Results 41 to 50 of about 7,457,455 (185)

Nitrogen as a Tracer of Giant Planet Formation. I. A Universal Deep Adiabatic Profile and Semianalytical Predictions of Disequilibrium Ammonia Abundances in Warm Exoplanetary Atmospheres

The Astrophysical Journal, 2023
A major motivation of spectroscopic observations of giant exoplanets is to unveil planet formation processes from atmospheric compositions. Several recent studies suggested that atmospheric nitrogen, like carbon and oxygen, can provide important ...
Kazumasa Ohno, Jonathan J. Fortney
doaj   +1 more source

Exoplanet Atmospheric Studies At High Spectral Resolution

, 2020
The study of exoplanet atmospheres is essential to understand the formation, evolution and composition of exoplanets. When a planet pass between its host star and an observer, a fraction of the star-light is absorbed by its atmosphere, thus revealing its
Allart, Romain
core   +1 more source

Direct Evidence of Photochemistry in an Exoplanet Atmosphere

, 2022
Photochemistry is a fundamental process of planetary atmospheres that is integral to habitability, atmospheric composition and stability, and aerosol formation. However, no unambiguous photochemical products have been detected in exoplanet atmospheres to
Aggarwal, Keshav, Cubillos, Patricio E., Line, Michael, Bean, Jacob L., Visscher, Channon, Alderson, Lili, Redfield, Seth, Gao, Peter, Baeyens, Robin, Crouzet, Nicolas, Behr, Patrick, Crossfield, Ian J. M., Schlawin, Everett, Lothringer, Joshua D., Grant, David, Fortney, Jonathan J., Hu, Renyu, Lopez-Morales, Mercedes, Yang, Jeehyun, France, Kevin, Daylan, Tansu, Bierson, Carver J., Wakeford, Hannah R, Tsai, Shang-Min, Powell, Diana, Carter, Aarynn L., Carone, Ludmila, Molaverdikhani, Karan, Yurchenko, Sergei N., Youngblood, Allison, Venot, Olivia, Kreidberg, Laura, Kirk, James, Brady, Ryan P., Moran, Sarah E., Berta-Thompson, Zachory K., Henning, Thomas, Taylor, Jake, Louca, Amy, Lendl, Monika, Decin, Leen, Moses, Julianne, Rustamkulov, Zafar, Wallack, Nicole L., Désert, Jean-Michel, Goyal, Jayesh M, Blecic, Jasmina, Mansfield, Megan, Miguel, Yamila, Welbanks, Luis, Batalha, Natalie M., Inglis, Julie, Mikal-Evans, Thomas, Wheatley, Peter J., Mukherjee, Sagnick, Batalha, Natasha E., Heng, Kevin, Leconte, Jérémy, Ohno, Kazumasa, Tremblin, Pascal, Rackham, Benjamin V., Krick, Jessica, Ahrer, Eva-Maria, Parmentier, Vivien, Jordan, Sean, Shorttle, Oliver, Barat, Saugata, Gibson, Neale P., Lee, Elspeth, Zhang, Xi, Harrington, Joseph, Mayne, N. J., Nasedkin, Evert, Alam, Munazza K., Palle, Enric, Borro, Miguel de Val, Casewell, S. L., Sing, David K., Stevenson, Kevin B., Feinstein, Adina D., Hébrard, Eric, Benneke, Björn, Kempton, Eliza M. -R., Lagage, Pierre-Olivier, Chubb, Katy L.   +84 more
core   +1 more source

Atmospheric C/O Ratios of Sub-Neptunes with Magma Oceans: Homemade rather than Inherited

The Astrophysical Journal Letters
Recently, the James Webb Space Telescope has enabled detailed spectroscopic characterization of sub-Neptune atmospheres. With detections of carbon- and oxygen-bearing species such as CO, CO _2 , CH _4 , and H _2 O, a central question is whether the ...
Aaron Werlen, Caroline Dorn, Hilke E. Schlichting, Simon L. Grimm, Edward D. Young   +4 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

dfm/exoplanet: exoplanet v0.1.0

, 2018
<p>The first public release of exoplanet.</p ...
Dan Foreman-Mackey, Geert Barentsen
core   +1 more source

Sub-Neptunes Are Drier than They Seem: Rethinking the Origins of Water-rich Worlds

The Astrophysical Journal Letters
Recent claims of biosignature gases in sub-Neptune atmospheres have renewed interest in water-rich sub-Neptunes with surface oceans, often referred to as Hycean planets. These planets are hypothesized to form beyond the snow line, accreting large amounts
Aaron Werlen, Caroline Dorn, Remo Burn, Hilke E. Schlichting, Simon L. Grimm, Edward D. Young   +5 more
doaj   +1 more source

The Effects of Non-ideal Mixing in Planetary Magma Oceans and Atmospheres

The Astrophysical Journal
Sub-Neptunes with hydrogen-rich envelopes are expected to sustain long-lived magma oceans that continuously exchange volatiles with their overlying atmospheres.
Aaron Werlen, Edward D. Young, Hilke E. Schlichting, Caroline Dorn, Anat Shahar   +4 more
doaj   +1 more source

Inverse modeling of European CH4 emissions: sensitivity to the observational network [PDF]

, 2009
Inverse modeling is widely employed to provide “top-down” emission estimates using atmospheric measurements. Here, we analyze the dependence of derived CH4 emissions on the sampling frequency and density of the observational surface network, using the ...
Bergamaschi, P., Villani, M.G., Sub Atmospheric physics and chemistry, Krol, M., Krol, M.C., Dep Natuurkunde, Dentener, F., Villani, M. G., Marine and Atmospheric Research, Meirink, J.F.   +9 more
core   +2 more sources

Thermoelastic Contraction as a Suppressor of Atmospheric Escape in Close-in Exoplanets

The Astrophysical Journal
The survival of volatile-rich atmospheres on close-in exoplanets challenges classical escape models. We identify a fully classical, interior-driven correction: thermoelastic contraction of the planetary mantle slightly increases the gravitational binding
L. Yıldız, D. Kaykı, E. Güdekli
doaj   +1 more source