Spectroscopic observations of flares and superflares on AU Mic

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A_____%2F25%3A00605556" target="_blank" >RIV/67985815:_____/25:00605556 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216224:14310/25:00140706 RIV/00216208:11320/25:10512559

Výsledek na webu

<a href="https://hdl.handle.net/11104/0365911" target="_blank" >https://hdl.handle.net/11104/0365911</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1093/mnras/stae2752" target="_blank" >10.1093/mnras/stae2752</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Spectroscopic observations of flares and superflares on AU Mic

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

Spectroscopic observations of flares and superflares on AU Mic

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10308 - Astronomy (including astrophysics,space science)

Projekt

<a href="/cs/project/GF22-30516K" target="_blank" >GF22-30516K: Supererupce: Jejich původ a spojitost s planetami</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2025

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Monthly Notices of the Royal Astronomical Society

ISSN

0035-8711

e-ISSN

1365-2966

Svazek periodika

537

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

43

Strana od-do

537-579

Kód UT WoS článku

001405786400001

EID výsledku v databázi Scopus

2-s2.0-85216470245