Results 111 to 120 of about 3,429 (163)
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
doaj +1 more source
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
openaire +6 more sources
Solar System Ice Giants: Exoplanets in our Backyard
, 2018 Future remote sensing of exoplanets will be enhanced by a thorough investigation of our solar system Ice Giants (Neptune-size planets). What can the configuration of the magnetic field tell us (remotely) about the interior, and what implications does that field have for the structure of the magnetosphere; energy input into the atmosphere, and surface ...
Rymer, Abigail +112 more
openaire +6 more sources
Mapping out the time-evolution of exoplanet processes [PDF]
, 2019 There are many competing theories and models describing the formation, migration and evolution of exoplanet systems. As both the precision with which we can characterize exoplanets and their host stars, and the number of systems for which we can make ...
Christiansen, Jessie +4 more
core
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
doaj +1 more source
Analytic Exoplanet Transit Analysis, and Investigation into WASP, Kepler, and Qatar Systems [PDF]
, 2020 In this paper we analyze exoplanet transit data. First, we discuss an analytical method of assessing the data similar to the one derived in Agol & Mandel, 20021.
Gulla, Colan
core +1 more source
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
doaj +1 more source
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
doaj +1 more source
The HD 191939 Exoplanet System is Well Aligned and Flat
The Astronomical JournalAbstract We report the sky-projected spin–orbit angle λ for HD 191939 b, the innermost planet in a six-planet system, using Keck/KPF to detect the Rossiter–McLaughlin (RM) effect. Planet b is a sub-Neptune with radius 3.4 ± 0.8 R ⊕ and mass 10.0 ± 0.7 M ⊕ with an RM amplitude <1 m s−1.
Jack Lubin +27 more
openaire +5 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
doaj +1 more source