies. We identify more than 60 spectral lines in the spectral range of 4100 and 7200 & Aring; showing excess emission during this flare. We detect continuum enhancements as well as photospheric line fillings during the flare. Generally, we find that depending on the flare energy the number of spectral lines revealing excess emission increases, especially for the more energetic superflares. We therefore conclude that superflares are likely scaled-up versions of less energetic normal flares.
ER  -

LEITZINGER, M.; P. ODERT; R. GREIMEL; P. KABATH; J. LIPTAK; E. W. GUENTHER; P. HEINZEL; P. GAJDOS; M. ORNIK; J. WOLLMANN; M. SKARKA; J. SRBA; P. SKODA; J. FRYDA; R. BRAHM; L. VANZI; Jan JANÍK a P. PINTR. Flares and superflares on the southern active binary CC Eri. \textit{MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY}. OXFORD: OXFORD UNIV PRESS, 2026, roč.~545, č.~4, s.~1-47. ISSN~0035-8711. Dostupné z: https://doi.org/10.1093/mnras/staf1993.

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