Results 11 to 20 of about 4,598,556 (263)
Characterization of exoplanets from their formation [PDF]
Astronomy and Astrophysics, 2012 A first characterization of many exoplanets has recently been achieved by the observational determination of their radius. For some planets, a measurement of the luminosity has also been possible, with many more directly imaged planets expected in the future.
C. Mordasini +5 more
+16 more sources
Atmospheric signatures of giant exoplanet formation by pebble accretion [PDF]
Monthly Notices of the Royal Astronomical Society, 2016 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 disk can accrete substantial amounts of oxygen-rich ...
N. Madhusudhan +3 more
semanticscholar +6 more sources
The Roman Microlensing Survey: Confirmation or Refutation of Gas Giant Exoplanet Formation Theories
The Astrophysical JournalExoplanet research has moved from the discovery of new classes of planets toward creating a census of exoplanet population demographics across the spectrum of exoplanet and host star masses.
Alan P. Boss
doaj +2 more sources
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
+6 more sources
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
openalex +4 more sources
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
openalex +3 more sources
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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Exoplanets and Their Characterization in the Environment of Galaxy Formation
Journal of Material Sciences and Engineering TechnologyThe exploration of exoplanets has emerged as a pivotal area of research in astrophysics, particularly in understanding their formation and evolution within the context of galaxy formation. This paper presents a comprehensive review of current methodologies for exoplanet detection and characterization, emphasizing the interplay between galactic dynamics
Diriba Gonfa Tolasa, Adugna Furi
openalex +2 more sources