Results 11 to 20 of about 8,935 (84)
On the relative importance of AGN winds for the evolution of exoplanet atmospheres
Monthly Notices of the Royal Astronomical Society, 2022 ABSTRACT Recent work investigating the impact of winds and outflows from active galactic nuclei (AGNs) on the habitability of exoplanets suggests that such activity could be deleterious for the long-term survival of planetary atmospheres and the habitability of planets subject to such winds.
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Spectral Evolution of an Earth-Like Planet [PDF]
, 2006 We have developed a characterization of the geological evolution of the Earths atmosphere and surface in order to model the observable spectra of an Earth-like planet through its geological history.
Cloud P. E. +4 more
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Spin evolution of Earth-sized exoplanets, including atmospheric tides and core–mantle friction [PDF]
International 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
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Spectral evolution of gaseous exoplanet atmospheres due to hydrodynamic escape
, 2023 The evolution of stars on grand time-scales affect their surroundings in many ways. Due to their intrinsic rotation, causing strong magnetic activity, they vary greatly in radiative activity in X-ray and ultraviolet (XUV) throughout their lifetime. Planets orbiting these stars close-in could, consequently, be affected by these drastic radiative changes.
Amy Louca, Yamila Miguel
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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
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Climate Modeling of a Potential ExoVenus [PDF]
, 2018 The planetary mass and radius sensitivity of exoplanet discovery capabilities has reached into the terrestrial regime. The focus of such investigations is to search within the Habitable Zone where a modern Earth-like atmosphere may be a viable comparison.
Ceja, Alma Y. +3 more
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The Evolution of Atmospheric Escape of Highly Irradiated Gassy Exoplanets
Proceedings of the International Astronomical Union, 2021 AbstractAtmospheric escape has traditionally been observed using hydrogen Lyman-α transits, but more recent detections utilise the metastable helium triplet lines at 1083nm. Capable of being observed from the ground, this helium signature offers new possibilities for studying atmospheric escape.
Andrew P. Allan +2 more
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Atmospheric mass-loss and evolution of short-period exoplanets: the examples of CoRoT-7b and Kepler-10b [PDF]
Monthly Notices of the Royal Astronomical Society, 2013 Short-period exoplanets potentially lose envelope masses during their evolution because of atmospheric escape caused by the intense XUV radiation from their host stars. We develop a combined model of atmospheric mass loss calculation and thermal evolution calculation of a planet to simulate its evolution and explore the dependences on the formation ...
Hiroyuki Kurokawa +4 more
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The Atmospheric Evolution of Small, Close-In Exoplanets
, 2022 Submitted in part fulfilment of the requirements for the degree of Doctor of Philosophy at Imperial College London, July 2022.
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Towards a Theory for the Atmospheres, Structure, and Evolution of Giant Exoplanets [PDF]
Proceedings 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.
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