Results 1 to 10 of about 193,103 (196)

Atmospheric Escape and the Evolution of Close-in Exoplanets [PDF]

Annual Review of Earth and Planetary Sciences, 2018
Exoplanets with substantial Hydrogen/Helium atmospheres have been discovered in abundance, many residing extremely close to their parent stars. The extreme irradiation levels these atmospheres experience causes them to undergo hydrodynamic atmospheric escape. Ongoing atmospheric escape has been observed to be occurring in a few nearby exoplanet systems
James E. Owen
arxiv   +10 more sources

The Atmospheric Evolution of Small, Close-In Exoplanets [PDF]

, 2022
Submitted in part fulfilment of the requirements for the degree of Doctor of Philosophy at Imperial College London, July 2022.
James G. Rogers
openalex   +5 more sources

Signatures of Atmospheric Mass Loss and Planet Migration in the Time Evolution of Short-period Transiting Exoplanets

The Astronomical Journal
Comparative studies of young and old exoplanet populations offer a glimpse into how planets may form and evolve with time. We present an occurrence rate study of short-period (
Rachel B. Fernandes, Galen J. Bergsten, Gijs D. Mulders, Ilaria Pascucci, Kevin K. Hardegree-Ullman, Steven Giacalone, Jessie L. Christiansen, James G. Rogers, Akash Gupta, Rebekah I. Dawson, Tommi T. Koskinen, Kiersten M. Boley, Jason L. Curtis, Katia Cunha, Eric E. Mamajek, Sabina Sagynbayeva, Sakhee S. Bhure, David R. Ciardi, Preethi R. Karpoor, Kyle A. Pearson, Jon K. Zink, Gregory A. Feiden   +21 more
doaj   +3 more sources

Stellar rotation and its connection to the evolution of hydrogen-dominated atmospheres of exoplanets [PDF]

Astronomische Nachrichten, 2021
The population of known low- to intermediate-mass exoplanets shows a large spread in densities, which is believed to be due to the diversity of planetary atmospheres and thus controlled by planetary atmospheric mass loss. One of the main drivers of long-term atmospheric escape is the absorption of high-energy XUV radiation from the host star.
Daria Kubyshkina, Daria Kubyshkina
arxiv   +6 more sources

The role of planetary interior in the long-term evolution of atmospheric CO₂on Earth-like exoplanets [PDF]

Astronomy & Astrophysics, 2021
Context.The long-term carbonate silicate cycle plays an important role in the evolution of Earth’s climate and, therefore, may also be an important mechanism in the evolution of the climates of Earth-like exoplanets. However, given the large diversity in the possible interiors for Earth-like exoplanets, the ensuing evolution of the atmospheric ...
Mark Oosterloo, Dennis Höning, I. Kamp, F. van der Tak   +3 more
openalex   +6 more sources

The Evolution of Atmospheric Escape of Highly Irradiated Gassy Exoplanets [PDF]

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 Allan, A. A. Vidotto, Leonardo A. Dos Santos   +2 more
openalex   +2 more sources

Haze Evolution in Temperate Exoplanet Atmospheres Through Surface Energy Measurements [PDF]

Nature Astronomy, 2021
Photochemical hazes are important opacity sources in temperate exoplanet atmospheres, hindering current observations from characterizing exoplanet atmospheric compositions. The haziness of an atmosphere is determined by the balance between haze production and removal.
Xinting Yu, Chao He, Xi Zhang, Sarah M. Hörst, Austin H. Dymont, Patricia McGuiggan, Julianne I. Moses, Nikole K. Lewis, Jonathan J. Fortney, Peter Gao, Eliza M.-R. Kempton, Sarah E. Moran, Caroline V. Morley, Diana Powell, Jeff A. Valenti, Véronique Vuitton   +15 more
arxiv   +11 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, Elena Gallo, Edmund Hodges‐Kluck, Fred C. Adams, Rory Barnes   +4 more
openalex   +8 more sources

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, Lisa Kaltenegger
openalex   +4 more sources

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.
D. Cunha, A. C. M. Correia, J. Laskar
openalex   +8 more sources