Results 101 to 110 of about 1,923 (221)

Thermal structure of an exoplanet atmosphere from phase-resolved emission spectroscopy

open access: yes, 2017
Exoplanets that orbit close to their host stars are much more highly irradiated than their solar system counterparts. Understanding the thermal structures and appearances of these planets requires investigating how their atmospheres respond to such ...
Showman, A. P.   +15 more
core   +1 more source

General circulation modelling of close-in extrasolar giant planets

open access: yes, 2011
PhDA large fraction of the extrasolar planets detected so far are giant planets that have such short orbital periods (a few days) that they are thought to be tidally-synchronised with the host star. Such orbits lead to permanent day/night sides on the
Thrastarson, Heidar Thor
core  

Exoplanet atmospheres at high spectral resolution

open access: yes
The spectrum of an exoplanet reveals the physical, chemical, and biological processes that have shaped its history and govern its future. However, observations of exoplanet spectra are complicated by the overwhelming glare of their host stars.
Birkby, Jayne
core   +1 more source

Helium Depletion in Escaping Atmospheres of Sub-Neptunes: A Signature of Primary-to-secondary Transition

open access: yesThe Astrophysical Journal
Short-period sub-Neptunes are common in extrasolar systems. These sub-Neptunes are generally thought to have primary atmospheres of protoplanetary-disk gas origin.
Issei Kobayashi   +3 more
doaj   +1 more source

The need for laboratory work to aid in the understanding of exoplanetary atmospheres

open access: yes, 2016
Advancements in our understanding of exoplanetary atmospheres, from massive gas giants down to rocky worlds, depend on the constructive challenges between observations and models.
Wang, Sharon X.   +33 more
core  

From Underground Oceans to Continents: A Glimpse into the Water Inventory on Rocky Planets Using Host Star Abundances

open access: yesThe Astrophysical Journal
The amount of surface water is thought to be critical for a planet’s climate stability and thus habitability. However, the probability that a rocky planet may exhibit surface water at any point in its evolution is dependent on multiple factors, such as ...
Kiersten M. Boley   +4 more
doaj   +1 more source

Revealing Stellar Surface Structure Behind Transiting Exoplanets

open access: yes, 2018
During exoplanet transits, successive stellar surface portions become hidden and differential spectroscopy between various transit phases provide spectra of small surface segments temporarily hidden behind the planet. Line profile changes across the stellar disk offer diagnostics for hydrodynamic modeling, while exoplanet analyses require stellar ...
openaire   +2 more sources

Statistical Trends in JWST Transiting Exoplanet Atmospheres

open access: yes
Our brains are hardwired for pattern recognition as correlations are useful for predicting and understanding nature. As more exoplanet atmospheres are being characterized with JWST, we are starting to unveil their properties on a population level.
David K. Sing   +15 more
core   +1 more source

Effects of Planetary Parameters on Disequilibrium Chemistry in Irradiated Planetary Atmospheres: From Gas Giants to Sub-Neptunes

open access: yesThe Astrophysical Journal
A primary goal of characterizing exoplanet atmospheres is to constrain planetary bulk properties, such as their metallicity, C/O ratio, and intrinsic heat.
Sagnick Mukherjee   +4 more
doaj   +1 more source

A global map of the atmospheric circulation and thermal structure for an ultrahot exoplanet

open access: yes, 2017
WASP-121b is one of the standout exoplanets available for atmospheric characterization, both in transmission and emission, due to its large radius (1.8 Jupiter radii), high temperature ( 2700K), and bright host star (H=9.4mag).
Barstow, Joanna   +13 more
core  

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