Results 21 to 30 of about 16,942 (225)
Formation, Evolution and Multiplicity of Brown Dwarfs and Giant Exoplanets [PDF]
, 2010 "Highlights of Spanish Astrophysics V", Proceedings of the VIII Scientific Meeting of the Spanish Astronomical Society (SEA) held in Santander, 7-11 July, 2008. Edited by J. Gorgas, L. J. Goicoechea, J. I. Gonzalez-Serrano, J. M. Diego.
J. A. Caballero
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The eccentricity-mass distribution of exoplanets: signatures ofdifferent formation mechanisms? [PDF]
Astronomy & Astrophysics, 2007 We examine the distributions of eccentricity and host star metallicity of exoplanets as a function of their mass. Planets with M sin i >~ 4 M_J have an eccentricity distribution consistent with that of binary stars, while planets with M sin ...
I. Ribas, Jordi Miralda‐Escudé
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THE FORMATION OF URANUS AND NEPTUNE: CHALLENGES AND IMPLICATIONS FOR INTERMEDIATE-MASS EXOPLANETS [PDF]
The Astrophysical Journal, 2014 In this paper we investigate the formation of Uranus and Neptune, according to the core-nucleated accretion model, considering formation locations ranging from 12 to 30 AU from the Sun, and with various disk solid-surface densities and core accretion rates.
Ravit Helled, Peter Bodenheimer
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The discovery of exoplanets: towards understanding planet formation
Rendiconti Lincei. Scienze Fisiche e NaturaliAbstract The discovery of exoplanets has opened a new, very rich field in modern astronomy, allowing a much better insight into the characteristics of planets and the mechanisms for their formation than possible from only the observation of the Solar System.
R. Gratton
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Collisional formation of massive exomoons of superterrestrial exoplanets [PDF]
Monthly Notices of the Royal Astronomical Society, 2020 ABSTRACT Exomoons orbiting terrestrial or superterrestrial exoplanets have not yet been discovered; their possible existence and properties are therefore still an unresolved question. Here, we explore the collisional formation of exomoons through giant planetary impacts. We make use of smooth particle hydrodynamical collision simulations
Uri Malamud +3 more
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LkCa 15: A YOUNG EXOPLANET CAUGHT AT FORMATION? [PDF]
The Astrophysical Journal, 2011 Young and directly imaged exoplanets offer critical tests of planet-formation models that are not matched by RV surveys of mature stars. These targets have been extremely elusive to date, with no exoplanets younger than 10--20 Myr and only a handful of direct-imaged exoplanets at all ages.
Kraus, Adam L, Ireland, Michael
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Atmospheric signatures of giant exoplanet formation by pebble accretion [PDF]
Monthly Notices of the Royal Astronomical Society, 2017 Atmospheric chemical abundances of giant planets lead to important constraints on planetary formation and migration. Studies have shown that giant planets that migrate through the protoplanetary disc can accrete substantial amounts of oxygen-rich planetesimals, leading to supersolar metallicities in the envelope and solar or subsolar C/O ratios. Pebble
Madhusudhan, Nikku +3 more
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RESONANCES OF MULTIPLE EXOPLANETS AND IMPLICATIONS FOR THEIR FORMATION [PDF]
The Astrophysical Journal, 2014 5 pages, 5 figures, accepted for publication in ApJ ...
Xiaojia Zhang +3 more
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Sulfur-driven haze formation in warm CO2-rich exoplanet atmospheres [PDF]
Nature Astronomy, 2020 Sulfur gases significantly affect the photochemistry of planetary atmospheres in our Solar System, and are expected to be important components in exoplanet atmospheres. However, sulfur photochemistry in the context of exoplanets is poorly understood due to a lack of chemical-kinetics information for sulfur species under relevant conditions.
Chao He +10 more
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Understanding exoplanet formation, structure and evolution in 2010 [PDF]
Proceedings of the International Astronomical Union, 2010 AbstractIn this short review, we summarize our present understanding (and non-understanding) of exoplanet formation, structure and evolution, in the light of the most recent discoveries. Recent observations of transiting massive brown dwarfs seem to remarkably confirm the predicted theoretical mass-radius relationship in this domain.
G. Chabrier, J. Leconte, and I. Baraffe
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