Ciceri, S, Lillo-Box, J, Southworth, J, Mancini, L, Henning, T and Barrado, D (2014) Kepler-432 b: a massive planet in a highly eccentric orbit transiting a red giant. ASTRONOMY & ASTROPHYSICS, 573.

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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.

Item Type: Article
Uncontrolled Keywords: planetary systems, stars: fundamental parameters, stars: individual: Kepler-432
Subjects: Q Science > QB Astronomy
Divisions: Faculty of Natural Sciences > School of Physical and Geographical Sciences
Related URLs:
Depositing User: Symplectic
Date Deposited: 11 Nov 2015 09:41
Last Modified: 15 May 2019 08:55
URI: http://eprints.keele.ac.uk/id/eprint/1126

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