Influence of stellar X-ray luminosity distribution and its evolution on exoplanetary mass loss

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dc.creatorPenz, T.
dc.creatorMicela, G.
dc.creatorLammer, H.
dc.date2007-10-18
dc.date.accessioned2026-07-07T08:37:06Z
dc.date.available2026-07-07T08:37:06Z
dc.descriptionAims: We investigate the influence of high-energy stellar radiation at close-in orbits on atmospheric mass loss during stellar evolution of a G-type star. Methods: High-energy stellar luminosity varies over a wide range for G field stars. The temporal evolution of the distribution of stellar X-ray luminosity and its influence on the evolution of close-in exoplanets is investigated. X-ray luminosity distributions from the Pleiades, the Hyades and the field are used to derive a scaling law for the evolution of the stellar X-ray luminosity distribution. A modified energy-limited escape approach is used to calculate atmospheric mass loss for a broad range of planetary parameters. Results: We show that the evolution of close-in exoplanets strongly depends on the detailed X-ray luminosity history of their host stars, which varies over several orders-of-magnitude for G stars. Stars located at the high-energy tail of the luminosity distribution can evaporate most of its planets within 0.5 AU, while for a moderate luminosity a significant fraction of planets can survive. We show the change on an initial planetary mass distribution caused by atmospheric escape.
dc.description12 pages, 9 figures, A&A accepted
dc.identifierhttps://arxiv.org/abs/0710.3534
dc.identifierhttp://arxiv.org/abs/0710.3534
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/140287
dc.subjectAstrophysics
dc.titleInfluence of stellar X-ray luminosity distribution and its evolution on exoplanetary mass loss
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