dimanche 13 janvier 2008

WASP-5 b


This year will surely be even a busier year for us with surging news
on transit discoveries----
http://arxiv.org/abs/0801.1685

Just a while ago there was WASP-4 b, but 4 & 5 seem quite different.

This is a "very-hot Jupiter", casually classified for planets whose orbital
periods are < 3 days. Despite the extreme proximity to the star
(a ~ 5 stellar radii), the planet is not inflated, but rather compact ---
it's in fact the densest very-hot Jupiter ever found.

There are some theories claim that the very-hot Jupiters are formed
not by standard migration but by circularization of eccentric orbits.
If that's the case, the planet should show a significant spin-orbit misalignment.
This is a G4V star with decent rotation so Rossiter-McLaughlin measurement
should not be too challenging.

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