New Chandra X-ray data and a revised age analysis indicate TOI 1227b is a very young planet whose atmosphere is being stripped at roughly 10^12 grams per second.
X-ray flares on zero-age- and pre-main sequence stars in Taurus-Auriga-Perseus
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abstract
We present results of a systematic search for X-ray flares on young stars observed during ROSAT PSPC observations of the Taurus-Auriga-Perseus region. All pointed PSPC observations currently available from the ROSAT Public Data Archive with known T Tauri stars, Pleiads, or Hyads in the field are analyzed in order to study the evolution of coronal activity. 38 large flares can be attributed to late-type stars. A flare rate is derived for the different stellar samples making use of the flare duration and the observing time. We investigate the influence of stellar parameters such as age, rotation and multiplicity on individual flare parameters and the flare frequency.
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The Age and High Energy Environment of the Very Young Transiting Exoplanet TOI 1227b
New Chandra X-ray data and a revised age analysis indicate TOI 1227b is a very young planet whose atmosphere is being stripped at roughly 10^12 grams per second.