Results 101 to 110 of about 2,900,879 (209)

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

The 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, Hiroyuki Kurokawa, Laura Schaefer, Satoshi Okuzumi   +3 more
doaj   +1 more source

A Fast, Parallelized, GPU-accelerated Photochemical Model, XODIAC, with Built-in Equilibrium Chemistry and Multiple Chemical Networks for Exoplanetary Atmospheres

The Astrophysical Journal
The launch of the James Webb Space Telescope has delivered high-quality atmospheric observations and expanded the known chemical inventory of exoplanetary atmospheres, opening new avenues for atmospheric chemistry modeling to interpret these data.
Priyankush Ghosh, Sambit Mishra, Shubham Dey, Debayan Das, P. B. Rimmer, Liton Majumdar   +5 more
doaj   +1 more source

The mutual influence of disequilibrium composition and temperature in exoplanet atmospheres

Astronomy & Astrophysics
Astronomical observations have provided an extensive body of evidence for the existence of disequilibrium chemistry in many exoplanet atmospheres, and this departure from a chemical equilibrium composition may have an impact on the temperature of the atmosphere itself.
openaire   +4 more sources

Retrieval of atmospheric structure and composition of exoplanets from transit spectroscopy

, 2012
Recent spectroscopic observations of transiting exoplanets have permitted the derivation of the thermal structure and molecular abundances of H2O, CO, CO2, CH4, metallic oxides and alkali metals in these extreme atmospheres. Here, for the first time, a fully-fledged retrieval algorithm has been applied to exoplanet spectra to determine the thermal ...
openaire   +2 more sources

High-resolution measurements of atmospheric molecular hydrogen and its isotopic composition at the West African coast of Mauritania [PDF]

, 2013
Oceans are a net source of molecular hydrogen (H-2) to the atmosphere, where nitrogen (N-2) fixation is assumed to be the main biological production pathway followed by photochemical production from organic material.
Kock, A, Sub Atmospheric physics and chemistry, A. Kock, Walter, S., S. Walter, T. Röckmann, Afd Marine and Atmospheric Research, Marine and Atmospheric Research, Kock, Annette, Röckmann, T.   +9 more
core   +3 more sources

Seasonal Changes in the Atmosphere of HD 80606 b Observed with JWST’s NIRSpec/G395H

The Astronomical Journal
High-eccentricity gas giant planets serve as unique laboratories for studying the thermal and chemical properties of H/He-dominated atmospheres. One of the most extreme cases is HD 80606 b—a hot Jupiter orbiting a Sun-like star with an eccentricity of 0 ...
James T. Sikora, Jason F. Rowe, Jared Splinter, Saugata Barat, Lisa Dang, Nicolas B. Cowan, Thomas Barclay, Knicole D. Colón, Jean-Michel Désert, Stephen R. Kane, Joe Llama, Hinna Shivkumar, Keivan G. Stassun, Elisa V. Quintana   +13 more
doaj   +1 more source

Experimental and Numerical Constraints on the Masses and Compositions of Rocky Exoplanet Atmospheres

ISSN:0002 ...
Thompson, Margaret April; id_orcid0000-0002-6178-9055, Sossi, Paolo, Bower, Dan J.; id_orcid0000-0002-0673-4860, Shahar, Anat, Petitgirard, Sylvain, Tian, Meng   +5 more
openaire   +2 more sources

The NASA exoplanet archive: data and tools for exoplanet research

, 2013
We describe the contents and functionality of the NASA Exoplanet Archive, a database and toolset funded by NASA to support astronomers in the exoplanet community.
Rey, R., Harbut, M., Ali, B., Groom, S., Kane, S. R., Stauffer, J., McElroy, D. L., Chen, X., Leifer, S., Berukoff, S., Akeson, R. L., Jackson, E., Chan, B., Berriman, G. B., Wittman, M., Abajian, M., Plavchan, P., Saucedo, M., Crane, M., Lau, C., Bryden, G., Lynn, M., Wyatt, P., Papin, M., Beichman, C., Regelson, M., Schmitz, M., Good, J., Ramirez, S. V., Payne, A. N., Zhang, A., Ciardi, D., von Braun, K., Laity, A. C., Beekley, A.   +34 more
core   +1 more source

Characterization and migration of atmospheric REE in soils and surface waters [PDF]

, 2002
Rainwater and snow collected from three different sites in France (Vosges Mountains, French Alps and Strasbourg) show more or less similar shapes of their REE distribution patterns.
Aubert, Dominique, Stille, P., Gauthier-Lafaye, F., Aubert, D., Stille, Peter, Pourcelot, Laurent, Probst, Anne, Gauthier-Lafaye, François, Pourcelot, L., Del Nero, Mireille, del Nero, M.   +10 more
core   +1 more source

Volatile-bearing mineral atmospheres of hot rocky exoplanets as probes of interior state and composition

Astronomy & Astrophysics
Context . Spectra collected by the James Webb Space Telescope (JWST) hint at a volatile-rich and perhaps CO/CO 2 -bearing atmosphere on the hot rocky exoplanet (HRE) 55 Cancri e.
Fabian L. Seidler, Paolo A. Sossi, Dan J. Bower, Brice-Olivier Demory   +3 more
openaire   +2 more sources