Results 1 to 10 of about 1,575 (209)

Venus as an Exoplanet: Effect of varying stellar, orbital, planetary and atmospheric properties upon composition, habitability and detectability

The newly selected Venus missions EnVISION and VERITAS (Venus Emissivity, Radio Science, InSAR, Topography, and Spectroscopy) offer new opportunities for studying Venus but will also contribute to furthering our knowledge of Venus as an exoplanet.
Herbst, Konstantin Linus, Grenfell, John Lee, Rauer, Heike, Sinnhuber, Miriam, Helbert, Jörn, Arnold, Gabriele   +5 more
core   +4 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

A Metal-poor Atmosphere with a Hot Interior for a Young Sub-Neptune Progenitor: JWST/NIRSpec Transmission Spectrum of V1298 Tau b

The Astronomical Journal
We present the JWST/NIRSpec G395H transmission spectrum of the young (10–30 Myr) transiting planet V1298 Tau b (9.85 ± 0.35 R _⊕ , T _eq  = 670 K). Combined Hubble Space Telescope and JWST observations reveal a haze-free, H/He-dominated atmosphere with a
Saugata Barat, Jean-Michel Désert, Sagnick Mukherjee, Jayesh M. Goyal, Qiao Xue, Yui Kawashima, Allona Vazan, William Misener, Hilke E. Schlichting, Jonathan J. Fortney, Jacob L. Bean, Swaroop Avarsekar, Gregory W. Henry, Robin Baeyens, Michael R. Line, John H. Livingston, Trevor David, Erik A. Petigura, James T. Sikora, Hinna Shivkumar, Adina D. Feinstein, Antonija Oklopčić   +21 more
doaj   +1 more source

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

Atmospheric characterization of K2-18b [PDF]

openThis thesis investigates the atmosphere of K2-18b, a sub-Neptune exoplanet located in the habitable zone of an M-dwarf star. The study aims to characterize the chemical composition and the temperature-pressure (T-P) profile of the atmosphere to ...
MASCOLO, YLENIA
core  

A Machine Learning–ready Data Set for Exoplanet Atmospheric Retrieval

Atmospheric retrieval is a modeling technique used to determine a planet’s atmosphere’s temperature and composition from spectral data. The retrieved atmospheric composition can provide understanding into the surface fluxes of gaseous species necessary ...
Simone Zorzan, Mascaro, Massimo, Lund, Michael B., Domagal-Goldman, Shawn D., Shawn D. Domagal-Goldman, Atilim Güneş Baydin, Molly D. O’Beirne, Frank Soboczenski, van Eyken, Julian C., O’Beirne, Molly D., Michael B. Lund, Massimo Mascaro, Villanueva, Geronimo L., Arney, Giada N., Julian C. van Eyken, Giada N. Arney, Geronimo L. Villanueva, Baydin, Atilim Güneş, Zorzan, Simone, Soboczenski, Frank, Himes, Michael D., Michael D. Himes   +21 more
core   +1 more source

Atmospheres of brown dwarfs

, 2014
ChH highlights financial support of the European Community under the FP7 by an ERC starting grant. SLC acknowledges financial support of University of LeicesterBrown Dwarfs are the coolest class of stellar objects known to date. Our present perception is
Casewell, Sarah, Helling, Christiane
core   +1 more source

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
doaj   +1 more source

Clearing the Air: Solar System Bodies as Windows into the Impact of Aerosols on Exoplanet Atmospheric Retrievals

International audienceAs we enter the next chapter in our characterization of exoplanet atmospheres with state-of-the-art telescopes such as the James Webb Space Telescope, the efficacy of our atmospheric retrieval pipelines is more important than ever ...
Petzold, Guillaume, Robinson, Tyler, Montemessin, Franck, Robinthal, Lily, Koskinen, Tommi   +4 more
core   +1 more source

Atmospheric circulation and composition of GJ1214b

, 2011
The exoplanet GJ1214b presents an interesting example of compositional de-generacy for low-mass planets. Its atmosphere may be composed of water, super-solar or solar metallicity material.
Kristen Menou
core   +1 more source