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SUMMARY:Why young\, doomed hot Jupiters are easier to catch than old ones 
 - Andrew Collier-Cameron	(St. Andrews)
DTSTART:20190424T150000Z
DTEND:20190424T160000Z
UID:TALK121942@talks.cam.ac.uk
CONTACT:Richard Booth
DESCRIPTION:Massive planets in close orbits around their host stars underg
 o tidal orbit decay at a rate that increases with planet mass and proximit
 y to the host star. The upper left-hand corner of the hot-Jupiter mass-sep
 aration diagram is visibly depleted as a result. By modelling the underlyi
 ng population it’s possible to calibrate the strength of the tidal inter
 action from the location of the boundary. The model has some curious featu
 res. The probability of seeing a planet today depends on how much its migr
 ation has sped up since birth\, as well as the probability density for its
  birth location. Batches of planets formed recently at a given location ha
 ven’t yet been spread out by the accelerating flow\, whereas older batch
 es from further upstream have a more thinly-spread probability density. I
 ’ll show how this explains some curious features of the hot-Jupiter popu
 lation and their host stars.
LOCATION:Sackler Lecture Theatre\, Institute of Astronomy
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