How Rare Are TESS Free-floating Planets? [PDF]
The Astrophysical Journal LettersRecently, 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 +5 more
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Tilted Circumbinary Planetary Systems as Efficient Progenitors of Free-floating Planets [PDF]
The Astrophysical Journal Letters, 2023 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 +3 more
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Parallax Effect in Microlensing Events Due to Free-floating Planets [PDF]
The Astronomical JournalOne 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
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Searching for Free-floating Planets with TESS: Results from Sectors 61–65 [PDF]
The Astronomical JournalThough free-floating planets (FFPs) may outpopulate their bound counterparts in the terrestrial-mass range, they remain one of the least explored exoplanet demographics.
Michelle Kunimoto +4 more
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Free-floating Planets, Survivor Planets, Captured Planets, and Binary Planets from Stellar Flybys [PDF]
The Astrophysical JournalIn 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
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Free-floating "planets'' in the macrolensed quasar Q2237+0305 [PDF]
Monthly Notices of the Royal Astronomical SocietyIt has been claimed that the variability of field quasars resembles gravitational lensing by a large cosmological population of free-floating planets with mass ∼10 M⊕.
Artem V. Tuntsov +2 more
semanticscholar +5 more sources
Free-floating or Wide-orbit? Keck Adaptive-optics Observations of Free-floating Planet Candidates Detected with Gravitational Microlensing [PDF]
The 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
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Close encounters involving free-floating planets in star clusters [PDF]
, 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
Church, Ross P. +4 more
core +4 more sources
Constraints on sub-terrestrial free-floating planets from Subaru microlensing observations [PDF]
Monthly notices of the Royal Astronomical Society, 2023 The abundance of protoplanetary bodies ejected from their parent star system is presently poorly-constrained. With only two existing optical observations of interstellar objects in the 108 − 1010 kg mass range and a small number of robust microlensing ...
William DeRocco +2 more
semanticscholar +5 more sources
Terrestrial- and Neptune-mass Free-Floating Planet Candidates from the MOA-II 9 yr Galactic Bulge Survey [PDF]
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 +31 more
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