Evaporation, from exoplanets to exocomets by Lecavelier des Etangs, Alain

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The Appearance and Disappearance of Exocomet Gas Absorption by Barry Y. Welsh, Sharon L. Montgomery

“…This variability is due to the liberation of gas from falling evaporating bodies (the so-called FEBs activity) on the grazing approach of exocomets towards their parent star. Also we present archival spectra of the FeI λ3860 Å and CaII K-lines towards β Pictoris (HD 39060) that, for the first time, reveal the absorption signatures of FEB activity at similar velocities in both line profiles. …”
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