Results 121 to 130 of about 6,856,607 (225)

Chemical modeling of exoplanet atmospheres

, 2014
International audienceThe past twenty years have revealed the diversity of planets that exist in the Universe. It turned out that most of exoplanets are different from the planets of our Solar System and thus, everything about them needs to be explored ...
O. Venot, Agúndez, M., Venot, O., M. Agúndez, Venot, Olivia, Agúndez, Marcelino   +5 more
core   +1 more source

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

The 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, Wendy R. Panero, Francesca Miozzi, Ashika Capirala, Johanna K. Teske   +4 more
doaj   +1 more source

Revisiting the Exo-Mercury Candidate GJ 367 b with ESPRESSO and a Self-consistent Tidal Distortion Model

The Astronomical Journal
We report revised mass and radius measurements for GJ 367 b, an ultra-short-period (7.7 hr) sub-Earth in a multiplanet system orbiting a nearby (∼9 pc) M dwarf host.
Rena A. Lee, Fei Dai, Ellen M. Price, Te Han, Davide Gandolfi, Mathias Zechmeister, Gumundur Stefánsson, Jiayin Dong, Simon H. Albrecht, Kristine W. F. Lam, Federica Chiti, Jennifer L. van Saders, Daniel Huber, Heather A. Knutson, Karen A. Collins, Michael Zhang, Leslie A. Rogers, Eleonora Armano, Casey L. Brinkman, Nicholas Saunders, Daniel Hey   +20 more
doaj   +1 more source

Early Time Small-scale Structures in Hot Exoplanet Atmosphere Simulations

The Astrophysical Journal
Abstract We report on the critical influence of small-scale flow structures (e.g., fronts, vortices, and waves) that immediately arise in hot exoplanet atmosphere simulations initialized with a resting state. A hot, 1:1 spin–orbit synchronized Jupiter is used here as a clear example; but, the phenomenon is generic and important for any ...
J. W. Skinner, J. Y-K. Cho
openaire   +3 more sources

Metal Oxide Clusters in Gas-giant Exoplanet Atmospheres

The Astrophysical Journal
This study investigates the thermal stability and absorption of metal oxide clusters in exoplanetary atmospheres. Utilizing our thermochemical data, we analyze eight distinct cluster families: magnesium oxide (MgO), silicon monoxide (SiO), titanium ...
Deepak Bisht, Christiane Helling, David Gobrecht, Ludmila Carone, Helena Lecoq-Molinos, Peter Woitke, Markus Aichhorn, Jan Philip Sindel, Amit Reza   +8 more
doaj   +1 more source

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

The 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, Jonathan J. Fortney, Nicholas F. Wogan, David K. Sing, Kazumasa Ohno   +4 more
doaj   +1 more source

Precise Constraints on the Energy Budget of WASP-121 b from Its JWST NIRISS/SOSS Phase Curve

The Astronomical Journal
Ultra-hot Jupiters exhibit day-to-night temperature contrasts upwards of 1000 K due to competing effects of strong winds, short radiative timescales, magnetic drag, and H _2 dissociation/recombination. Spectroscopic phase curves provide critical insights
Jared Splinter, Louis-Philippe Coulombe, Robert C. Frazier, Nicolas B. Cowan, Emily Rauscher, Lisa Dang, Michael Radica, Sean Collins, Stefan Pelletier, Romain Allart, Ryan J. MacDonald, David Lafrenière, Loïc Albert, Björn Benneke, René Doyon, Ray Jayawardhana, Doug Johnstone, Vigneshwaran Krishnamurthy, Caroline Piaulet-Ghorayeb, Lisa Kaltenegger, Michael R. Meyer, Jake Taylor, Jake D. Turner   +22 more
doaj   +1 more source

A Metal-poor Atmosphere with a Hot Interior for a Young Sub-Neptune Progenitor: JWST/NIRSpec Transmission Spectrum of V1298 Tau b

The Astronomical Journal
We present the JWST/NIRSpec G395H transmission spectrum of the young (10–30 Myr) transiting planet V1298 Tau b (9.85 ± 0.35 R _⊕ , T _eq  = 670 K). Combined Hubble Space Telescope and JWST observations reveal a haze-free, H/He-dominated atmosphere with a
Saugata Barat, Jean-Michel Désert, Sagnick Mukherjee, Jayesh M. Goyal, Qiao Xue, Yui Kawashima, Allona Vazan, William Misener, Hilke E. Schlichting, Jonathan J. Fortney, Jacob L. Bean, Swaroop Avarsekar, Gregory W. Henry, Robin Baeyens, Michael R. Line, John H. Livingston, Trevor David, Erik A. Petigura, James T. Sikora, Hinna Shivkumar, Adina D. Feinstein, Antonija Oklopčić   +21 more
doaj   +1 more source

How to Size an Exoplanet? A Model Approach for Visualization

, 2013
The realization and experiences with a physical exoplanet model in the education and outreach are described. During the tests with students in the classroom and adults at public demonstrations, the following conclusions were drawn: in the visualization ...
Kereszturi, Akos
core  

Lightning activity on a tidally locked terrestrial exoplanet in storm-resolving simulations for a range of surface pressures

Cloudy atmospheres produce electric discharges, including lightning. Lightning, in turn, provides sufficient energy to break down air molecules into reactive species and thereby affects the atmospheric composition.
Braam, Marrick, Sergeev, Denis E, McDermott, James W, Eager-Nash, Jake K, Woods, Lottie, Boutle, Ian A   +5 more
core   +1 more source