Results 31 to 40 of about 811,285 (331)

Evaporation of planetary atmospheres due to XUV illumination by quasars [PDF]

open access: yesMonthly notices of the Royal Astronomical Society, 2017
Planetary atmospheres are subject to mass loss through a variety of mechanisms including irradiation by XUV photons from their host star. Here we explore the consequences of XUV irradiation by supermassive black holes as they grow by the accretion of gas
John C. Forbes, A. Loeb
semanticscholar   +1 more source

Atmospheric Escape Processes and Planetary Atmospheric Evolution [PDF]

open access: yesJournal of Geophysical Research: Space Physics, 2020
AbstractThe habitability of the surface of any planet is determined by a complex evolution of its interior, surface, and atmosphere. The electromagnetic and particle radiation of stars drive thermal, chemical, and physical alteration of planetary atmospheres, including escape.
Jared Bell   +23 more
openaire   +6 more sources

Exploring and Validating Exoplanet Atmospheric Retrievals with Solar System Analog Observations

open access: yesThe Planetary Science Journal, 2023
Solar system observations that serve as analogs for exoplanet remote sensing data can provide important opportunities to validate ideas and models related to exoplanet environments.
Tyler D. Robinson, Arnaud Salvador
doaj   +1 more source

Joint Application of Concentration and δ18O to Investigate the Global Atmospheric CO Budget

open access: yesAtmosphere, 2015
Most previous top-down global carbon monoxide (CO) budget estimates have used only concentration information and shown large differences in individual source estimates.
Keyhong Park   +3 more
doaj   +1 more source

Equatorial Waves and Superrotation in the Stratosphere of a Titan General Circulation Model

open access: yesThe Planetary Science Journal, 2023
We investigate the characteristics of equatorial waves associated with the maintenance of superrotation in the stratosphere of a Titan general circulation model.
Neil T. Lewis   +3 more
doaj   +1 more source

Nightside Ionospheric Structure and Composition on Mars Driven by Energetic Electron Precipitation

open access: yesThe Astrophysical Journal, 2023
Ionospheric chemistry plays an unexpectedly important role in the evolution of planetary habitability. This study is dedicated to a detailed modeling of the nightside Martian ionospheric structure and composition, a topic that has been poorly explored ...
Shiqi Wu   +6 more
doaj   +1 more source

Gravity Waves in Planetary Atmospheres: Their Effects and Parameterization in Global Circulation Models

open access: yesAtmosphere, 2019
The dynamical and thermodynamical importance of gravity waves was initially recognized in the atmosphere of Earth. Extensive studies over recent decades demonstrated that gravity waves exist in atmospheres of other planets, similarly play a significant ...
A. Medvedev, Erdal Yiğit
semanticscholar   +1 more source

Composition of early planetary atmospheres – I. Connecting disc astrochemistry to the formation of planetary atmospheres [PDF]

open access: yes, 2016
We present a model of the early chemical composition and elemental abundances of planetary atmospheres based on the cumulative gaseous chemical species that are accreted onto planets forming by core accretion from evolving protoplanetary disks.
A. Cridland, R. Pudritz, M. Alessi
semanticscholar   +1 more source

Ejected Particles after Impact Splash on Mars: Aggregates and Aerodynamics

open access: yesThe Planetary Science Journal, 2023
Our earlier laboratory measurements showed that low-velocity sand impacts release fine
T. Becker   +8 more
doaj   +1 more source

The Stellar Activity of TRAPPIST-1 and Consequences for the Planetary Atmospheres [PDF]

open access: yes, 2017
The signatures of planets hosted by M dwarfs are more readily detected with transit photometry and radial velocity methods than those of planets around larger stars.
R. Roettenbacher, S. Kane
semanticscholar   +1 more source

Home - About - Disclaimer - Privacy