The four young planets of V1298 Tau lose different fractions of their atmospheres, depending on the star’s spin-down behaviour (from Poppenhaeger et al. 2020).Together with my PhD student Laura Ketzer and postdoc Matthias Mallonn, we have published a new paper on the atmospheric evaporation of the four very young planets around the star V1298 Tau. We measured the star’s X-ray spectrum by combining ROSAT and Chandra observations, and found that the star is highly active with an X-ray luminosity above 10^30 erg/s. Laura developed a numerical code to estimate the planetary evaporation as the star ages and becomes less X-ray bright. Depending on the masses of the planetary cores and the age at which the star will start spinning down, some of the planets may lose their complete atmosphere by the time the star reaches the age of our Sun.
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