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SUMMARY:Interaction between fast tides and convection with application to 
 giant planets and solar type stars - Caroline Terquem - University of Oxfo
 rd
DTSTART:20210510T130000Z
DTEND:20210510T140000Z
UID:TALK157813@talks.cam.ac.uk
CONTACT:Cleo Loi
DESCRIPTION:We propose a new formalism to calculate the exchange of energy
  between tides and a convective flow when the turnover timescale is larger
  than the tidal period. We argue that the standard picture\, in which the 
 tides are described as a mean shear flow which is damped by fluctuating co
 nvective eddies\, is inconsistent and should be reversed. In other words\,
  the fluctuations are the tidal oscillations and the mean shear flow is pr
 ovided by the largest convective eddies. The rate at which energy is excha
 nged between the tides and convection is then given by the coupling of the
  Reynolds stress associated the tidal velocity to the shear associated wit
 h the convective velocity. We further argue that\, even if energy is inter
 mittently transferred from convection to the tides\, it must ultimately re
 turn to the convective flow and transported efficiently to the stellar sur
 face on the convective timescale. This is consistent with assuming that en
 ergy is locally transferred from the tides to the convective flow. Using t
 his assumption\, we obtain values for the tidal dissipation Q factor of Ju
 piter and Saturn\, for the circularization periods of late-type binaries (
 taking into account the full time evolution of the stellar structure) and 
 for hot Jupiters in good overall agreement with observations.
LOCATION:Online
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