Results 31 to 40 of about 21,014 (313)

Hunting for Cold Exoplanets via Microlensing

Comptes 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?

The 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

Universe, 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, Arun Kenath, Chandra Sivaram   +2 more
doaj   +1 more source

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

Celestial 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, Sgardeli, Vasiliki, Tsiganis, Kleomenis   +2 more
openaire   +2 more sources

Terrestrial- and Neptune-mass Free-Floating Planet Candidates from the MOA-II 9 yr Galactic Bulge Survey

The Astronomical Journal, 2023
We report the discoveries of low-mass free-floating planet (FFP) candidates from the analysis of 2006–2014 MOA-II Galactic bulge survey data. In this data set, we found 6111 microlensing candidates and identified a statistical sample consisting of 3535 ...
Naoki Koshimoto, Takahiro Sumi, David P. Bennett, Valerio Bozza, Przemek Mróz, Andrzej Udalski, Nicholas J. Rattenbury, Fumio Abe, Richard Barry, Aparna Bhattacharya, Ian A. Bond, Hirosane Fujii, Akihiko Fukui, Ryusei Hamada, Yuki Hirao, Stela Ishitani Silva, Yoshitaka Itow, Rintaro Kirikawa, Iona Kondo, Yutaka Matsubara, Shota Miyazaki, Yasushi Muraki, Greg Olmschenk, Clément Ranc, Yuki Satoh, Daisuke Suzuki, Mio Tomoyoshi, Paul J. Tristram, Aikaterini Vandorou, Hibiki Yama, Kansuke Yamashita, MOA Collaboration   +31 more
doaj   +1 more source

Direct imaging constraints on planet populations detected by microlensing [PDF]

, 2012
Results from gravitational microlensing suggested the existence of a large population of free-floating planetary mass objects. The main conclusion from this work was partly based on constraints from a direct imaging survey.
Beaulieu, Cassan, Chauvin, Cumming, D. Lafrenière, Delorme, E. Buenzli, Gould, Heinze, Lafrenière, M. M. Reggiani, M. R. Meyer, S. P. Quanz, Sumi, Sumi   +14 more
core   +1 more source

Capture of free-floating planets by planetary systems [PDF]

Monthly Notices of the Royal Astronomical Society, 2017
Evidence of exoplanets with orbits that are misaligned with the spin of the host star may suggest that not all bound planets were born in the protoplanetary disk of their current planetary system. Observations have shown that free-floating Jupiter-mass objects can exceed the number of stars in our galaxy, implying that capture scenarios may not be so ...
Nadav Goulinski, Erez N. Ribak
openaire   +3 more sources

Interpreting the M22 Spike Events [PDF]

, 2001
Recently Sahu et al., using the Hubble Space Telescope to monitor stars in the direction of the old globular cluster M22, detected six events in which otherwise constant stars brightened by ~50% during a time of 1 AU would have been ionized by random ...
Armitage P. J., Bouvier J., Fabian A. C., Gonzalez G., Heggie D. C., Paczynski B., Piotto G., Udalski A., Udalski A., Udalski A., Vesperini E., Witt H.   +11 more
core   +2 more sources

Free-floating planets in the Milky Way [PDF]

Arabian Journal of Mathematics, 2019
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Hamolli L., Hafizi M., de Paolis F., Nucita A. A.   +3 more
openaire   +2 more sources

The origin of free-floating planets

Astrophysics and Space Science, 2023
AbstractFree-floating planets (FFPs) are the lightest products of star formation and they carry important information on the initial conditions of the environment in which they were formed. They were first discovered in the 2000 s but still few of them have been identified and confirmed due to observational challenges.
openaire   +4 more sources