2014A&A...561A.103O


Query : 2014A&A...561A.103O

2014A&A...561A.103O - Astronomy and Astrophysics, volume 561A, 103-103 (2014/1-1)

An independent planet search in the Kepler dataset. II. An extremely low-density super-earth mass planet around Kepler-87.

OFIR A., DREIZLER S., ZECHMEISTER M. and HUSSER T.-O.

Abstract (from CDS):

The primary goal of the Kepler mission is the measurement of the frequency of Earth-like planets around Sun-like stars. However, the confirmation of the smallest of Kepler's candidates in long periods around FGK dwarfs is extremely difficult or even beyond the limit of current radial velocity technology. Transit timing variations (TTVs) may offer the possibility for these confirmations of near-resonant multiple systems by the mutual gravitational interaction of the planets. We previously detected the second planet candidate in the KOI1574 system. The two candidates have relatively long periods (about 114d and 191d) and are in 5:3 resonance. We therefore searched for TTVs in this particularly promising system. The full Kepler data was detrended with the proven SARS pipeline. The entire data allowed one to search for TTVs of the above signals, and to search for additional transit-like signals. We detected strong anti-correlated TTVs of the 114d and 191d signals, dynamically confirming them as members of the same system. Dynamical simulations reproducing the observed TTVs allowed us to also determine the masses of the planets. We found KOI 1574.01 (hereafter Kepler-87b) to have a radius of 13.49±0.55 R and a mass of 324.2±8.8 M, and KOI 1574.02 (Kepler-87c) to have a radius of 6.14±0.29 R and a mass of 6.4±0.8 M. Both planets have low densities of 0.729 and 0.152 g/cm3, respectively, which is non-trivial for such cold and old (7-8 Gyr) planets. Specifically, Kepler-87c is the lowest-density planet in the super-Earth mass range. Both planets are thus particularly amenable to modeling and planetary structure studies, and also present an interesting case where ground-based photometric follow-up of Kepler planets is very desirable. Finally, we also detected two more short-period super-Earth sized (<2 R) planetary candidates in the system, making the relatively high multiplicity of this system notable against the general paucity of multiple systems in the presence of giant planets like Kepler-87b.

Abstract Copyright:

Journal keyword(s): methods: data analysis - planetary systems

CDS comments: Figure 8. Planet G36b not identified.

Simbad objects: 28

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Number of rows : 28
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 NAME LP 424-4b Pl 07 59 05.8395618539 +15 23 29.240025256           ~ 212 1
2 * rho01 Cnc e Pl 08 52 35.8113282132 +28 19 50.956901366           ~ 466 1
3 HAT-P-26b Pl 14 12 37.5331103311 +04 03 36.116569918           ~ 123 1
4 NAME G 139-21b Pl 17 15 18.9337265994 +04 57 50.064695682           ~ 598 1
5 Kepler-30b Pl 19 01 08.0746750853 +38 56 50.218666290           ~ 64 1
6 Kepler-30d Pl 19 01 08.0746750853 +38 56 50.218666290           ~ 59 1
7 Kepler-10b Pl 19 02 43.0613892904 +50 14 28.701617339           ~ 264 1
8 Kepler-20b Pl 19 10 47.5234815840 +42 20 19.299357667           ~ 94 1
9 Kepler-20c Pl 19 10 47.5234815840 +42 20 19.299357667           ~ 85 1
10 Kepler-22 PM* 19 16 52.1904191915 +47 53 03.947532134   11.5   11.70   G5 80 1
11 BD+48 2893c Pl 19 24 07.7660110490 +49 02 24.928201112           ~ 48 1
12 BD+48 2893b Pl 19 24 07.7660110490 +49 02 24.928201112           ~ 79 1
13 Kepler-36c Pl 19 25 00.0430855076 +49 13 54.631289830           ~ 105 1
14 Kepler-36b Pl 19 25 00.0430855076 +49 13 54.631289830           ~ 130 1
15 Kepler-35b Pl 19 37 59.2726236478 +46 41 22.952068619           ~ 83 1
16 Kepler-11b Pl 19 48 27.6228219845 +41 54 32.902654079           ~ 135 1
17 Kepler-11d Pl 19 48 27.6228219845 +41 54 32.902654079           ~ 106 1
18 Kepler-11c Pl 19 48 27.6228219845 +41 54 32.902654079           ~ 99 1
19 Kepler-11f Pl 19 48 27.6228219845 +41 54 32.902654079           ~ 120 1
20 Kepler-11e Pl 19 48 27.6228219845 +41 54 32.902654079           ~ 110 1
21 Kepler-11 Ro* 19 48 27.6228219845 +41 54 32.902654079       14.00   G2V 315 1
22 BD+47 2936b Pl 19 50 50.2474562793 +48 04 51.097364378           ~ 335 1
23 Kepler-87b Pl 19 51 40.0490992347 +46 57 54.427022288           ~ 30 1
24 Kepler-87c Pl 19 51 40.0490992347 +46 57 54.427022288           ~ 38 1
25 Kepler-87 Ro* 19 51 40.0490992347 +46 57 54.427022288           ~ 53 2
26 Kepler-18b Pl 19 52 19.0688249829 +44 44 46.807526602           ~ 67 1
27 Kepler-18d Pl 19 52 19.0688249829 +44 44 46.807526602           ~ 67 1
28 Kepler-18c Pl 19 52 19.0688249829 +44 44 46.807526602           ~ 65 1

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2021.12.06-18:47:06

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