Exoplanet X-ray irradiation and evaporation rates with eROSITA
- High-energy irradiation is a driver for atmospheric evaporation and mass loss in exoplanets. This work is based on data from eROSITA, the soft X-ray instrument on board the Spectrum Roentgen Gamma mission, as well as on archival data from other missions. We aim to characterise the high-energy environment of known exoplanets and estimate their mass-loss rates. We use X-ray source catalogues from eROSITA, XMM-Newton, Chandra, and ROSAT to derive X-ray luminosities of exoplanet host stars in the 0.2–2 keV energy band with an underlying coronal, that is, optically thin thermal spectrum. We present a catalogue of stellar X-ray and EUV luminosities, exoplanetary X-ray and EUV irradiation fluxes, and estimated mass-loss rates for a total of 287 exoplanets, 96 of which are characterised for the first time based on new eROSITA detections. We identify 14 first-time X-ray detections of transiting exoplanets that are subject to irradiation levels known to cause observable evaporation signatures in other exoplanets. This makes them suitableHigh-energy irradiation is a driver for atmospheric evaporation and mass loss in exoplanets. This work is based on data from eROSITA, the soft X-ray instrument on board the Spectrum Roentgen Gamma mission, as well as on archival data from other missions. We aim to characterise the high-energy environment of known exoplanets and estimate their mass-loss rates. We use X-ray source catalogues from eROSITA, XMM-Newton, Chandra, and ROSAT to derive X-ray luminosities of exoplanet host stars in the 0.2–2 keV energy band with an underlying coronal, that is, optically thin thermal spectrum. We present a catalogue of stellar X-ray and EUV luminosities, exoplanetary X-ray and EUV irradiation fluxes, and estimated mass-loss rates for a total of 287 exoplanets, 96 of which are characterised for the first time based on new eROSITA detections. We identify 14 first-time X-ray detections of transiting exoplanets that are subject to irradiation levels known to cause observable evaporation signatures in other exoplanets. This makes them suitable targets for follow-up observations.…
Verfasserangaben: | Mary Grace FosterORCiDGND, Katja PoppenhägerORCiDGND, Nikoleta Ilić PetkovićORCiDGND, Axel SchwopeORCiD |
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DOI: | https://doi.org/10.1051/0004-6361/202141097 |
ISSN: | 0004-6361 |
ISSN: | 1432-0746 |
Titel des übergeordneten Werks (Englisch): | Astronomy and astrophysics : an international weekly journal |
Verlag: | EDP Sciences |
Verlagsort: | Les Ulis |
Publikationstyp: | Wissenschaftlicher Artikel |
Sprache: | Englisch |
Datum der Erstveröffentlichung: | 19.05.2022 |
Erscheinungsjahr: | 2022 |
Datum der Freischaltung: | 27.11.2023 |
Freies Schlagwort / Tag: | X-rays: stars; planet-star interactions; planets and; satellites: atmospheres; stars: activity; stars: coronae |
Band: | 661 |
Aufsatznummer: | A23 |
Seitenanzahl: | 11 |
Fördernde Institution: | Russian Space Agency (Roskosmos); Max Planck Institute for Extraterrestrial Physics (MPE); DLR; Max Planck Society |
Organisationseinheiten: | Mathematisch-Naturwissenschaftliche Fakultät / Institut für Physik und Astronomie |
DDC-Klassifikation: | 5 Naturwissenschaften und Mathematik / 52 Astronomie / 520 Astronomie und zugeordnete Wissenschaften |
Peer Review: | Referiert |
Lizenz (Deutsch): | ![]() |