First Evidence of a Retrograde Orbit of Transiting Exoplanet HAT-P-7b

Details First Evidence of a Retrograde Orbit of Transiting Exoplanet HAT-P-7b First Evidence of a Retrograde Orbit of Transiting Exoplanet HAT-P-7b

2009-08-12

arxiv.org/abs/0908.1673v2

Astronomy and Astrophysics

Astrophysics

Earth and Planetary Astrophysics

PASJ Letters, in press [13 pages]

Scientific paper

We present the first evidence of a retrograde orbit of the transiting exoplanet HAT-P-7b. The discovery is based on a measurement of the Rossiter-McLaughlin effect with the Subaru HDS during a transit of HAT-P-7b, which occurred on UT 2008 May 30. Our best-fit model shows that the spin-orbit alignment angle of this planet is \lambda = -132.6 (+10.5, -16.3) degrees. The existence of such a retrograde planet have been predicted by recent planetary migration models considering planet-planet scattering processes or the Kozai migration. Our finding provides an important milestone that supports such dynamic migration theories.

Affiliated with

Also associated with

No associations

Rating

First Evidence of a Retrograde Orbit of Transiting Exoplanet HAT-P-7b does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with First Evidence of a Retrograde Orbit of Transiting Exoplanet HAT-P-7b, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and First Evidence of a Retrograde Orbit of Transiting Exoplanet HAT-P-7b will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-370365