Results 101 to 110 of about 8,850 (191)

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

Distinguishing Oceans of Water from Magma on Mini-Neptune K2-18b

The Astrophysical Journal Letters
Mildly irradiated mini-Neptunes have densities potentially consistent with them hosting substantial liquid-water oceans (“Hycean” planets). The presence of CO _2 and simultaneous absence of ammonia (NH _3 ) in their atmospheres has been proposed as a ...
Oliver Shorttle, Sean Jordan, Harrison Nicholls, Tim Lichtenberg, Dan J. Bower   +4 more
doaj   +1 more source

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

The Need for Laboratory Measurements and Ab Initio Studies to Aid Understanding of Exoplanetary Atmospheres

, 2019
We are now on a clear trajectory for improvements in exoplanet observations that will revolutionize our ability to characterize their atmospheric structure, composition, and circulation, from gas giants to rocky planets.
Airapetian, Vladimir, Alam, Munazza, Arney, Giada, Ascenzi, Daniela, Batalha, Natalie, Batalha, Natasha, Benilan, Yves, Blecic, Jasmina, Bott, Kimberly, Bouwman, Jordy, Close, Laird, Del Genio, Anthony D., Deming, Drake, Desert, Jean-Michel, Domagal-Goldman, Shawn, Dong, Chuanfei, Dressing, Courtney, Drouin, Brian, Fauchez, Thomas, Fleury, Benjamin, Fortney, Jonathan J., Freedman, Richard, Gao, Peter, Gavilan, Lisseth, Gharib-Nezhad, Ehsan, Gizis, John, Gordon, Iouli E., Goyal, Jayesh, Gronoff, Guillaume, Gudipati, Murthy, Haghighipour, Nader, Hargreaves, Robert J., Henderson, Bryana, Horst, Sarah, Hu, Renyu, Huang, Xinchuan, Iro, Nicolas, Irwin, Patrick, Jensen-Clem, Rebecca, Johnson, Alexandria V, Kane, Stephen, Kao, Der-you, Karman, Tijs, Kempton, Eliza, Kitiashvili, Irina, Kreidberg, Laura, Krissansen-Totton, Joshua, Lee, Timothy, Lee, Timothy J., Lewis, Nikole, Line, Mike, Linnartz, Harold, Lopez-Morales, Mercedes, Lothringer, Joshua, Louden, Tom, Lupu, Roxana, Lustig-Yaeger, Jacob, Lyons, Timothy, Madhusudhan, Nikku, Mancini, Luigi, Marley, Mark S., Milam, Stefanie, Molaverdikhani, Karan, Molliere, Paul, Moses, Julianne, Pierrehumbert, Raymond, Ramirez, Ramses M., Rieker, Gregory B., Robinson, Tyler, Robinson, Tyler D., Rogers, Leslie, Rugheimer, Sarah, Rustamkulov, Zafar, Salama, Farid, Savin, Daniel Wolf, Schwieterman, Edward, Shkolnik, Evgenya, Sousa-Silva, Clara, Stevenson, Kevin, Sung, Keeyoon, Swain, Mark, Taylor, Jake, Tennyson, Jonathan, Turbet, Martin, Venot, Olivia, Wordsworth, Robin, Yurchenko, Sergei N, Zellem, Robert   +87 more
core  

Characterizing Exoplanetary Atmospheres: New Views on Exoplanet Composition and Chemistry

To appear in the proceedings of the Pontifical Academy of Science workshop on The James Webb Space Telescope: from first light to new worldviews, Vatican City, 27-29 February ...
openaire   +2 more sources

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

Experimental investigation of the molecular composition of organic hazes in a water-rich exoplanet atmosphere

Transmission spectra have suggested that condensate clouds and/ or photochemical haze are present in the atmospheres of many temperate to warm exoplanets [1]. Aerosols can affect atmospheric composition directly through condensation and heterogeneous reactions, and indirectly by impacting the depth of penetration of photolyzing radiation, as well as ...
Vuitton, Véronique, Wolters, Cedric, Schmitz, Isabelle, He, Chao, Orthous-Daunay, Francois-Regis, Moran, Sarah, Afonso, Carlos, Horst, Sarah, Lewis, Nikole, Moses, Julianne   +9 more
openaire   +2 more sources

The Metallicity and Carbon-to-oxygen Ratio of the Ultrahot Jupiter WASP-76b from Gemini-S/IGRINS

The Astronomical Journal
Measurements of the carbon-to-oxygen (C/O) ratios of exoplanet atmospheres can reveal details about their formation and evolution. Recently, high-resolution cross-correlation analysis has emerged as a method of precisely constraining the C/O ratios of ...
Megan Weiner Mansfield, Michael R. Line, Joost P. Wardenier, Matteo Brogi, Jacob L. Bean, Hayley Beltz, Peter Smith, Joseph A. Zalesky, Natasha Batalha, Eliza M.-R. Kempton, Benjamin T. Montet, James E. Owen, Peter Plavchan, Emily Rauscher   +13 more
doaj   +1 more source

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  

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

The atmospheres of hot rocky exoplanets (HREs), should they persist, are products of interactions with underlying magma oceans. Spectra collected by the James Webb Space Telescope (JWST) hint at a CO/CO$_2$-rich atmosphere on the HRE 55 Cancri e, indicative of such a process.
Seidler, Fabian L., Sossi, Paolo A., Bower, Dan J., Demory, Brice-Olivier   +3 more
openaire   +2 more sources