Results 1 to 10 of about 938 (165)
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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Let’s Sweep: The Effect of Evolving J 2 on the Resonant Structure of a Three-planet System
The Astrophysical Journal, 2023 Short and ultrashort period planets are peculiar types of exoplanets with periods as short as a few days or less. Although it is challenging to detect them, already several have been observed, with many additional candidates.
Thea H. Faridani +3 more
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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 +3 more
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The Astronomical Journal, 2023 We investigate and compare the composition of M-dwarf planets in systems with only one known planet (“singles”) to those residing in multiplanet systems (“multis”) and the fundamental properties of their host stars.
Romy Rodríguez Martínez +6 more
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Dynamical Evolution of Closely Packed Multiple Planetary Systems Subject to Atmospheric Mass Loss
The Astronomical Journal, 2023 A gap in exoplanets’ radius distribution has been widely attributed to the photoevaporation threshold of their progenitors’ gaseous envelope. Giant impacts can also lead to substantial mass loss.
Su Wang, D. N. C. Lin
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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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Characterization of exoplanets from their formation [PDF]
Astronomy and Astrophysics, 2012 The research of exoplanets has entered an era in which we characterize extrasolar planets. This has become possible with measurements of radii and luminosities. Meanwhile, radial velocity surveys discover also very low-mass planets. Uniting all this observational data into one coherent picture to better understand planet formation is an important, but ...
C. Mordasini +5 more
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Exoplanet Volatile Carbon Content as a Natural Pathway for Haze Formation
The Astrophysical Journal Letters, 2023 We explore terrestrial planet formation with a focus on the supply of solid-state organics as the main source of volatile carbon. For the water-poor Earth, the water ice line, or ice sublimation front, within the planet-forming disk has long been a key ...
Edwin A. Bergin +7 more
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TOI-1136 is a Young, Coplanar, Aligned Planetary System in a Pristine Resonant Chain
The Astronomical Journal, 2023 Convergent disk migration has long been suspected to be responsible for forming planetary systems with a chain of mean-motion resonances (MMRs). Dynamical evolution over time could disrupt the delicate resonant configuration. We present TOI-1136, a 700 ±
Fei Dai +62 more
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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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