Spectroscopic observations of flares and superflares on AU Mic

J 2025

Spectroscopic observations of flares and superflares on AU Mic

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

Základní údaje

Originální název

Spectroscopic observations of flares and superflares on AU Mic

Autoři

ODERT, P.; M. LEITZINGER; R. GREIMEL; Petr KABÁTH; J. LIPTAK; Petr HEINZEL; R. KARJALAINEN; J. WOLLMANN; E. W. GUENTHER; Marek SKARKA; J. SRBA; Petr ŠKODA; J. FRYDA; R. BRAHM; L. VANZI a Jan JANÍK

Vydání

Monthly Notices of the Royal Astronomical Society, Oxford University Press, 2025, 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; stars: flare; stars: individual: AU Mic

Štítky

14312040, rivok

Příznaky

Mezinárodní význam, Recenzováno

Změněno: 5. 3. 2025 12:03, Mgr. Marie Novosadová Šípková, DiS.

Anotace

V originále

The young active flare star AU Mic is the planet host star with the highest flare rate from Transiting Exoplanet Survey Satellite data. Therefore, it represents an ideal target for dedicated ground-based monitoring campaigns with the aim to characterize its numerous flares spectroscopically. We performed such spectroscopic monitoring with the ESO1.52-m telescope of the PLATOSpec consortium. In more than 190 h of observations, we find 24 flares suitable for detailed analysis. We compute their parameters (duration, peak flux, and energy) in eight chromospheric lines (H alpha, H beta, H gamma, H delta, Na I D1&D2, He I D3, He I 6678) and investigate their relationships. Furthermore, we obtained simultaneous photometric observations and low-resolution spectroscopy for part of the spectroscopic runs. We detect one flare in the g'-band photometry, which is associated with a spectroscopic flare. Additionally, an extreme flare event occurred on 2023-09-16 of which only a time around its possible peak was observed, during which chromospheric line fluxes were raised by up to a factor of three compared to the following night. The estimated energy of this event is around 10(33) erg in H alpha alone, i.e. a rare chromospheric line superflare.

Citovat

ODERT, P.; M. LEITZINGER; R. GREIMEL; Petr KABÁTH; J. LIPTAK; Petr HEINZEL; R. KARJALAINEN; J. WOLLMANN; E. W. GUENTHER; Marek SKARKA; J. SRBA; Petr ŠKODA; J. FRYDA; R. BRAHM; L. VANZI a Jan JANÍK. Spectroscopic observations of flares and superflares on AU Mic. Monthly Notices of the Royal Astronomical Society. Oxford University Press, 2025, roč. 537, č. 1, s. 537-579. ISSN 0035-8711. Dostupné z: https://doi.org/10.1093/mnras/stae2752.

@article{2480504,
   author = {Odert, P. and Leitzinger, M. and Greimel, R. and Kabáth, Petr and Liptak, J. and Heinzel, Petr and Karjalainen, R. and Wollmann, J. and Guenther, E. W. and Skarka, Marek and Srba, J. and Škoda, Petr and Fryda, J. and Brahm, R. and Vanzi, L. and Janík, Jan},
   article_number = {1},
   doi = {https://doi.org/10.1093/mnras/stae2752},
   keywords = {stars: activity; stars: flare; stars: individual: AU Mic},
   language = {eng},
   issn = {0035-8711},
   journal = {Monthly Notices of the Royal Astronomical Society},
   title = {Spectroscopic observations of flares and superflares on AU Mic},
   url = {https://academic.oup.com/mnras/article/537/1/537/7923534},
   volume = {537},
   year = {2025}
}

TY  - JOUR
ID  - 2480504
AU  - Odert, P. - Leitzinger, M. - Greimel, R. - Kabáth, Petr - Liptak, J. - Heinzel, Petr - Karjalainen, R. - Wollmann, J. - Guenther, E. W. - Skarka, Marek - Srba, J. - Škoda, Petr - Fryda, J. - Brahm, R. - Vanzi, L. - Janík, Jan
PY  - 2025
TI  - Spectroscopic observations of flares and superflares on AU Mic
JF  - Monthly Notices of the Royal Astronomical Society
VL  - 537
IS  - 1
SP  - 537-579
EP  - 537-579
PB  - Oxford University Press
SN  - 00358711
KW  - stars: activity
KW  - stars: flare
KW  - stars: individual: AU Mic
UR  - https://academic.oup.com/mnras/article/537/1/537/7923534
N2  - The young active flare star AU Mic is the planet host star with the highest flare rate from Transiting Exoplanet Survey Satellite data. Therefore, it represents an ideal target for dedicated ground-based monitoring campaigns with the aim to characterize its numerous flares spectroscopically. We performed such spectroscopic monitoring with the ESO1.52-m telescope of the PLATOSpec consortium. In more than 190 h of observations, we find 24 flares suitable for detailed analysis. We compute their parameters (duration, peak flux, and energy) in eight chromospheric lines (H alpha, H beta, H gamma, H delta, Na I D1&D2, He I D3, He I 6678) and investigate their relationships. Furthermore, we obtained simultaneous photometric observations and low-resolution spectroscopy for part of the spectroscopic runs. We detect one flare in the g'-band photometry, which is associated with a spectroscopic flare. Additionally, an extreme flare event occurred on 2023-09-16 of which only a time around its possible peak was observed, during which chromospheric line fluxes were raised by up to a factor of three compared to the following night. The estimated energy of this event is around 10(33) erg in H alpha alone, i.e. a rare chromospheric line superflare.
ER  -

ODERT, P.; M. LEITZINGER; R. GREIMEL; Petr KABÁTH; J. LIPTAK; Petr HEINZEL; R. KARJALAINEN; J. WOLLMANN; E. W. GUENTHER; Marek SKARKA; J. SRBA; Petr ŠKODA; J. FRYDA; R. BRAHM; L. VANZI a Jan JANÍK. Spectroscopic observations of flares and superflares on AU Mic. \textit{Monthly Notices of the Royal Astronomical Society}. Oxford University Press, 2025, roč.~537, č.~1, s.~537-579. ISSN~0035-8711. Dostupné z: https://doi.org/10.1093/mnras/stae2752.

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