Results 71 to 80 of about 757 (177)

Bistability, Oscillations, and Multistability on Hycean Planets

The Astrophysical Journal
Hycean planets are hypothetical exoplanets characterized by H _2 O oceans and H _2 -rich atmospheres. These planets are high-priority targets for biosignature searches, as they combine abundant surface liquid water with easy-to-characterize H _2 -rich ...
Yichen Gao, Daniel D. B. Koll, Feng Ding
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
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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
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The JWST Rocky Worlds DDT Program Reveals GJ 3929b to Likely Be a Bare Rock

The Astrophysical Journal Letters
We report first results from the JWST Rocky Worlds Director’s Discretionary Time program. Two secondary eclipses of the terrestrial exoplanet GJ 3929b were recently observed using MIRI photometric imaging at 15 μ m.
Qiao Xue, Michael Zhang, Brandon Park Coy, Madison Brady, Xuan Ji, Jacob L. Bean, Michael Radica, Andreas Seifahrt, Julian Stürmer, Rafael Luque, Ritvik Basant, Nina Brown, Tanya Das, David Kasper, Caroline Piaulet-Ghorayeb, Eliza M.-R. Kempton, Edwin Kite   +16 more
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Sulfur Dioxide and Other Molecular Species in the Atmosphere of the Sub-Neptune GJ 3470 b

The Astrophysical Journal Letters
We report observations of the atmospheric transmission spectrum of the sub-Neptune exoplanet GJ 3470 b taken using the Near-Infrared Camera on JWST.
Thomas G. Beatty, Luis Welbanks, Everett Schlawin, Taylor J. Bell, Michael R. Line, Matthew Murphy, Isaac Edelman, Thomas P. Greene, Jonathan J. Fortney, Gregory W. Henry, Sagnick Mukherjee, Kazumasa Ohno, Vivien Parmentier, Emily Rauscher, Lindsey S. Wiser, Anastasia Triantafillides   +15 more
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Irradiated Atmospheres. IV. Effect of Mixing Heat Flux on Chemistry

The Astrophysical Journal
Vertical mixing disrupts the thermochemical equilibrium and introduces additional heat flux that alters exoplanetary atmospheric temperatures. We investigate how this mixing-induced heat flux affects atmospheric chemistry.
Zhen-Tai Zhang, Wei Zhong, Wei Wang, Jianheng Guo, Xianyu Tan, Bo Ma, Ruyi Wei, Cong Yu   +7 more
doaj   +1 more source

Unraveling the Mystery of the Peculiar and Young Hot Jupiter CoRoT-2b. I. H2O and CO Detection from Dayside Observations with Gemini-S/IGRINS

The Astronomical Journal
We present ground-based high-resolution spectroscopic pre-eclipse observations of the hot Jupiter CoRoT-2b obtained with the IGRINS spectrograph on Gemini South.
Ying Shu, Lisa Dang, Antoine Darveau-Bernier, Aurora Kesseli, Luc Bazinet, Justin Lipper, Stefan Pelletier, Romain Allart, Nicolas B. Cowan, David Lafreniére, Emily Rauscher, Alejandro Sánchez-López, Björn Benneke, Anne Boucher, René Doyon   +14 more
doaj   +1 more source

Atmospheric Composition Retrieval from Transit Spectra of Terrestrial Exoplanets: A Feasibility Study using Earth Observations [PDF]

, 2017
For an assessment of the detectability of molecular concentrations from transit spectra of Earth-like exoplanets, occultation spectra observed by an operational Earth observation satellite mission have been modeled with a line-by-line infrared radiative transfer code (Schreier et al. 2014).
Städt, Steffen, Schreier, Franz, Godolt, Mareike   +2 more
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The composition and dynamics of exoplanet atmospheres. [PDF]

The study of exoplanets has rapidly developed in the last twenty years, and the detailed characterization of planetary atmospheres has become a key area of research.\ud \ud For transiting planets around bright stars, atmospheric features can be detected with transmission spectroscopy.
openaire  

Early Accretion of Large Amounts of Solids for Directly Imaged Exoplanets

The Astrophysical Journal
As the number of planetary-mass objects (PMOs; ⪅13 M _Jupiter ) at wider separation (⪆10 au) grows, there is emerging evidence that they form differently from their higher-mass brown dwarf counterparts.
Ji Wang
doaj   +1 more source