Results 21 to 30 of about 828 (196)
Exoplanet host stars SPHERE multiplicity survey : J/A+A/649/A156 [PDF]
, 2021 VizieR online Data Catalogue associated with article published in journal Astronomy & Astrophysics with title 'How many suns are in the sky? A SPHERE multiplicity survey of exoplanet host stars. I.
Mugrauer, M. +5 more
core +1 more source
Astronomy & Astrophysics, 2023 Context. The extremely low density of several long-period exoplanets in mature systems is still unexplained - with HIP 41378 f being archetypical of this category. It has been proposed that such planets could actually have normal densities but be surrounded by a ring observed approximately face on, mimicking the transit depth of a puffy planet.
Saillenfest, Melaine +3 more
openaire +3 more sources
Characterization of exoplanet hosts [PDF]
, 2013 Spectroscopic analysis of exoplanet hosts and the stellar sample from which they are drawn provides abundances and other properties that quantitively constrain models of planet formation.
Valenti Jeff A., Jeff A. Valenti
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An Exoplanet in orbit around Tau^1 Gruis [PDF]
, 2003 We report the detection of a new candidate exoplanet around the metal-rich star τ1 Gruis. With M sin i= 1.26 ± 0.18 MJup , a period of 1391 ± 300 d and an orbit with an eccentricity of 0.14 ± 0.14 it adds to the growing population of long-period ...
Tinney, Chris G. +13 more
core +1 more source
Evidence for Low-level Dynamical Excitation in Near-resonant Exoplanet Systems
The Astronomical Journal, 2023 The geometries of near-resonant planetary systems offer a relatively pristine window into the initial conditions of exoplanet systems. Given that near-resonant systems have likely experienced minimal dynamical disruptions, the spin–orbit orientations of ...
Malena Rice +20 more
doaj +1 more source
Multiplicity study of transiting exoplanet hosts. I. : J/A+A/635/A73 [PDF]
, 2020 VizieR online Data Catalogue associated with article published in journal Astronomy & Astrophysics with title 'A multiplicity study of transiting exoplanet host stars. I.
Kenworthy, M.A. +6 more
core +1 more source
Hot Jupiters Have Giant Companions: Evidence for Coplanar High-eccentricity Migration
The Astrophysical Journal Letters, 2023 This study considers the characteristics of planetary systems with giant planets based on a population-level analysis of the California Legacy Survey planet catalog. We identified three characteristics common to hot Jupiters (HJs).
Jon K. Zink, Andrew W. Howard
doaj +1 more source
Planetary migration and the origin of the 2:1 and 3:2 (near)-resonant population of close-in exoplanets [PDF]
Astronomy & Astrophysics, 2017 We present an analytical and numerical study of the orbital migration and resonance capture of fictitious two-planet systems with masses in the super-Earth range undergoing Type-I migration. We find that, depending on the flare index and proximity to the central star, the average value of the period ratio, $P_2/P_1$, between both planets may show a ...
Ramos, X. S. +3 more
openaire +4 more sources
The Astrophysical Journal, 2023 Protoplanets formed in a marginally gravitationally unstable (MGU) disk by either core accretion or disk instability will be subject to dynamical interactions with massive spiral arms, possibly resulting in inward or outward orbital migration, mergers ...
Alan P. Boss
doaj +1 more source
The Transiting Exoplanet Community Early Release Science Program for JWST [PDF]
, 2018 The James Webb Space Telescope (JWST) presents the opportunity to transform our understanding of planets and the origins of life by revealing the atmospheric compositions, structures, and dynamics of transiting exoplanets in unprecedented detail. However,
Todorov, K.O. +3 more
core +1 more source