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          Institute: MPI für Astronomie     Collection: Publikationen_mpia     Display Documents

ID: 720306.0, MPI für Astronomie / Publikationen_mpia
Kepler-432 b: a massive planet in a highly eccentric orbit transiting a red giant
Authors:Ciceri, S.; Lillo-Box, J.; Southworth, J.; Mancini, L.; Henning, T.; Barrado, D.
Date of Publication (YYYY-MM-DD):2015
Title of Journal:Astronomy and Astrophysics
Start Page:id. L5 (4 pp)
Audience:Not Specified
Abstract / Description: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.
Free Keywords:planetary systems; stars: fundamental parameters; stars: individual: Kepler-432
External Publication Status:published
Document Type:Article
Communicated by:N. N.
Affiliations:MPI für Astronomie
Identifiers:ISSN:0004-6361 %R 10.1051/0004-6361/201425145
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