Volume 573, January 2015
|Number of page(s)||4|
|Published online||22 December 2014|
Kepler-432 b: a massive planet in a highly eccentric orbit transiting a red giant ⋆
Max Planck Institute for Astronomy, Königstuhl 17, 69117, Heidelberg, Germany
2 Departamento de Astrofísica, Centro de Astrobiología (CSIC-INTA), 28691 Villanueva de la Cañada, Madrid, Spain
3 Astrophysics Group, Keele University, Staffordshire, ST5 5BG, UK
Received: 10 October 2014
Accepted: 28 November 2014
We report the first disclosure of the planetary nature of Kepler-432 b (aka Kepler object of interest KOI-1299.01). We accurately constrained its mass and eccentricity by high-precision radial velocity measurements obtained with the CAFE spectrograph at the CAHA 2.2-m telescope. By simultaneously fitting these new data and Kepler photometry, we found that Kepler-432 b is a dense transiting exoplanet with a mass of Mp = 4.87 ± 0.48MJup and radius of Rp = 1.120 ± 0.036RJup. The planet revolves every 52.5 d around a K giant star that ascends the red giant branch, and it moves on a highly eccentric orbit with e = 0.535 ± 0.030. By analysing two near-IR high-resolution images, we found that a star is located at 1.1′′ from Kepler-432, but it is too faint to cause significant effects on the transit depth. Together with Kepler-56 and Kepler-91, Kepler-432 occupies an almost-desert region of parameter space, which is important for constraining the evolutionary processes of planetary systems.
Key words: planetary systems / stars: fundamental parameters / stars: individual: Kepler-432
RV data (Table A.1) are only available at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (220.127.116.11) or via http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/573/L5
© ESO, 2014
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.