Results 81 to 90 of about 9,564 (167)

Exploring atmospheres of hot mini-Neptunes and extrasolar giant planets orbiting different stars with application to HD 97658b, WASP-12b, CoRoT-2b, XO-1b and HD 189733b

, 2013
We calculated an atmospheric grid for hot mini-Neptune and giant exoplanets, that links astrophysical observable parameters- orbital distance and stellar type- with the chemical atmospheric species expected.
Kaltenegger, Lisa, Miguel, Yamila
core   +1 more source

The O2 A-band in fluxes and polarization of starlight reflected by Earth-like exoplanets

, 2017
Earth-like, potentially habitable exoplanets are prime targets in the search for extraterrestrial life. Information about their atmosphere and surface can be derived by analyzing light of the parent star reflected by the planet.
Fauchez, Thomas, Rossi, Loic, Stam, Daphne M.   +2 more
core   +1 more source

The Spin Zone: Synchronously and Asynchronously Rotating Land Planets Have Spectral Differences in Transmission

The Planetary Science Journal
New observational facilities are beginning to enable insights into the three-dimensional (3D) nature of exoplanets. Transmission spectroscopy is the most widely used method for characterizing transiting temperate exoplanet atmospheres, but because it ...
Nicholas Scarsdale, C. E. Harman, Thomas J. Fauchez   +2 more
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  

Blowin’ in the Nonisothermal Wind: Core-powered Mass Loss with Hydrodynamic Radiative Transfer

The Astrophysical Journal
The mass loss rates of planets undergoing core-powered escape are usually modeled using an isothermal Parker-type wind at the equilibrium temperature, T _eq .
William Misener, Matthäus Schulik, Hilke E. Schlichting, James E. Owen   +3 more
doaj   +1 more source

Astro2020 Science White Paper: Toward Finding Earth 2.0: Masses and Orbits of Small Planets with Extreme Radial Velocity Precision [PDF]

, 2019
Having discovered that Earth-sized planets are common, we are now embarking on a journey to determine if Earth-like planets are also common. Finding Earth-like planets is one of the most compelling endeavors of the 21st century - leading us toward ...
Bean, Jacob, Burt, Jennifer, Ciardi, David R., Dragomir, Diana, Gaidos, Eric, Johnson, Marshall C., Kempton, Eliza, Konopacky, Quinn, Meyer, Michael, Teske, Johanna, Weiss, Lauren, Zhou, George   +11 more
core   +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

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

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

A Multispecies Atmospheric Escape Model with Excited Hydrogen and Helium: Application to HD209458b

The Astrophysical Journal
Atmospheric escape shapes exoplanet evolution and star–planet interactions, with He I 10830 Å absorption serving as a key tracer of mass loss in hot gas giants.
Anna Ruth Taylor, Tommi T. Koskinen, Luca Argenti, Nicholas Lewis, Chenliang Huang, Anthony Arfaux, Panayotis Lavvas   +6 more
doaj   +1 more source