Results 91 to 100 of about 6,856,607 (225)
Do Super-puffs Defy Core Accretion? Population-wide Interior Structure Constraints
The Astrophysical JournalSub-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 +2 more
doaj +1 more source
, 2014 A unique short-period (P = 0.65356(1) d) Mercury-size Kepler exoplanet candidate KIC012557548b has been discovered recently by Rappaport et al. (2012).
Zhou, Guyin (George) +6 more
core +1 more source
On the feasibility of exomoon detection via exoplanet phase curve spectral contrast [PDF]
, 2017 The author gratefully acknowledges support from the ECOGAL project, grant agreement 291227, funded by the European Research Council under ERC-2011-ADG.An exoplanet-exomoon system presents a superposition of phase curves to observers - the dominant ...
Forgan, D. H., D. H. Forgan
core +1 more source
The Astrophysical JournalExoplanet 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 +4 more
doaj +1 more source
Towards a Theory for the Atmospheres, Structure, and Evolution of Giant Exoplanets [PDF]
Proceedings of the International Astronomical Union, 2011 AbstractIn this short review, I summarize some of the salient features of the emerging theory of exoplanets in general, and of giant exoplanets in particular. A focus is on the characterization of transiting planets at primary and secondary eclipse, but various other related topics are covered, if only briefly.
openaire +1 more source
Evolution of Steam Worlds: Energetic Aspects
The Astrophysical JournalSub-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 +5 more
doaj +1 more source
Most High-density Exoplanets Are Unlikely to Be Remnant Giant Planet's Cores
The Astrophysical Journal LettersSome 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
A Giant Impact as the Likely Origin of Different Twins in the Kepler-107 Exoplanet System [PDF]
, 2019 Measures of exoplanet bulk densities indicate that small exoplanets with radius less than 3 Earth radii (R(sub )) range from low-density sub-Neptunes containing volatile elements to higher-density rocky planets with Earth-like or iron-rich (Mercury-like)
Affer, Laura +62 more
core +1 more source
dfm/exoplanet: exoplanet v0.1.5
, 2019 <ul> <li>Improves contact point solver using companion matrix to solve quadratic</li> <li>Improves reliability of <code>Angle</code> distribution when the value of the angle is well constrained</li> </ul ...
Dan Foreman-Mackey +2 more
core +1 more source
Fleeting but Not Forgotten: The Imprint of Escaping Hydrogen Atmospheres on Super-Earth Interiors
The Astrophysical JournalSmall, 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 +2 more
doaj +1 more source