Scaling K2. VII. Evidence For a High Occurrence Rate of Hot Sub-Neptunes at Intermediate Ages
The Astronomical Journal, 2023 The NASA K2 mission obtained high-precision time-series photometry for four young clusters, including the near-twin 600–800 Myr old Praesepe and Hyades clusters. Hot sub-Neptunes are highly prone to mass-loss mechanisms, given their proximity to the host
Jessie L. Christiansen +8 more
doaj +1 more source
Deuterium Escape on Photoevaporating Sub-Neptunes
The Astrophysical Journal Letters, 2023 We investigate the evolution of the deuterium-to-hydrogen (D/H) mass ratio driven by EUV photoevaporation of hydrogen-rich atmospheres of close-in sub-Neptunes around solar-type stars.
Pin-Gao Gu, Howard Chen
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Life at the end of worlds : modelling the biosignatures of microbial life in diverse environments at the end of the habitable lifetimes of Earth-like planets [PDF]
, 2014 This thesis investigates how increased global mean temperatures on Earth, induced by the increase in the luminosity of the Sun as it ages, change the types of habitable environments on the planet at local scales over the next 3 Gyr.
O'Malley-James, Jack T.
core +2 more sources
The Astronomical Journal, 2023 Irradiated Jovian atmospheres are complex and dynamic and can undergo temporal variations due to the close proximity of their parent stars. Of the Jovian planets that have been cataloged to date, KELT-9b is the hottest gas giant known, with an ...
Nataliea Lowson +12 more
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EUV influences on exoplanet atmospheric stability and evolution
, 2019 Science white paper submitted to the Astro2020 Decadal Survey.
Youngblood, Allison +17 more
openaire +2 more sources
A Coupled Analysis of Atmospheric Mass Loss and Tidal Evolution in XUV Irradiated Exoplanets: The TRAPPIST-1 Case Study [PDF]
The Astronomical Journal, 2020 Abstract Exoplanets residing close to their stars can experience evolution of both their physical structures and their orbits due to the influence of their host stars. In this work, we present a coupled analysis of dynamical tidal dissipation and atmospheric mass loss for exoplanets in X-ray and ultraviolet (XUV) irradiated environments.
Juliette Becker +4 more
openaire +3 more sources
How uncertainties on stellar atmospheric parameters impact exoplanet studies? [PDF]
, 2017 Exoplanet properties depend on how well the host star is characterized. For instance, the stellar atmospheric parameters (i.e., effective temperature, surface gravity and overall metallicity) are needed to derive the stellar mass and radius by using ...
Blanco-Cuaresma, Sergi
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, 2021 Context. Planetary atmospheric evolution modelling is a prime tool for understanding the observed exoplanet population and constraining formation and migration mechanisms, but it can also be used to study the evolution of the activity level of planet ...
P. E. Cubillos +3 more
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Fleeting but Not Forgotten: The Imprint of Escaping Hydrogen Atmospheres on Super-Earth Interiors
The Astrophysical JournalSmall, close-in exoplanets are divided into two subpopulations: super-Earths and sub-Neptunes. Most super-Earths are thought to have lost their primordially accreted hydrogen-dominated atmospheres via thermally driven winds.
James G. Rogers +2 more
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Correlations between the stellar, planetary, and debris components of exoplanet systems observed by Herschel [PDF]
, 2014 J.P.M., C.E., J.M. and B.M. are partially supported by Spanish grant AYA 2011-26202. This work was supported by the European Union through ERC grant number no.
Lestrade, J.-F. +85 more
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