Results 11 to 20 of about 20,871 (275)

Free-floating planets from core accretion theory: microlensing predictions [PDF]

Monthly Notices of the Royal Astronomical Society: Letters, 2016
We calculate the microlensing event rate and typical time-scales for the free-floating planet (FFP) population that is predicted by the core accretion theory of planet formation.
Ida, Shigeru, Lin, Douglas N. C., Ma, Sizheng, Mao, Shude, Zhu, Wei   +4 more
core   +6 more sources

Properties of Free-floating Planets Ejected through Planet–Planet Scattering

The Astrophysical Journal
Multiple studies show that planet–planet scattering plays a key role in the dynamical evolution of planetary systems. It can also contribute to the census of free-floating planets.
Hareesh Gautham Bhaskar, Hagai B. Perets
doaj   +3 more sources

Planet-Planet Scattering Alone Cannot Explain the Free-Floating Planet Population [PDF]

Monthly Notices of the Royal Astronomical Society: Letters, 2012
Recent gravitational microlensing observations predict a vast population of free-floating giant planets that outnumbers main sequence stars almost twofold.
Adams, Barnes, Bihain, Binney, Boley, Boley, Boss, Bowler, Butler, Chabrier, Chambers, Chatterjee, Crida, Cumming, Delorme, Dimitri Veras, Dodson-Robinson, Ford, Ford, Ford, Gould, Holberg, Howard, Johnson, Johnson, Jurić, Kennedy, Lada, Lin, Lin, Lovis, Lucas, Malmberg, Malmberg, Marois, Marois, Marzari, Nielsen, Nielsen, Papaloizou, Parker, Parravano, Rasio, Raymond, Raymond, Raymond, Raymond, Raymond, Ribas, Sean N. Raymond, Shen, Sumi, Tremaine, Udry, Veras, Veras, Veras, Weidenschilling, Weinberg, Wright, Zakamska, Zapatero Osorio, Zapatero Osorio   +62 more
core   +5 more sources

How Rare Are TESS Free-floating Planets?

The Astrophysical Journal Letters
Recently, Kunimoto et al. claimed that a short-lived signal in the Transiting Exoplanet Survey Satellite (TESS) Sector 61 database was possibly caused by a microlensing event with a terrestrial-mass free-floating planet (FFP) lens.
Hongjing Yang, Weicheng Zang, Tianjun Gan, Renkun Kuang, Andrew Gould, Shude Mao   +5 more
doaj   +3 more sources

Microlensing by Kuiper, Oort, and Free-Floating Planets

Journal of The Korean Astronomical Society, 2016
Microlensing is generally thought to probe planetary systems only out to a few Einstein radii. Microlensing events generated by bound planets beyond about 10 Einstein radii generally do not yield any trace of their hosts, and so would be classified as ...
Gould, Andrew
core   +3 more sources

Microlensing planets in M22: free-floating or bound? [PDF]

Astronomy & 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.
Adams, Alcock, Bonnell, Boss, C. de la Fuente Marcos, , Cote, Davidge, de la Fuente Marcos, de la Fuente Marcos, de la Fuente Marcos, de la Fuente Marcos, Eggleton, Gaudi, Jetzer, Kerins, Laughlin, Laughlin, Lucas, Mao, Metcalf, Moore, Paczynski, R. de la Fuente Marcos, , Scalo, Smith, Sánchez-Salcedo, Sánchez-Salcedo, Witt, Zapatero Osorio   +28 more
core   +2 more sources

Dynamical Instability of Multiplanet Systems and Free-floating Planets

The Astrophysical Journal
The ejection of planets by the instability of planetary systems is a potential source of free-floating planets. We numerically simulate multiplanet systems to study the evolution process, the properties of the surviving systems, and the statistics of the
Ruocheng Zhai, Man Hoi Lee, Tianjun Gan, Shude Mao   +3 more
doaj   +3 more sources

Tilted Circumbinary Planetary Systems as Efficient Progenitors of Free-floating Planets

The Astrophysical Journal Letters
The dominant mechanism for generating free-floating planets has so far remained elusive. One suggested mechanism is that planets are ejected from planetary systems due to planet–planet interactions.
Cheng Chen, Rebecca G. Martin, Stephen H. Lubow, C. J. Nixon   +3 more
doaj   +4 more sources

Parallax Effect in Microlensing Events Due to Free-floating Planets

The Astronomical Journal
One of the most important applications of microlensing observations is the detection of free-floating planets (FFPs). The timescale of microlensing due to FFPs ( t _E ) is short (a few days). Discerning the annual parallax effect in observations of these
Parisa Sangtarash, Sedighe Sajadian
doaj   +3 more sources

Free-floating Planets Produced by Planet–Planet Scatterings: Ejection Velocity and Survival Rate of Their Moons

The Astrophysical Journal
The discovery of numerous free-floating planets (FFPs) has intensified interest in their origins and dynamical histories. A leading formation mechanism is planet–planet scatterings in unstable multiplanetary systems, which can naturally lead to planetary
Xiumin Huang, Dong Lai
doaj   +3 more sources