Results 21 to 30 of about 3,577,944 (216)

Hunting for Cold Exoplanets via Microlensing

open access: yesComptes Rendus. Physique, 2023
Microlensing can detect planets at distances ranging from a few hundred parsecs all the way to the Galactic center. The maximum sensitivity is reached for systems that are located half way to the galactic center, with planets orbiting the lens star at a ...
Beaulieu, Jean-Philippe
doaj   +1 more source

Interaction of free-floating planets with a star–planet pair [PDF]

open access: yesCelestial Mechanics and Dynamical Astronomy, 2012
The recent discovery of free-floating planets and their theoretical interpretation as celestial bodies, either condensed independently or ejected from parent stars in tight clusters, introduced an intriguing possibility. Namely, that some exoplanets are not condensed from the protoplanetary disk of their parent star.
Varvoglis, Harry   +2 more
openaire   +2 more sources

Are There Terrestrial Planets Lurking in the Outer Solar System?

open access: yesThe Astrophysical Journal Letters, 2023
Motivated by recent measurements of the free-floating-planet mass function at terrestrial masses, we consider the possibility that the solar system may have captured a terrestrial planet early in its history.
Amir Siraj
doaj   +1 more source

Multiplicity among free-floating planets

open access: yes, 2022
International audienceWe propose to use WFC3/UVIS to study the multiplicity of a sample of 60 young free-floating planets recently identified in the nearby Upper Scoand Taurus associations.
Barrado Navascues, David   +15 more
core   +3 more sources

Free-floating or Wide-orbit? Keck Adaptive-optics Observations of Free-floating Planet Candidates Detected with Gravitational Microlensing

open access: yesThe Astronomical Journal, 2023
Recent detections of extremely short-timescale microlensing events imply the existence of a large population of Earth- to Neptune-mass planets that appear to have no host stars.
Przemek Mróz   +3 more
doaj   +1 more source

Primordial Planets with an Admixture of Dark Matter Particles and Baryonic Matter

open access: yesUniverse, 2023
It has been suggested that primordial planets could have formed in the early universe and the missing baryons in the universe could be explained by primordial free-floating planets of solid hydrogen.
O. V. Kiren   +2 more
doaj   +1 more source

Planet–planet scattering alone cannot explain the free-floating planet population [PDF]

open access: yesMonthly Notices of the Royal Astronomical Society: Letters, 2012
ABSTRACT Recent gravitational microlensing observations predict a vast population of free-floating giant planets that outnumbers main-sequence stars almost twofold. A frequently invoked mechanism for generating this population is a dynamical instability that incites planet–planet scattering and the ejection of one or more planets in ...
Veras, Dimitri, Raymond, Sean N.
openaire   +3 more sources

Microlensing for extrasolar planets : improving the photometry [PDF]

open access: yes, 2013
Gravitational Microlensing, as a technique for detecting Extrasolar Planets, is recognised for its potential in discovering small-mass planets similar to Earth, at a distance of a few Astronomical Units from their host stars.
Bajek, David J.
core   +2 more sources

Microlensing planets in M 22: Free-floating or bound? [PDF]

open access: yesAstronomy & Astrophysics, 2001
We use detailed numerical simulations and theoretical estimates to show that, if confirmed, the unusually brief microlensing events observed by Sahu et al. (2001) in the field of the globular cluster M22 might be explained as a result of microlensing by a population of clustered MACHOs, a dark cluster or RAMBO, not associated with the globular cluster.
Marcos, R. de la Fuente   +1 more
openaire   +2 more sources

Home - About - Disclaimer - Privacy