3 papers
astro-ph.EP2025
The effects of stellar activity cycles on planetary atmospheric escape and the HeI 1083nm transit signature
Andrew P. Allan, Aline A. Vidotto, Jorge Sanz-Forcada +1
The HeI 1083nm transit signature is commonly used in tracing escaping planetary atmospheres. However, it can be affected by stellar activity, complicating detections and interpreta…
astro-ph.EP2025
Helium escape signatures are generally strongest during younger ages but this age dependence is lost in the diversity of observed exoplanets
Andrew P. Allan, Aline A. Vidotto
Highly irradiated exoplanets undergo extreme hydrodynamic atmospheric escape, due to their high level of received XUV flux. Over their lifetime, this escape varies significantly, m…
astro-ph.EP2025
Evolution of helium triplet transits of close-in gas giants orbiting K-dwarfs
Andrew P. Allan, Aline A. Vidotto, Carolina Villarreal D'Angelo +2
Atmospheric escape in exoplanets has traditionally been observed using hydrogen Lyman- and H- transmission spectroscopy, but more recent detections have utilised the metast…