Results 101 to 110 of about 464 (180)

Structure and density of silicon carbide to 1.5 TPa and implications for extrasolar planets. [PDF]

Nat Commun, 2022
Kim D, Smith RF, Ocampo IK, Coppari F, Marshall MC, Ginnane MK, Wicks JK, Tracy SJ, Millot M, Lazicki A, Rygg JR, Eggert JH, Duffy TS.   +12 more
europepmc   +1 more source

Haze Optical Depth in Exoplanet Atmospheres Varies with Rotation Rate: Implications for Observations

The Astronomical Journal
Transmission spectroscopy supports the presence of uncharacterized, light-scattering and -absorbing hazes in the atmospheres of many exoplanets. The complexity of factors influencing the formation, 3D transport, radiative impact, and removal of hazes ...
Maureen Cohen, Paul I. Palmer, Adiv Paradise, Massimo A. Bollasina, Paola Ines Tiranti   +4 more
doaj   +1 more source

THESIS: terrestrial and habitable zone infrared spectroscopy spacecraft [PDF]

, 2008
THESIS is a concept for a medium class mission designed for spectroscopic characterization of extrasolar planets between 2-14 microns. The concept leverages off the recent first-steps made by Spitzer and Hubble in characterizing the atmospheres of alien ...
Deming, D., Grillmair, C. J., Vasisht, G., Greene, T. P., Burrows, A., Swain, M. R., Akeson, R. L.   +6 more
core  

Observational Signatures of a Previous Dynamical Instability in Multi-planet M-dwarf Systems

The Astrophysical Journal
We identify observational signatures suggesting a history of dynamical instability in 26 out of 34 M-dwarf multi-planet systems containing no large planets.
Anna C. Childs, Alexa P. S. Hua, Rebecca G. Martin, Chao-Chin Yang, Aaron M. Geller   +4 more
doaj   +1 more source

Magnesium oxide-water compounds at megabar pressure and implications on planetary interiors. [PDF]

Nat Commun, 2023
Pan S, Huang T, Vazan A, Liang Z, Liu C, Wang J, Pickard CJ, Wang HT, Xing D, Sun J.   +9 more
europepmc   +1 more source

Formation of Giant Planets and Brown Dwarves

, 2003
According to the prevailing core instability model, giant planets begin their growth by the accumulation of small solid bodies, as do terrestrial planets. However, unlike terrestrial planets, the growing giant planet cores become massive enough that they
Lissauer, Jack J.
core  

Ultrahigh-pressure disordered eight-coordinated phase of Mg₂GeO₄: Analogue for super-Earth mantles. [PDF]

Proc Natl Acad Sci U S A, 2022
Dutta R, Tracy SJ, Cohen RE, Miozzi F, Luo K, Yang J, Burnley PC, Smith D, Meng Y, Chariton S, Prakapenka VB, Duffy TS.   +11 more
europepmc   +1 more source

GEODYNAMICS AND RATE OF VOLCANISM ON MASSIVE EARTH-LIKE PLANETS

, 2009
We provide estimates of volcanism versus time for planets with Earth-like composition and masses 0.25–25 M⊕, as a step toward predicting atmospheric mass on extrasolar rocky planets. Volcanism requires melting of the silicate mantle.
E. S. Kite, M. Manga, E. Gaidos
core  

Role of Magma Oceans in Controlling Carbon and Oxygen of Sub-Neptune Atmospheres

The Astrophysical Journal
Most exoplanets with a few Earth radii are more inflated than bare-rock planets with the same mass, indicating a substantial volatile amount. Neither the origin of the volatiles nor the planet’s bulk composition can be constrained from the mass–radius ...
Chanoul Seo, Yuichi Ito, Yuka Fujii
doaj   +1 more source

Impact of Cosmic Rays on Atmospheric Ion Chemistry and Spectral Transmission Features of TRAPPIST-1e

The Astrophysical Journal
Ongoing observing projects like the James Webb Space Telescope and future missions offer the chance to characterize Earth-like exoplanetary atmospheres. Thereby, M dwarfs are preferred targets for transit observations, for example, due to their favorable
Konstantin Herbst, Andreas Bartenschlager, John Lee Grenfell, Nicolas Iro, Miriam Sinnhuber, Benjamin Taysum, Fabian Wunderlich, N. Eugene Engelbrecht, Juandre Light, Katlego D. Moloto, Jan-Vincent Harre, Heike Rauer, Franz Schreier   +12 more
doaj   +1 more source