2014A&A...571A..38B


Query : 2014A&A...571A..38B

2014A&A...571A..38B - Astronomy and Astrophysics, volume 571A, 38-38 (2014/11-1)

TRADES: A new software to derive orbital parameters from observed transit times and radial velocities. Revisiting Kepler-11 and Kepler-9.

BORSATO L., MARZARI F., NASCIMBENI V., PIOTTO G., GRANATA V., BEDIN L.R. and MALAVOLTA L.

Abstract (from CDS):

With the purpose of determining the orbital parameters of exoplanetary systems from observational data, we have developed a software, named TRADES (TRAnsits and Dynamics of Exoplanetary Systems), to simultaneously fit observed radial velocities and transit times data. We implemented a dynamical simulator for N-body systems, which also fits the available data during the orbital integration and determines the best combination of the orbital parameters using grid search, χ2 minimization, genetic algorithms, particle swarm optimization, and bootstrap analysis. To validate TRADES, we tested the code on a synthetic three-body system and on two real systems discovered by the Kepler mission: Kepler-9 and Kepler-11. These systems are good benchmarks to test multiple exoplanet systems showing transit time variations (TTVs) due to the gravitational interaction among planets. We have found that orbital parameters of Kepler-11 planets agree well with the values proposed in the discovery paper and with a a recent work from the same authors. We analyzed the first three quarters of Kepler-9 system and found parameters in partial agreement with discovery paper. Analyzing transit times (T0s), covering 12 quarters of Kepler data, that we have found a new best-fit solution. This solution outputs masses that are about 55% of the values proposed in the discovery paper; this leads to a reduced semi-amplitude of the radial velocities of about 12.80m/s.

Abstract Copyright:

Journal keyword(s): methods: numerical - celestial mechanics - stars: individual: Kepler-11 - stars: individual: Kepler-9

Simbad objects: 13

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Number of rows : 13
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 Kepler-9d Pl 19 02 17.7544105084 +38 24 03.177247136           ~ 52 1
2 Kepler-9c Pl 19 02 17.7544105084 +38 24 03.177247136           ~ 90 1
3 Kepler-9 Ro* 19 02 17.7544105084 +38 24 03.177247136     13.9 14.09   G2 169 1
4 Kepler-9b Pl 19 02 17.7544105084 +38 24 03.177247136           ~ 94 1
5 Kepler-19 Ro* 19 21 40.9995767736 +37 51 06.436261131   12.88 12.04 12.02   ~ 73 1
6 Kepler-88c Pl 19 24 35.5431466733 +40 40 09.809821705           ~ 15 1
7 Kepler-11e Pl 19 48 27.6228219845 +41 54 32.902654079           ~ 111 1
8 Kepler-11c Pl 19 48 27.6228219845 +41 54 32.902654079           ~ 99 1
9 Kepler-11f Pl 19 48 27.6228219845 +41 54 32.902654079           ~ 121 1
10 Kepler-11b Pl 19 48 27.6228219845 +41 54 32.902654079           ~ 135 1
11 Kepler-11d Pl 19 48 27.6228219845 +41 54 32.902654079           ~ 107 1
12 Kepler-11g Pl 19 48 27.6228219845 +41 54 32.902654079           ~ 72 1
13 Kepler-11 Ro* 19 48 27.6228219845 +41 54 32.902654079       14.00   G2V 316 1

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2021.12.09-14:15:48

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