Results 121 to 130 of about 740,794 (260)

A Radiative-convective Model for Terrestrial Planets with Self-consistent Patchy Clouds

The Planetary Science Journal, 2023
Clouds are ubiquitous: they arise for every solar system planet that possesses an atmosphere and have also been suggested as a leading mechanism for obscuring spectral features in exoplanet observations.
James D. Windsor, Tyler D. Robinson, Ravi kumar Kopparapu, Amber V. Young, David E. Trilling, Joe LLama   +5 more
doaj   +1 more source

Hot Exoplanet Atmospheres Resolved with Transit Spectroscopy (HEARTS) [PDF]

Astronomy & Astrophysics, 2019
High-resolution optical spectroscopy is a powerful tool to characterise exoplanetary atmospheres from the ground. The sodium D lines, with their large cross sections, are especially suited to studying the upper layers of atmospheres in this context.
J. Seidel, D. Ehrenreich, A. Wyttenbach, R. Allart, M. Lendl, L. Pino, V. Bourrier, H. Cegla, C. Lovis, D. Barrado, D. Bayliss, N. Astudillo-Defru, A. Deline, C. Fisher, K. Heng, R. Joseph, B. Lavie, C. Melo, F. Pepe, D. S'egrasan, S. Genève, Ch, L. Observatory, Leiden University, Nl, S. R. Institute, Austrian Academy of Sciences, At, A. S. M. F. Astronomy, U. Amsterdam, Cheops Fellow, Snsf NCCR-PlanetS, D. Astrof'isica, C. D. Astrobiolog'ia, ès, D. Physics, U. Warwick, UK., U. Concepci'on, D. D. Astronom'ia, Cl, Center for Space, Habitability, U. Bern, Laboratoire d'astrophysique, 'Ecole polytechnique f'ed'erale de Lausanne, E. Observatory   +46 more
semanticscholar   +1 more source

Asymmetry and Dynamical Constraints in Two-limbs Retrieval of WASP-39 b Inferring from JWST Data

The Astronomical Journal
Transmission spectroscopy has provided unprecedented insight into the makeup of exoplanet atmospheres. A transmission spectrum contains contributions from a planet’s morning and evening limbs, which can differ in temperature, composition, and aerosol ...
Zixin Chen, Jianghui Ji, Guo Chen, Fei Yan, Xianyu Tan   +4 more
doaj   +1 more source

A New Window into Escaping Exoplanet Atmospheres: 10830 Å Line of Helium [PDF]

, 2017
Observational evidence for escaping exoplanet atmospheres has been obtained for a few exoplanets to date. It comes from strong transit signals detected in the ultraviolet, most notably in the wings of the hydrogen Lyα (Lyα) line. However, the core of the
A. Oklopčić, C. Hirata
semanticscholar   +1 more source

VAPORIZATION OF THE EARTH: APPLICATION TO EXOPLANET ATMOSPHERES [PDF]

The Astrophysical Journal, 2012
Currently, there are about 3 dozen known super-Earth (M < 10 MEarth), of which 8 are transiting planets suitable for atmospheric follow-up observations. Some of the planets are exposed to extreme temperatures as they orbit close to their host stars, e.g., CoRot-7b, and all of these planets have equilibrium temperatures significantly hotter than the ...
Bruce Fegley, Katharina Lodders, Laura Schaefer   +2 more
openaire   +3 more sources

Detecting isotopologues in exoplanet atmospheres using ground-based high-dispersion spectroscopy [PDF]

Astronomy & Astrophysics, 2018
Context. The cross-correlation technique is a well-tested method for exoplanet characterization, having lead to the detection of various molecules, to constraints on atmospheric temperature profiles, wind speeds, and planetary spin rates.
P. Mollière, I. Snellen
semanticscholar   +1 more source

Exploring and Validating Exoplanet Atmospheric Retrievals with Solar System Analog Observations [PDF]

arXiv, 2022
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. Critically, and unlike true exoplanet observations, Solar System analog data benefit from available high-quality ground- or orbiter-derived "truth" constraints that enable ...
arxiv  

Modeling Atmospheric Lines by the Exoplanet Community (MALBEC) Version 1.0: A CUISINES Radiative Transfer Intercomparison Project

The Planetary Science Journal
Radiative transfer (RT) models are critical in the interpretation of exoplanetary spectra, in simulating exoplanet climates, and when designing the specifications of future flagship observatories.
Geronimo L. Villanueva, Thomas J. Fauchez, Vincent Kofman, Eleonora Alei, Elspeth K. H. Lee, Estelle Janin, Michael D. Himes, Jérémy Leconte, Michaela Leung, Sara Faggi, Mei Ting Mak, Denis E. Sergeev, Thea Kozakis, James Manners, Nathan Mayne, Edward W. Schwieterman, Alex R. Howe, Natasha Batalha   +17 more
doaj   +1 more source

Magnetic Scaling Laws for the Atmospheres of Hot Giant Exoplanets

, 2011
We present scaling laws for advection, radiation, magnetic drag and ohmic dissipation in the atmospheres of hot giant exoplanets. In the limit of weak thermal ionization, ohmic dissipation increases with the planetary equilibrium temperature (T_eq ...
Agol, Baraffe, Batygin, Batygin, Burrows, Burrows, Charbonneau, Cowan, Crossfield, Dobbs-Dixon, Fortney, Goody, Hansen, Knutson, Knutson, Kristen Menou, Laughlin, Lewis, Liu, Miller, Miller, Perna, Perna, Rauscher, Rauscher, Showman, Showman, Showman, Showman, Winn   +29 more
core   +1 more source

Constraining the Thickness of TRAPPIST-1 b’s Atmosphere from Its JWST Secondary Eclipse Observation at 15 μm

The Astrophysical Journal Letters, 2023
Recently, the first JWST measurement of thermal emission from a rocky exoplanet was reported. The inferred dayside brightness temperature of TRAPPIST-1 b at 15 μ m is consistent with the planet having no atmosphere and therefore no mechanism by which to ...
Jegug Ih, Eliza M.-R. Kempton, Emily A. Whittaker, Madeline Lessard   +3 more
doaj   +1 more source