Astronomy and Astrophysics – Astrophysics – Earth and Planetary Astrophysics
Scientific paper
2009-02-25
A&A 498, L5 (2009)
Astronomy and Astrophysics
Astrophysics
Earth and Planetary Astrophysics
revised after acceptance
Scientific paper
10.1051/0004-6361/200911954
We report the detection of the primary transit of the extra-solar planet HD 80606 b, thanks to photometric and spectroscopic observations performed at Observatoire de Haute-Provence, simultaneously with the CCD camera at the 120-cm telescope and the SOPHIE spectrograph at the 193-cm telescope. We observed the whole egress of the transit and partially its central part, in both data sets with the same timings. The ingress occurred before sunset and was not observed. The full duration of the transit was between 9.5 and 17.2 hours. The data allows the planetary radius to be measured (Rp = 0.9 +- 0.1 RJup) and other parameters of the system to be refined. Radial velocity measurements show the detection of a prograde Rossiter-McLaughlin effect, and provide a hint for a spin-orbit misalignment. If confirmed, this misalignment would corroborate the hypothesis that HD 80606 b owes its unusual orbital configuration to Kozai migration. HD 80606 b is by far the transiting planet on the longest period detected today. Its unusually small radius reinforces the observed relationship between the planet radius and the incident flux received from the star and opens new questions for theory. Orbiting a quite bright star (V=9), it opens opportunities to numerous follow-up studies.
Boisse Isabelle
Bonfils Xavier
Bouchy Florent
Delfosse Xavier
Desort Morgan
No associations
LandOfFree
Photometric and spectroscopic detection of the primary transit of the 111-day-period planet HD 80606 b 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 Photometric and spectroscopic detection of the primary transit of the 111-day-period planet HD 80606 b, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Photometric and spectroscopic detection of the primary transit of the 111-day-period planet HD 80606 b will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-253616