| Issue |
A&A
Volume 485, Number 3, July III 2008
|
|
|---|---|---|
| Page(s) | 871 - 875 | |
| Section | Planets and planetary systems | |
| DOI | https://doi.org/10.1051/0004-6361:20079238 | |
| Published online | 15 May 2008 | |
Improved parameters for the transiting planet HD 17156b: a high-density giant planet with a very eccentric orbit *,**
1
Observatoire de Genève, Université de Genève, 51 Chemin des Maillettes, 1290 Sauverny, Switzerland e-mail: michael.gillon@obs.unige.ch
2
Laboratoire d'Astrophysique, École Polytechnique Fédérale de Lausanne (EPFL), Observatoire de Sauverny, 1290 Versoix, Switzerland
Received:
12
December
2007
Accepted:
12
April
2008
We report high-precision transit photometry for the recently detected planet HD 17156b. Using these new data with previously published transit photometry and radial velocity measurements, we perform a combined analysis based on a Markov Chain Monte Carlo approach. The resulting mass 
and radius 
RJup for the planet places it at the outer edge of the density distribution of known transiting planets with 
. The obtained transit ephemeris is 
BJD. The derived plausible tidal circularization time scales for HD 17156b are larger than the age of the host star. The measured high orbital eccentricity 
can thus not be interpreted as the clear sign of the presence of another body in the system.
Key words: binaries: eclipsing / planetary systems / stars: individual: HD 17156 / techniques: photometric
© ESO, 2008
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.