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Fig. 13. | Earth, Planets and Space

Fig. 13.

From: Variability of solar/stellar activity and magnetic field and its influence on planetary atmosphere evolution

Fig. 13.

Left side illustrates the size relation of exoplanets around the two M-stars EV Lacertae and Proxima Centauri with a transiting Earth analogue with an extended hydrogen atmosphere of 7REarth. Right side shows a preliminary model simulation of an extended hydrogen corona and stellar wind produced hydrogen ENAs around an Earth-size planet with an expanded hydrogen-rich thermosphere of 7REarth (Lammer et al., 2011b).

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