Results 121 to 130 of about 8,932,640 (210)
The Astronomical JournalIt has been suggested that β Pic b has a supersolar metallicity and subsolar C/O ratio. Assuming solar carbon and oxygen abundances for the star β Pic and therefore the planet’s parent protoplanetary disk, β Pic b’s C/O ratio suggests that it formed via ...
Henrique Reggiani +7 more
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The Case for Edge-on Binaries: An Avenue Toward Comparative Exoplanet Demographics
The Astrophysical Journal LettersMost Sun-like and higher-mass stars reside in systems that include one or more gravitationally bound stellar companions. These systems offer an important probe of planet formation in the most common stellar systems, while also providing key insights into
Joseph E. Hand +2 more
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A Candidate High-velocity Exoplanet System in the Galactic Bulge
The Astronomical JournalAbstract We present an analysis of adaptive optics images from the Keck I telescope of the microlensing event MOA-2011-BLG-262. The original discovery paper by Bennett et al. reports two possibilities for the lens system: a nearby gas giant lens with an exomoon companion or a very low-mass star with a planetary companion in the Galactic ...
Sean K. Terry +13 more
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Unexpected Near-Resonant and Metastable States of Young Multiplanet Systems
The Astrophysical JournalRecent observations suggest that the incidence of near-resonant planets declines as planetary systems age, making young planetary systems key signposts of early dynamical evolution.
Zhecheng Hu +6 more
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Rattle-and-break: The Impact of Planetesimal Scattering on Super-Earth Resonant Chains
The Astrophysical JournalThe spacings of super-Earths in multitransiting systems exhibit a distribution that is broad and mostly featureless, with the exception of notable excesses of planet pairs situated a few percent wide of first-order mean-motion resonances (MMRs).
Sam Hadden, Yanqin Wu
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Hic Sunt Dracones: Uncovering Dynamical Perturbers within the Habitable Zone
The Astronomical JournalThe continuing exploration of neighboring planetary systems is providing deeper insights into the relative prevalence of various system architectures, particularly with respect to the solar system.
Stephen R. Kane, Jennifer A. Burt
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White dwarf systems: Exoplanets and debris disks
Although there is abundant and diverse observational evidence in support of white dwarf stars hosting planets or debris disks which form in the catastrophic destruction of various planetary bodies, the key processes that explain these observations are still being intensely investigated.
openaire +2 more sources
No Strong Associations between Eccentricity and Orbital Architecture in Kepler Compact Multis
The Astronomical JournalThe dynamical history of a planetary system is recorded in the present day architecture of its constituent planets’ sizes, orbital periods, and eccentricities.
Gregory J. Gilbert +2 more
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Warm Jupiter Tidal Migration Can Spare Inner Planets; Hot Jupiter Tidal Migration May Not
The Astrophysical JournalIn this work, we investigate the dynamical survival of short-period inner planets during the high-eccentricity tidal migration of companion exterior giant planets.
Juliette Becker
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How to Size an Exoplanet? A Model Approach for Visualization
, 2013 The realization and experiences with a physical exoplanet model in the education and outreach are described. During the tests with students in the classroom and adults at public demonstrations, the following conclusions were drawn: in the visualization ...
Kereszturi, Akos
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