Results 11 to 20 of about 16,468 (216)
On the local formation of the TRAPPIST-1 exoplanets [PDF]
The Astronomical JournalAbstract The discovery of seven approximately Earth-mass planets orbiting the 0.09 M ⊙ M dwarf TRAPPIST-1 captivated the public and sparked a proliferation of investigations into the system’s origins. Among other properties, the resonant architecture of the planets has been interpreted to imply that orbital migration ...
Matthew S. Clement +2 more
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Rapid Formation of Jupiter and Wide-orbit Exoplanets in Disks with Pressure Bumps [PDF]
The Astrophysical Journal, 2021 Abstract The formation of gas-giant planets within the lifetime of a protoplanetary disk is challenging especially far from a star. A promising model for the rapid formation of giant-planet cores is pebble accretion in which gas drag during encounters leads to high accretion rates.
John Chambers
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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.
Adam L. Kraus, Michael Ireland
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Planet formation – implication of statistical properties of exoplanets [PDF]
Journal of Physics: Conference Series, 2010 Models of planetary formation are developed based on the observation of our Solar System, star-forming regions and circumstellar disks and on an the ever increasing number of exoplanetary systems. The solar nebula theory and the planetesimal hypothesis are discussed.
Á. Süli
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Haze Formation in Warm H2-rich Exoplanet Atmospheres
The Planetary Science Journal, 2020 Abstract New observing capabilities coming online over the next few years will provide opportunities for characterization of exoplanet atmospheres. However, clouds/hazes could be present in the atmospheres of many exoplanets, muting the amplitude of spectral features.
Chao He +10 more
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THE IMPRINT OF EXOPLANET FORMATION HISTORY ON OBSERVABLE PRESENT-DAY SPECTRA OF HOT JUPITERS [PDF]
The Astrophysical Journal, 2016 ABSTRACT The composition of a planet’s atmosphere is determined by its formation, evolution, and present-day insolation. A planet’s spectrum therefore may hold clues on its origins. We present a “chain” of models, linking the formation of a planet to its observable present-day spectrum.
C. Mordasini +4 more
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C/O Ratios and the formation of wide separation exoplanets [PDF]
The Astrophysical Journal LettersAbstract The gas and solid-state C/O ratios provide context to potentially link the atmospheric composition of planets to that of the natal disk. We provide a synthesis of extant estimates of the gaseous C/O and C/H ratios in planet-forming disks obtained primarily through analysis of Atacama Large Millimeter/submillimeter Array ...
Edwin A. Bergin +3 more
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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 ...
Sergei Nayakshin
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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 +2 more
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Characterization of exoplanets from their formation [PDF]
Astronomy & Astrophysics, 2017 44 pages, 26 figures (journal format). A&A in print.
C. Mordasini +2 more
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