Results 31 to 40 of about 22,321,491 (359)
Survivability of planetary systems in young and dense star clusters [PDF]
Astronomy & Astrophysics, 2019 Aims. We perform a simulation using the Astrophysical Multipurpose Software Environment of the Orion Trapezium star cluster in which the evolution of the stars and the dynamics of planetary systems are taken into account. Methods.
A. V. Elteren +4 more
semanticscholar +1 more source
SOAR TESS Survey. I. Sculpting of TESS Planetary Systems by Stellar Companions [PDF]
Astronomical Journal, 2019 The Transiting Exoplanet Survey Satellite (TESS) is finding transiting planet candidates around bright, nearby stars across the entire sky. The large field of view, however, results in low spatial resolution; therefore, multiple stars contribute to ...
C. Ziegler +5 more
semanticscholar +1 more source
Cool DZ white dwarfs II: compositions and evolution of old remnant planetary systems [PDF]
, 2018 In a previous study, we analysed the spectra of 230 cool (Teff 1.9 dex, and Fe to Ni ratios similar to the bulk Earth, have accreted by far the most core-like exoplanetesimals discovered to date. With cooling ages in the range 1-8 Gyr, these white dwarfs
M. Hollands, B. Gaensicke, D. Koester
semanticscholar +1 more source
Fly-by encounters between two planetary systems I: Solar system analogues [PDF]
Monthly notices of the Royal Astronomical Society, 2019 Stars formed in clusters can encounter other stars at close distances. In typical open clusters in the Solar neighbourhood containing hundreds or thousands of member stars, 10–20 per cent of Solar-mass member stars are expected to encounter another star ...
Daohai Li, A. Mustill, M. Davies
semanticscholar +1 more source
International Astronomical Union Colloquium, 1999 AbstractThe past decade brought direct evidence of the previously surmised exoplanetary systems. A variety of planetary system types exist those around pulsars, around both young and old main-sequence stars (as evidenced by planetesimal disks of the Beta Pictoris-type), and the mature giant exoplanets found in radial velocity surveys.
openaire +1 more source
Observations and modeling of the transiting exoplanets XO-2b, HAT-P-18b, and WASP-80b [PDF]
Serbian Astronomical Journal, 2017 We present photometric observations and transit solutions of the exoplanets XO-2b, HAT-P-18b and WASP 80b. Our solution of the XO-2b transit gave system parameters whose values are close to those of the previous studies. The solutions of the new
Kjurkchieva Diana P. +2 more
doaj +1 more source
Planetary systems in a star cluster I: the Solar system scenario [PDF]
Monthly notices of the Royal Astronomical Society, 2019 Young stars are mostly found in dense stellar environments, and even our own Solar system may have formed in a star cluster. Here, we numerically explore the evolution of planetary systems similar to our own Solar system in star clusters.
F. F. Dotti +3 more
semanticscholar +1 more source
A Quantitative Comparison of Exoplanet Catalogs
Geosciences, 2018 In this study, we investigated the differences between four commonly-used exoplanet catalogs (exoplanet.eu; exoplanetarchive.ipac.caltech.edu; openexoplanetcatalogue.com; exoplanets.org) using a Kolmogorov–Smirnov (KS) test.
Dolev Bashi, Ravit Helled, Shay Zucker
doaj +1 more source
Influence of Stellar Metallicity on Occurrence Rates of Planets and Planetary Systems [PDF]
Astrophysical Journal, 2018 We study the influence of stellar metallicity on the fraction of stars with planets (i.e., the occurrence rate of planetary systems) and the average number of planets per star (i.e., the occurrence rate of planets). The former directly reveals the planet
Wei Zhu
semanticscholar +1 more source
Geosciences, 2018 “Free-floating, non-deuterium-burning, substellar objects” are isolated bodies of a few Jupiter masses found in very young open clusters and associations, nearby young moving groups, and in the immediate vicinity of the Sun.
José A. Caballero
doaj +1 more source