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• W3101809883 endingPage "A26" @default.
• W3101809883 startingPage "A26" @default.
• W3101809883 abstract "The exoplanet HD 97658 b provides a rare opportunity to probe the atmospheric composition and evolution of moderately irradiated super-Earths. It transits a bright K star at a moderate orbital distance of 0.08 au. Its low density is compatible with a massive steam envelope that could photodissociate at high altitudes and become observable as escaping neutral hydrogen. Our analysis of three transits with HST/STIS at Lyman-α reveals no such signature, suggesting that the thermosphere of HD 97658 b is not hydrodynamically expanding and is subjected to a low escape of neutral hydrogen (<108 g s-1 at 3σ). Using HST/STIS Lyman-α observations and Chandra/ACIS-S and XMM-Newton/EPIC X-ray observations at different epochs, we find that HD 97658 is in fact a weak and soft X-ray source with signs of chromospheric variability in the Lyman-α line core. We determine an average reference for the intrinsic Lyman-α line and X-EUV (XUV) spectrum of the star, and show that HD 97658 b is in mild conditions of irradiation compared to other known evaporating exoplanets with an XUV irradiation about three times lower than the evaporating warm Neptune GJ436 b. This could be the reason why the thermosphere of HD 97658 b is not expanding: the low XUV irradiation prevents an efficient photodissociation of any putative steam envelope. Alternatively, it could be linked to a low hydrogen content or inefficient conversion of the stellar energy input. The HD 97658 system provides clues for understanding the stability of low-mass planet atmospheres in terms of composition, planetary density, and irradiation. Our study of HD 97658 b can be seen as a control experiment of our methodology, confirming that it does not bias detections of atmospheric escape and underlining its strength and reliability. Our results show that stellar activity can be efficiently discriminated from absorption signatures by a transiting exospheric cloud. They also highlight the potential of observing the upper atmosphere of small transiting planets to probe their physical and chemical properties." @default.
• W3101809883 created "2020-11-23" @default.
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• W3101809883 date "2016-12-19" @default.
• W3101809883 modified "2023-09-25" @default.
• W3101809883 title "No hydrogen exosphere detected around the super-Earth HD 97658 b" @default.
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• W3101809883 cites W1834709580 @default.
• W3101809883 cites W1965176092 @default.
• W3101809883 cites W1965833171 @default.
• W3101809883 cites W1966888770 @default.
• W3101809883 cites W1972187906 @default.
• W3101809883 cites W1973973816 @default.
• W3101809883 cites W1977126129 @default.
• W3101809883 cites W1977583214 @default.
• W3101809883 cites W1982331924 @default.
• W3101809883 cites W1982549782 @default.
• W3101809883 cites W1994302261 @default.
• W3101809883 cites W1997376795 @default.
• W3101809883 cites W1998589258 @default.
• W3101809883 cites W2001375089 @default.
• W3101809883 cites W2002739300 @default.
• W3101809883 cites W2007276858 @default.
• W3101809883 cites W2007665402 @default.
• W3101809883 cites W2011930844 @default.
• W3101809883 cites W2024680894 @default.
• W3101809883 cites W2037170534 @default.
• W3101809883 cites W2050155687 @default.
• W3101809883 cites W2065182615 @default.
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• W3101809883 cites W2066154329 @default.
• W3101809883 cites W2084238323 @default.
• W3101809883 cites W2091755242 @default.
• W3101809883 cites W2093492873 @default.
• W3101809883 cites W2095965170 @default.
• W3101809883 cites W2098846125 @default.
• W3101809883 cites W2099354986 @default.
• W3101809883 cites W2103592299 @default.
• W3101809883 cites W2106817835 @default.
• W3101809883 cites W2110455986 @default.
• W3101809883 cites W2113695865 @default.
• W3101809883 cites W2113805042 @default.
• W3101809883 cites W2115171714 @default.
• W3101809883 cites W2115467455 @default.
• W3101809883 cites W2115716286 @default.
• W3101809883 cites W2117454493 @default.
• W3101809883 cites W2117615467 @default.
• W3101809883 cites W2119700060 @default.
• W3101809883 cites W2125819523 @default.
• W3101809883 cites W2135760980 @default.
• W3101809883 cites W2142124984 @default.
• W3101809883 cites W2144895050 @default.
• W3101809883 cites W2148848444 @default.
• W3101809883 cites W2150572032 @default.
• W3101809883 cites W2163940516 @default.
• W3101809883 cites W2166854848 @default.
• W3101809883 cites W2181311920 @default.
• W3101809883 cites W2187737054 @default.
• W3101809883 cites W2331010765 @default.
• W3101809883 cites W3098396644 @default.
• W3101809883 cites W3098443801 @default.
• W3101809883 cites W3098630487 @default.
• W3101809883 cites W3098915449 @default.
• W3101809883 cites W3100195645 @default.
• W3101809883 cites W3100717866 @default.
• W3101809883 cites W3101201317 @default.
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• W3101809883 doi "https://doi.org/10.1051/0004-6361/201629253" @default.
• W3101809883 hasPublicationYear "2016" @default.
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