Results 81 to 90 of about 15,226 (162)

Differentiation of silicates and iron during formation of Mercury and high-density exoplanets [PDF]

Monthly Notices of the Royal Astronomical Society, 2014
Recent MESSENGER observations confirmed that Mercury is dominated by a disproportionally large iron-rich core, and also showed a surprisingly high content of a moderately volatile element K on the planet's surface. This latter observation challenges several popular models for the iron-rich composition of the planet that invoke extreme heating of the ...
openaire   +3 more sources

Cloud formation in exoplanet atmospheres : nucleation of small molecular clusters

, 2023
It has been inferred that many exoplanets host clouds in their atmospheres. Understanding the processes through which these clouds form, and being able to model them is essential for our understanding of their climate and to explain our observations.
openaire   +3 more sources

The evolution of hot Jupiters revealed by the age distribution of their host stars. [PDF]

Proc Natl Acad Sci U S A, 2023
Chen DC, Xie JW, Zhou JL, Dong S, Yang JY, Zhu W, Liu C, Huang Y, Xiang MS, Wang HF, Zheng Z, Luo AL, Zhang JH, Zhu Z.   +13 more
europepmc   +1 more source

Science with an ngVLA: Observing the Effects of Chemistry on Exoplanets and Planet Formation

, 2018
One of the primary mechanisms for inferring the dynamical history of planets in our Solar System and in exoplanetary systems is through observation of elemental ratios (i.e. C/O). The ability to effectively use these observations relies critically on a robust understanding of the chemistry and evolutionary history of the observed abundances ...
McGuire, Brett A., Bergin, Edwin, Blake, Geoffrey A., Burkhardt, Andrew M., Cleeves, L. Ilsedore, Loomis, Ryan A., Remijan, Anthony J., Shingledecker, Christopher N., Willis, Eric R.   +8 more
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The Clear Sky Corridor: Insights Towards Aerosol Formation in Exoplanets Using an AI-based Survey of Exoplanet Atmospheres

The Astronomical Journal
Abstract Producing optimized and accurate transmission spectra of exoplanets from telescope data has traditionally been a manual and labor intensive procedure. Here we present the results of the first attempt to improve and standardize this procedure by using artificial-intelligence-based (AI-based) processing of light curves and ...
Reza Ashtari, Kevin B. Stevenson, David Sing, Mercedes López-Morales, Munazza K. Alam, Nikolay K. Nikolov, Thomas M. Evans-Soma   +6 more
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JWST's eyes on an alien world. [PDF]

Innovation (Camb), 2023
Zhang X.
europepmc   +1 more source

Fully fluorinated non-carbon compounds NF₃ and SF₆ as ideal technosignature gases. [PDF]

Sci Rep, 2023
Seager S, Petkowski JJ, Huang J, Zhan Z, Ravela S, Bains W.   +5 more
europepmc   +1 more source

Stability of hydrides in sub-Neptune exoplanets with thick hydrogen-rich atmospheres. [PDF]

Proc Natl Acad Sci U S A, 2023
Kim T, Wei X, Chariton S, Prakapenka VB, Ryu YJ, Yang S, Shim SH.   +6 more
europepmc   +1 more source

Unraveling the complex inventory of biorelevant organics in the plumes of icy moons. [PDF]

Proc Natl Acad Sci U S A, 2023
Kaiser RI.
europepmc   +1 more source

Atmospheric Studies of brown-Dwarfs and Exoplanets: Insights into Planet Formation and Evolution

, 2018
Cette thèse se focalise sur les propriétés atmosphériques des exoplanètes et des naines brunes et le lien avec les mécanismes de formation. Dans la première partie, le ratio des abondances de carbone et d'oxygène (C/O) du compagnon et de son étoile hôte est utilisé comme proxy.
openaire   +2 more sources