Results 31 to 40 of about 3,181,123 (208)

Spin evolution of Earth-sized exoplanets, including atmospheric tides and core–mantle friction [PDF]

open access: yesInternational Journal of Astrobiology, 2014
AbstractPlanets with masses between 0.1 and 10 M⊕are believed to host dense atmospheres. These atmospheres can play an important role on the planet's spin evolution, since thermal atmospheric tides, driven by the host star, may counterbalance gravitational tides. In this work, we study the long-term spin evolution of Earth-sized exoplanets.
Cunha, Diana   +2 more
openaire   +4 more sources

A new set of atmosphere and evolution models for cool T–Y brown dwarfs and giant exoplanets [PDF]

open access: yesAstronomy & Astrophysics, 2020
We present a new set of solar metallicity atmosphere and evolutionary models for very cool brown dwarfs and self-luminous giant exoplanets, which we term ATMO 2020. Atmosphere models are generated with our state-of-the-art 1D radiative-convective equilibrium code ATMO, and are used as surface boundary conditions to calculate the interior structure and ...
M. W. Phillips   +8 more
openaire   +4 more sources

Exoplanet Atmospheres [PDF]

open access: yes, 2010
At the dawn of the first discovery of exoplanets orbiting Sun-like stars in the mid-1990s, few believed that observations of exoplanet atmospheres would ever be possible.
Sara Seager   +3 more
core   +1 more source

Towards a Theory for the Atmospheres, Structure, and Evolution of Giant Exoplanets [PDF]

open access: yesProceedings of the International Astronomical Union, 2011
AbstractIn this short review, I summarize some of the salient features of the emerging theory of exoplanets in general, and of giant exoplanets in particular. A focus is on the characterization of transiting planets at primary and secondary eclipse, but various other related topics are covered, if only briefly.
openaire   +1 more source

Disk evolution, element abundances and cloud properties of young gas giant planets [PDF]

open access: yes, 2014
ChHc and PBR highlights financial support of the European Community under the FP7 program by an ERC starting grant. PW, IK, and WFT acknowledge funding from the European Union Seventh Framework Programme FP7-2011 under grant agreement No.
Kamp, I.   +19 more
core   +2 more sources

Multiepoch Detections of the Extended Atmosphere and Transmission Spectra of KELT-9b with a 1.5 m Telescope

open access: yesThe 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
doaj   +1 more source

A Coupled Analysis of Atmospheric Mass Loss and Tidal Evolution in XUV Irradiated Exoplanets: The TRAPPIST-1 Case Study [PDF]

open access: yesThe 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

EUV influences on exoplanet atmospheric stability and evolution

open access: yes, 2019
Science white paper submitted to the Astro2020 Decadal Survey.
Youngblood, Allison   +17 more
openaire   +2 more sources

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]

open access: yes, 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

Nonthermal Atmospheric Escape on the Kepler-11 “Super-Earths” Driven by Stellar Wind Sputtering

open access: yesThe Astrophysical Journal, 2023
Jeans escape or hydrodynamic escape is believed to dominate atmospheric loss for hot Jupiters. However, nonthermal mechanisms likely contribute substantially on hydrogen-rich “super-Earths” with relatively cold and extended atmospheres.
Hao Gu   +4 more
doaj   +1 more source

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