Tootfinder

The Age and High Energy Environment of the Very Young Transiting Exoplanet TOI 1227b
Attila Varga, Joel H. Kastner, Alexander S. Binks, Hans Moritz Guenther, Simon J. Murphy
https://arxiv.org/abs/2506.04440

The Age and High Energy Environment of the Very Young Transiting Exoplanet TOI 1227b
The mid-M star TOI~1227 hosts among the youngest known transiting exoplanets. We have conducted new X-ray imaging and optical spectroscopic observations of TOI 1227 aimed at ascertaining its age and the influence of its high-energy radiation on the exoplanet, TOI 1227b. We obtained a definitive X-ray detection of TOI 1227 with Chandra/HRC-I, and measured its Li and H$α$ lines using ANU SSO 2.3 m telescope (WiFeS) spectroscopy. Through spatiokinematic, isochronal, and SED-based modeling, we hav…