Results 91 to 100 of about 1,944 (221)

Exoplanet atmospheres at high spectral resolution [PDF]

The spectrum of an exoplanet reveals the physical, chemical, and biological processes that have shaped its history and govern its future. However, observations of exoplanet spectra are complicated by the overwhelming glare of their host stars.
Birkby, Jayne
core   +1 more source

Do Super-puffs Defy Core Accretion? Population-wide Interior Structure Constraints

The Astrophysical Journal
Sub-Saturn mass planets with extremely low bulk densities ( ρ  ≲ 0.3 g cm ^−3 ), or “super-puffs,” are one of the most interesting and least understood populations of exoplanets.
Nicholas T. Marston, Juliette Becker, Alex R. Howe   +2 more
doaj   +1 more source

The need for laboratory work to aid in the understanding of exoplanetary atmospheres [PDF]

, 2016
Advancements in our understanding of exoplanetary atmospheres, from massive gas giants down to rocky worlds, depend on the constructive challenges between observations and models.
Wang, Sharon X., Teal, Dillon, Lyons, James, Amundsen, David Skålid, Moses, Julianne, Charbonneau, David, Kopparapu, Ravi Kumar, Kane, Stephen, Marley, Mark S., Meadows, Victoria, Domagal-Goldman, Shawn, Wright, Jason T., Imanaka, Hiroshi, Pierrehumbert, Raymond, Burrows, Adam, Helling, Christiane, Heng, Kevin, Fortney, Jonathan J., Kok, Remco de, Jensen, Adam G., Lopez-Morales, Mercedes, Lyra, Wladimir, Freedman, Richard S., Barman, Travis, Brogi, Matteo, Hebrard, Eric, Robinson, Tyler D., Claire, Mark, Bernath, Peter, Lewis, Nikole K., Crisp, David, Venot, Olivia, Kempton, Eliza M. -R., Gelino, Dawn   +33 more
core  

Terrestrial Exoplanet Internal Structure Constraints Enabled by Comprehensive Host Star Characterization Reveal That Terrestrial Planets in Mean Motion Resonances Are Water Rich

The Astrophysical Journal
Exoplanet mass and radius inferences fundamentally rely on host star mass and radius inferences. Despite the importance of host star mass, radius, and elemental abundance inferences for the derivation of exoplanet internal structure constraints ...
Alejandra Ross, Henrique Reggiani, Kevin C. Schlaufman, Mykhaylo Plotnykov, Diana Valencia   +4 more
doaj   +1 more source

Statistical Trends in JWST Transiting Exoplanet Atmospheres [PDF]

Our brains are hardwired for pattern recognition as correlations are useful for predicting and understanding nature. As more exoplanet atmospheres are being characterized with JWST, we are starting to unveil their properties on a population level.
David K. Sing, Andrew W. Mann, Shang-Min Tsai, Kevin B. Stevenson, Sagnick Mukherjee, Pa Chia Thao, Cyril Gapp, Luis Welbanks, Romain Allart, Joshua Lothringer, Peter Gao, Thomas G. Beatty, Stefan Pelletier, Thomas M. Evans-Soma, Guangwei Fu, Daniel Thorngren   +15 more
core   +1 more source

Evolution of Steam Worlds: Energetic Aspects

The Astrophysical Journal
Sub-Neptunes occupy an intriguing region of planetary mass–radius space, where theoretical models of interior structure predict that they could be water-rich, where water is in steam and supercritical state.
Artyom Aguichine, Natalie Batalha, Jonathan J. Fortney, Nadine Nettelmann, James E. Owen, Eliza M.-R. Kempton   +5 more
doaj   +1 more source

A global map of the atmospheric circulation and thermal structure for an ultrahot exoplanet [PDF]

, 2017
WASP-121b is one of the standout exoplanets available for atmospheric characterization, both in transmission and emission, due to its large radius (1.8 Jupiter radii), high temperature ( 2700K), and bright host star (H=9.4mag).
Barstow, Joanna, Nikolov, Nikolay, Lewis, Nikole, Mayne, Nathan, Evans, Tom, Deming, Drake, Marley, Mark, Wakeford, Hannah, Sing, David, Gibson, Neale, Spake, Jessica, Drummond, Benjamin, Tiffany, Kataria, Henry, Gregory   +13 more
core  

Most High-density Exoplanets Are Unlikely to Be Remnant Giant Planet's Cores

The Astrophysical Journal Letters
Some exoplanets have much higher densities than expected from stellar abundances of planet-forming elements. There are two theories—metal-rich formation hypothesis and naked core hypothesis—that explain how formation and evolution can alter the ...
Zifan Lin, Saverio Cambioni, Sara Seager
doaj   +1 more source

Fleeting but Not Forgotten: The Imprint of Escaping Hydrogen Atmospheres on Super-Earth Interiors

The Astrophysical Journal
Small, close-in exoplanets are divided into two subpopulations: super-Earths and sub-Neptunes. Most super-Earths are thought to have lost their primordially accreted hydrogen-dominated atmospheres via thermally driven winds.
James G. Rogers, Hilke E. Schlichting, Edward D. Young   +2 more
doaj   +1 more source

APPLE: An Evolution Code for Modeling Giant Planets

The Astrophysical Journal
We introduce APPLE , a novel planetary evolution code designed specifically for the study of giant exoplanet and Jovian planet evolution in the era of Galileo, Juno, and Cassini. With APPLE , state-of-the-art equations of state for hydrogen, helium, ice,
Ankan Sur, Yubo Su, Roberto Tejada Arevalo, Yi-Xian Chen, Adam Burrows   +4 more
doaj   +1 more source