Phase-resolved high-resolution spectroscopy of CoRoT-2b measures sub-synchronous rotation at 2.6-sigma significance, consistent with its western hotspot offset.
Ground-based detection of an extended helium atmosphere in the Saturn-mass exoplanet WASP-69b
3 Pith papers cite this work. Polarity classification is still indexing.
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Pith papers citing it
abstract
Hot gas giant exoplanets can lose part of their atmosphere due to strong stellar irradiation, affecting their physical and chemical evolution. Studies of atmospheric escape from exoplanets have mostly relied on space-based observations of the hydrogen Lyman-{\alpha} line in the far ultraviolet which is strongly affected by interstellar absorption. Using ground-based high-resolution spectroscopy we detect excess absorption in the helium triplet at 1083 nm during the transit of the Saturn-mass exoplanet WASP-69b, at a signal-to-noise ratio of 18. We measure line blue shifts of several km/s and post transit absorption, which we interpret as the escape of part of the atmosphere trailing behind the planet in comet-like form. [Additional notes by authors: Furthermore, we provide upper limits for helium signals in the atmospheres of the exoplanets HD 209458b, KELT-9b, and GJ 436b. We investigate the host stars of all planets with detected helium signals and those of the three planets we derive upper limits for. In each case we calculate the X-ray and extreme ultraviolet flux received by these planets. We find that helium is detected in the atmospheres of planets (orbiting the more active stars and) receiving the larger amount of irradiation from their host stars.]
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astro-ph.EP 3representative citing papers
Water- and metal-rich atmospheres on compact hot mini-Neptunes lose mass more slowly than H/He cases at high enrichment levels due to enhanced cooling and higher mean molecular weight.
The CARMENES-PLUS cooling system upgrade achieved 0.67 m/s intrinsic RV precision in the NIR channel, with nightly zero-point scatter reduced from 6.1 to 3.9 m/s and median stellar scatter from 8.8 to 6.7 m/s for slow rotators.
citing papers explorer
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Unraveling the Mystery of the Peculiar and Young Hot Jupiter CoRoT-2b II: Phase Resolved Emission Spectroscopy with VLT/CRIRES+ and Gemini-S/IGRINS
Phase-resolved high-resolution spectroscopy of CoRoT-2b measures sub-synchronous rotation at 2.6-sigma significance, consistent with its western hotspot offset.
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Escape of Water- and Metal-enriched Atmospheres from compact Hot mini-Neptunes with CHAIN
Water- and metal-rich atmospheres on compact hot mini-Neptunes lose mass more slowly than H/He cases at high enrichment levels due to enhanced cooling and higher mean molecular weight.
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Improving radial velocity precision with CARMENES-PLUS:An upgrade of the near-infrared spectrograph cooling system
The CARMENES-PLUS cooling system upgrade achieved 0.67 m/s intrinsic RV precision in the NIR channel, with nightly zero-point scatter reduced from 6.1 to 3.9 m/s and median stellar scatter from 8.8 to 6.7 m/s for slow rotators.