Results 21 to 30 of about 9,564 (167)

Nitrogen as a Tracer of Giant Planet Formation. I. A Universal Deep Adiabatic Profile and Semianalytical Predictions of Disequilibrium Ammonia Abundances in Warm Exoplanetary Atmospheres

open access: yesThe Astrophysical Journal, 2023
A major motivation of spectroscopic observations of giant exoplanets is to unveil planet formation processes from atmospheric compositions. Several recent studies suggested that atmospheric nitrogen, like carbon and oxygen, can provide important ...
Kazumasa Ohno, Jonathan J. Fortney
doaj   +1 more source

EXONEST: The Bayesian Exoplanetary Explorer [PDF]

open access: yes, 2017
The fields of astronomy and astrophysics are currently engaged in an unprecedented era of discovery as recent missions have revealed thousands of exoplanets orbiting other stars.
Angerhausen, Daniel   +6 more
core   +4 more sources

Spectral Evolution of an Earth-Like Planet [PDF]

open access: yes, 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
core   +2 more sources

The Inhomogeneity Effect. III. Weather Impacts on the Heat Flow of Hot Jupiters

open access: yesThe Astrophysical Journal, 2023
The interior flux of a giant planet impacts atmospheric motion, and the atmosphere dictates the interior’s cooling. Here we use a non-hydrostatic general circulation model (Simulating Non-hydrostatic Atmospheres on Planets) coupled with a multi-stream ...
Xi Zhang   +3 more
doaj   +1 more source

A Multiple Scattering Polarized Radiative Transfer Model: Application to HD 189733b [PDF]

open access: yes, 2015
We present a multiple scattering vector radiative transfer model which produces disk integrated, full phase polarized light curves for reflected light from an exoplanetary atmosphere.
Kopparla, Pushkar   +5 more
core   +2 more sources

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

Colorado Ultraviolet Transit Experiment Data Simulator [PDF]

open access: yes, 2019
The Colorado Ultraviolet Transit Experiment (CUTE) is a 6U NASA CubeSat carrying on-board a low-resolution (R~2000--3000), near-ultraviolet (2500--3300 {\AA}) spectrograph. It has a rectangular primary Cassegrain telescope to maximize the collecting area.
Egan, Arika   +7 more
core   +2 more sources

Vertical structure of an exoplanet’s atmospheric jet stream

open access: yesNature
Ultra-hot Jupiters, an extreme class of planets not found in our solar system, provide a unique window into atmospheric processes. The extreme temperature contrasts between their day- and night-sides pose a fundamental climate puzzle: how is energy distributed?
Julia V. Seidel   +23 more
openaire   +3 more sources

Nitrogen as a Tracer of Giant Planet Formation. II. Comprehensive Study of Nitrogen Photochemistry and Implications for Observing NH3 and HCN in Transmission and Emission Spectra

open access: yesThe Astrophysical Journal, 2023
Atmospheric nitrogen may provide important constraints on giant planet formation. Following our semianalytical work, we further pursue the relation between observable NH _3 and an atmosphere’s bulk nitrogen abundance by applying the photochemical ...
Kazumasa Ohno, Jonathan J. Fortney
doaj   +1 more source

Gliese 581g as a scaled-up version of Earth: atmospheric circulation simulations

open access: yes, 2011
We use three-dimensional simulations to study the atmospheric circulation on the first Earth-sized exoplanet discovered in the habitable zone of an M star.
Anderson   +48 more
core   +1 more source

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