2015ApJ...800...46B


C.D.S. - SIMBAD4 rel 1.7 - 2019.10.20CEST07:52:33

2015ApJ...800...46B - Astrophys. J., 800, 46 (2015/February-2)

Radial velocity observations and light curve noise modeling confirm that Kepler-91b is a giant planet orbiting a giant star.

BARCLAY T., ENDL M., HUBER D., FOREMAN-MACKEY D., COCHRAN W.D., MacQUEEN P.J., ROWE J.F. and QUINTANA E.V.

Abstract (from CDS):

Kepler-91b is a rare example of a transiting hot Jupiter around a red giant star, providing the possibility to study the formation and composition of hot Jupiters under different conditions compared to main-sequence stars. However, the planetary nature of Kepler-91b, which was confirmed using phase-curve variations by Lillo-Box et al., was recently called into question based on a re-analysis of Kepler data. We have obtained ground-based radial velocity observations from the Hobby-Eberly Telescope and unambiguously confirm the planetary nature of Kepler-91b by simultaneously modeling the Kepler and radial velocity data. The star exhibits temporally correlated noise due to stellar granulation which we model as a Gaussian Process. We hypothesize that it is this noise component that led previous studies to suspect Kepler-91b to be a false positive. Our work confirms the conclusions presented by Lillo-Box et al. that Kepler-91b is a 0.73±0.13 MJup planet orbiting a red giant star.

Abstract Copyright:

Journal keyword(s): methods: data analysis - methods: statistical - planetary systems - stars: individual: (Kepler-91, KIC 8219268, KOI-2133) - techniques: photometric - techniques: radial velocities

Simbad objects: 2

goto Full paper

goto View the reference in ADS

Number of rows : 2

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2019
#notes
1 Kepler-91 RG* 19 02 41.4979092591 +44 07 00.239792240           K1IV 50 1
2 KOI-2133b Pl 19 02 41.4979092591 +44 07 00.239792240           ~ 50 1

    Equat.    Gal    SGal    Ecl

To bookmark this query, right click on this link: simbad:objects in 2015ApJ...800...46B and select 'bookmark this link' or equivalent in the popup menu


2019.10.20-07:52:33

© Université de Strasbourg/CNRS

    • Contact