Results 1 to 10 of about 20,871 (275)

Secure Identification of Free‐floating Planets

open access: yesAstrophysical Journal, 2006
Among the methods proposed to detect extrasolar planets, microlensing is the only technique that can detect free-floating planets. Free-floating planets are detected through the channel of short-duration isolated lensing events.
Cheongho Han
exaly   +4 more sources

Free-floating Planets, Survivor Planets, Captured Planets, and Binary Planets from Stellar Flybys

open access: yesThe Astrophysical Journal
In star clusters, close stellar encounters can strongly impact the architecture of a planetary system or even destroy it. We present a systematic study of the effects of stellar flybys on two-planet systems.
Fangyuan Yu, Dong Lai
doaj   +4 more sources

Close encounters involving free-floating planets in star clusters [PDF]

open access: yesMonthly Notices of the Royal Astronomical Society, 2015
Instabilities in planetary systems can result in the ejection of planets from their host system, resulting in free-floating planets (FFPs). If this occurs in a star cluster, the FFP may remain bound to the star cluster for some time and interact with the
Long Wang   +2 more
exaly   +4 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   +3 more sources

ON THE ORIGIN OF PLANETS AT VERY WIDE ORBITS FROM THE RECAPTURE OF FREE FLOATING PLANETS

open access: yesAstrophysical Journal, 2012
In recent years several planets have been discovered at wide orbits (>100 AU) around their host stars. Theoretical studies encounter difficulties in explaining their formation and origin.
Hagai B. Perets, M B N Kouwenhoven
exaly   +3 more sources

Two new free-floating or wide-orbit planets from microlensing [PDF]

open access: yesAstronomy and Astrophysics, 2019
Planet formation theories predict the existence of free-floating planets that have been ejected from their parent systems. Although they emit little or no light, they can be detected during gravitational microlensing events. Microlensing events caused by
Przemek Mroz   +2 more
exaly   +3 more sources

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

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

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

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