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SUMMARY:Free floating planets and their possible origins - Gavin Coleman [
 Queen Mary University London]
DTSTART:20250616T130000Z
DTEND:20250616T140000Z
UID:TALK231376@talks.cam.ac.uk
CONTACT:Thomas Jannaud
DESCRIPTION:In recent years\, free floating planets\, i.e. those planets n
 ot found to be in a planetary system and with no observable companions\, h
 ave begun to be found in microlensing and direct imaging surveys. Observat
 ions have shown that they have a wide variety of masses\, ranging from ter
 restrial-like to giant planets. Microlensing surveys predict that there co
 uld be on order tens of free floating planets per star in the Milky Way. H
 ow these planets form and arrive on their observed trajectories remains a 
 very open and intriguing question.\n\nWhilst there are many mechanisms for
  forming free floating planets\, e.g. ejections from planet-planet interac
 tions or gravitational collapse of gas within molecular clouds\, very few 
 models have predicted the properties of free floating planets on a global 
 scale. In this talk I will present the outcomes of state-of-the-art circum
 binary planet formation models\, that naturally produce a large abundance 
 free floating planets per system. I will show the resulting mass and veloc
 ity distributions arising from the models\, which will then be extended to
  include stellar populations of both single and binary stars\, taking into
  binary fractions\, and separations. The population distributions show cle
 ar observable features that can be investigated by future missions such as
  Roman\, where evidence of these features will directly point to the speci
 fic formation pathways of specific planets\, as well as informing on the p
 rocesses of the planet forming environment in which they originated.
LOCATION:MR14 DAMTP and online
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