A closer look at the most flaring stars on the Southern Hemisphere

Flares and coronal mass ejections (CMEs) play a key role in shaping the space environment of the Sun and stars and contribute to the angular momentum evolution of young, cool stars. While space-based high-cadence photometry has provided important constraints on stellar flare rates, direct detections of stellar CMEs remain elusive. On the Sun, flares and CMEs are often linked, and testing whether this connection holds for other stars is essential. We have conducted a mini-survey targeting the most active flaring stars in the southern sky to investigate this relationship. The sample, selected from TESS data using the FLATW’RM2 deep-learning flare detection code, consists of 14 stars of spectral type M-G exhibiting on average 0.5–2 flares per day in the TESS data. For each target, we obtained 10–15 hours of time-series spectroscopy with the FEROS spectrograph at the MPG/ESO 2.2 m telescope at La Silla Observatory. FEROS provides a resolving power of 48,000 and wavelength coverage from 3500 to 9200 Å in a single exposure. In this poster, we present the results of this survey