Spectroscopy of flares on AU Mic

Abstract

Photometric space missions like Kepler and TESS have revealed unprecedented statistics of stellar flares, including the frequent detection of highly energetic superflares. Spectroscopic characterization of flares and especially superflares, however, is still not as commonly available. In contrast to broad-band photometry, spectroscopic data can give more insights into the physical parameters of flares, as well as allowing to identify possibly accompanying CMEs. In this context, we monitored the young planet-hosting flare star AU Mic for about 60 partial nights (>160 hours) between 2022 and 2023 spectroscopically with the ESO 1.52m telescope hosted by the PLATOSpec consortium. Here, we report on the search for signatures of flares and CMEs in these data, including the partial observation of a possible extreme superflare.

5 pages, 3 figures

References in corpus (8)

• On the age of the $\beta$ Pictoris moving group
• A planet within the debris disk around the pre-main-sequence star AU Microscopii
• CERES: A Set of Automated Routines for Echelle Spectra
• The magnetic field and multiple planets of the young dwarf AU~Mic
• Flares, Rotation, and Planets of the AU Mic System from TESS Observations
• Starspot mapping with adaptive parallel tempering. II. Application to TESS data for M-dwarf flare stars, AU Microscopii, YZ Canis Minoris, and EV Lacertae
• A Seven-Day Multi-Wavelength Flare Campaign on AU Mic I: High-Time Resolution Light Curves and the Thermal Empirical Neupert Effect
• Spectroscopic observations of flares and superflares on AU Mic