S. Ciceri
Kepler-432 b: a massive planet in a highly eccentric orbit transiting a red giant
Ciceri, S.; Lillo-Box, J.; Southworth, J.; Mancini, L.; Th. Henning; Barrado, D.
Abstract
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.
Journal Article Type | Article |
---|---|
Acceptance Date | Nov 28, 2014 |
Online Publication Date | Dec 22, 2014 |
Publication Date | 2015-01 |
Publicly Available Date | Mar 28, 2024 |
Journal | ASTRONOMY & ASTROPHYSICS |
Print ISSN | 0004-6361 |
Electronic ISSN | 1432-0746 |
Publisher | EDP Sciences |
Peer Reviewed | Peer Reviewed |
Volume | 573 |
Article Number | L5 |
DOI | https://doi.org/10.1051/0004-6361/201425145 |
Keywords | planetary systems, stars: fundamental parameters, stars: individual: Kepler-432 |
Publisher URL | https://doi.org/10.1051/0004-6361/201425145 |
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