2020AJ....159..242W


Query : 2020AJ....159..242W

2020AJ....159..242W - Astron. J., 159, 242-242 (2020/May-0)

The discovery of the long-period, eccentric planet Kepler-88 d and system characterization with radial velocities and photodynamical analysis.

WEISS L.M., FABRYCKY D.C., AGOL E., MILLS S.M., HOWARD A.W., ISAACSON H., PETIGURA E.A., FULTON B., HIRSCH L. and SINUKOFF E.

Abstract (from CDS):

We present the discovery of Kepler-88 d (Pd=1403±14days, Msinid=965±44M=3.04±0.13MJ, ed=0.41±0.03) based on six years of radial velocity (RV) follow-up from the W. M. Keck Observatory High Resolution Echelle Spectrometer spectrograph. Kepler-88 has two previously identified planets. Kepler-88 b (KOI-142.01) transits in the NASA Kepler photometry and has very large transit timing variations (TTVs). Nesvorny et al. performed a dynamical analysis of the TTVs to uniquely identify the orbital period and mass of the perturbing planet (Kepler-88 c), which was later was confirmed with RVs from the Observatoire de Haute-Provence (OHP). To fully explore the architecture of this system, we performed photodynamical modeling on the Kepler photometry combined with the RVs from Keck and OHP and stellar parameters from spectroscopy and Gaia. Planet d is not detectable in the photometry, and long-baseline RVs are needed to ascertain its presence. A photodynamical model simultaneously optimized to fit the RVs and Kepler photometry yields the most precise planet masses and orbital properties yet for b and c: Pb=10.91647±0.00014days, Mb=9.5±1.2M, Pc=22.2649±0.0007days, and Mc=214.0±5.3M. The photodynamical solution also finds that planets b and c have low eccentricites and low mutual inclination, are apsidally anti-aligned, and have conjunctions on the same hemisphere of the star. Continued RV follow-up of systems with small planets will improve our understanding of the link between inner planetary system architectures and giant planets.

Abstract Copyright: © 2020. The American Astronomical Society. All rights reserved.

Journal keyword(s): Exoplanet astronomy - Exoplanets - Exoplanet systems - Exoplanet detection methods

VizieR on-line data: <Available at CDS (J/AJ/159/242): table1.dat table6.dat>

Simbad objects: 16

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Number of rows : 16
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024
#notes
1 * rho01 Cnc EB* 08 52 35.8111044043 +28 19 50.954994470 7.45 6.82   5.4   K0IV-V 1117 1
2 * rho01 Cnc e Pl 08 52 35.8111044043 +28 19 50.954994470           ~ 575 1
3 Kepler-25 Er* 19 06 33.2141354736 +39 29 16.358725104   11.337 10.623 10.622   F6 154 1
4 BD+40 3638 Er* 19 14 45.2915908224 +41 09 04.210237980   11.643 11.115 11.009   F6IV 124 1
5 BD+41 3306 PM* 19 19 00.5489000285 +41 38 04.582441681 10.01 9.67 8.86 8.18 7.66 K0V 286 0
6 BD+48 2893 Er* 19 24 07.7659706688 +49 02 24.928348272   10.73 10.08 9.914   G1V 135 1
7 Kepler-88d Pl 19 24 35.5430965488 +40 40 09.809893020           ~ 4 0
8 Kepler-88c Pl 19 24 35.5430965488 +40 40 09.809893020           ~ 18 1
9 Kepler-88b Pl 19 24 35.5430965488 +40 40 09.809893020           ~ 59 1
10 Kepler-88 Er* 19 24 35.5430965488 +40 40 09.809893020   14.192 13.257 13.084   G8IV 82 1
11 Kepler-56 RG* 19 35 02.0011980936 +41 52 18.692360400   13.954 12.756 12.379   ~ 174 1
12 Kepler-108 Er* 19 38 14.2463250912 +46 03 44.108625420       12.485   ~ 85 0
13 Kepler-89d Pl 19 49 19.9343204784 +41 53 28.006017936           ~ 85 1
14 Kepler-223 Er* 19 53 16.4202435936 +47 16 46.308434088   16.209 15.570 15.78   ~ 158 1
15 WASP-47e Pl 22 04 48.7261549272 -12 01 07.998743676           ~ 74 0
16 WASP-47 * 22 04 48.7261549272 -12 01 07.998743676     11.99 11.82   ~ 164 1

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