Results 141 to 150 of about 740,794 (260)

Exoplanetary Atmospheres - Chemistry, Formation Conditions, and Habitability [PDF]

, 2016
Characterizing the atmospheres of extrasolar planets is the new frontier in exoplanetary science. The last two decades of exoplanet discoveries have revealed that exoplanets are very common and extremely diverse in their orbital and bulk properties.
arxiv   +1 more source

Atmospheric Circulation of Exoplanets

, 2009
We survey the basic principles of atmospheric dynamics relevant to explaining existing and future observations of exoplanets, both gas giant and terrestrial. Given the paucity of data on exoplanet atmospheres, our approach is to emphasize fundamental principles and insights gained from Solar-System studies that are likely to be generalizable to ...
Showman, Adam P., Cho, James Y-K., Menou, Kristen   +2 more
openaire   +2 more sources

Statistical Trends in JWST Transiting Exoplanet Atmospheres

The Astrophysical Journal
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.
Guangwei Fu, Kevin B. Stevenson, David K. Sing, Sagnick Mukherjee, Luis Welbanks, Daniel Thorngren, Shang-Min Tsai, Peter Gao, Joshua Lothringer, Thomas G. Beatty, Cyril Gapp, Thomas M. Evans-Soma, Romain Allart, Stefan Pelletier, Pa Chia Thao, Andrew W. Mann   +15 more
doaj   +1 more source

POSEIDON: A Multidimensional Atmospheric Retrieval Code for Exoplanet Spectra [PDF]

Journal of Open Source Software (2023): 8(81), 4873
Spectroscopic observations of exoplanet atmospheres can reveal the chemical composition, temperature, cloud properties, and (potentially) the habitability of these distant worlds. The inference of such properties is generally enabled by Bayesian atmospheric retrieval algorithms.
arxiv   +1 more source

Life Beyond the Solar System: Space Weather and Its Impact on Habitable Worlds [PDF]

, 2018
The search of life in the Universe is a fundamental problem of astrobiology and a major priority for NASA. A key area of major progress since the NASA Astrobiology Strategy 2015 (NAS15) has been a shift from the exoplanet discovery phase to a phase of ...
Airapetian, V. S., Alexander, D., Cohen, O., Danchi, W. C., Dong, C. F., Fahrenbach, A., France, K., Funke, B., Glocer, A., Grenfell, J. L., Gronoff, G., Guedel, M., Hallinan, G., Henning, W. G., Jackman, C., Jin, M., Johnstone, C., Kay, C., Kobayashi, K., Kuang, W., Leisawitz, D., Lueftinger, T., Lynch, B., Maehara, H., Manchester, C., Mlynczak, M., Notsu, Y., Puertas, M. Lopez, Rugheimer, S., Sojka, J., Stamenkovic, V., Stevenson, K. B., van der Holst, B., Verkhoglyadova, O., Yamashiki, Y., Zank, G.   +35 more
core   +1 more source

Theoretical Transmission Spectra of Exoplanet Atmospheres with Hydrocarbon Haze: Effect of Creation, Growth, and Settling of Haze Particles. I. Model Description and First Results [PDF]

, 2017
Recently, properties of exoplanet atmospheres have been constrained via multi-wavelength transit observation, which measures an apparent decrease in stellar brightness during planetary transit in front of its host star (called transit depth).
Y. Kawashima, M. Ikoma
semanticscholar   +1 more source

On the protection of extrasolar Earth-like planets around K/M stars against galactic cosmic rays

, 2009
Previous studies have shown that extrasolar Earth-like planets in close-in habitable zones around M-stars are weakly protected against galactic cosmic rays (GCRs), leading to a strongly increased particle flux to the top of the planetary atmosphere.
A. Stadelmann, Beaulieu, Belisheva, Buccino, Correia, Crutzen, Fichtner, Fridlund, Goldreich, Grenfell, Grenfell, Grießmeier, Grießmeier, Grießmeier, H. Lammer, Haagen-Smit, Heath, Heber, Holzwarth, Hubbard, J.-M. Grießmeier, J.L. Grenfell, Joshi, Joshi, Kallenrode, Kasting, Khodachenko, Kuchner, Lammer, Lammer, Lestrade, Lovelock, Lovis, Léger, MacDonald, Mann, McDonald, Murray, Parker, Peale, Prölss, Reeves, Ribas, Rivera, Sagan, Scalo, Scherer, Schindler, Selsis, Selsis, Selsis, Seo, Shea, Smart, Smith, Tarter, U. Motschmann, Udry, Valencia, Valencia, Vogt, Voigt, Voigt, Wood, Wood   +64 more
core   +3 more sources

JWST/NIRISS Reveals the Water-rich “Steam World” Atmosphere of GJ 9827 d

The Astrophysical Journal Letters
With sizable volatile envelopes but smaller radii than the solar system ice giants, sub-Neptunes have been revealed as one of the most common types of planet in the galaxy. While the spectroscopic characterization of larger sub-Neptunes (2.5–4 R _⊕ ) has
Caroline Piaulet-Ghorayeb, Björn Benneke, Michael Radica, Eshan Raul, Louis-Philippe Coulombe, Eva-Maria Ahrer, Daria Kubyshkina, Ward S. Howard, Joshua Krissansen-Totton, Ryan J. MacDonald, Pierre-Alexis Roy, Amy Louca, Duncan Christie, Marylou Fournier-Tondreau, Romain Allart, Yamila Miguel, Hilke E. Schlichting, Luis Welbanks, Charles Cadieux, Caroline Dorn, Thomas M. Evans-Soma, Jonathan J. Fortney, Raymond Pierrehumbert, David Lafrenière, Lorena Acuña, Thaddeus Komacek, Hamish Innes, Thomas G. Beatty, Ryan Cloutier, René Doyon, Anna Gagnebin, Cyril Gapp, Heather A. Knutson   +32 more
doaj   +1 more source

Exoplanet Aeronomy: A Case Study of WASP-69 b’s Variable Thermosphere

The Astronomical Journal
Aeronomy, the study of Earth’s upper atmosphere and its interaction with the local space environment, has long traced changes in the thermospheres of Earth and other solar system planets to solar variability in the X-ray and extreme-ultraviolet ...
W. Garrett Levine, Shreyas Vissapragada, Adina D. Feinstein, George W. King, Aleck Hernandez, Lía Corrales, Michael Greklek-McKeon, Heather A. Knutson   +7 more
doaj   +1 more source

Modeling Noncondensing Compositional Convection for Applications to Super-Earth and Sub-Neptune Atmospheres

The Astrophysical Journal
Compositional convection is atmospheric mixing driven by density variations caused by compositional gradients. Previous studies have suggested that compositional gradients of atmospheric trace species within planetary atmospheres can impact convection ...
Namrah Habib, Raymond T. Pierrehumbert
doaj   +1 more source