2018A&A...615A..60A


Query : 2018A&A...615A..60A

2018A&A...615A..60A - Astronomy and Astrophysics, volume 615A, 60-60 (2018/7-1)

Puzzling out the coexistence of terrestrial planets and giant exoplanets. The 2/1 resonant periodic orbits.

ANTONIADOU K.I. and LIBERT A.-S.

Abstract (from CDS):


Aims. Hundreds of giant planets have been discovered so far and the quest of exo-Earths in giant planet systems has become intriguing. In this work, we aim to address the question of the possible long-term coexistence of a terrestrial companion on an orbit interior to a giant planet, and explore the extent of the stability regions for both non-resonant and resonant configurations.
Methods. Our study focuses on the restricted three-body problem, where an inner terrestrial planet (massless body) moves under the gravitational attraction of a star and an outer massive planet on a circular or elliptic orbit. Using the detrended fast Lyapunov indicator as a chaotic indicator, we constructed maps of dynamical stability by varying both the eccentricity of the outer giant planet and the semi-major axis of the inner terrestrial planet, and identify the boundaries of the stability domains. Guided by the computation of families of periodic orbits, the phase space is unravelled by meticulously chosen stable periodic orbits, which buttress the stability domains.
Results. We provide all possible stability domains for coplanar symmetric configurations and show that a terrestrial planet, either in mean-motion resonance or not, can coexist with a giant planet, when the latter moves on either a circular or an (even highly) eccentric orbit. New families of symmetric and asymmetric periodic orbits are presented for the 2/1 resonance. It is shown that an inner terrestrial planet can survive long time spans with a giant eccentric outer planet on resonant symmetric orbits, even when both orbits are highly eccentric. For 22 detected single-planet systems consisting of a giant planet with high eccentricity, we discuss the possible existence of a terrestrial planet. This study is particularly suitable for the research of companions among the detected systems with giant planets, and could assist with refining observational data.

Abstract Copyright: © ESO 2018

Journal keyword(s): celestial mechanics - planets and satellites: dynamical evolution and stability - minor planets, asteroids: general - planetary systems - methods: analytical - methods: numerical

Simbad objects: 21

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Number of rows : 21
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 HD 4113 PM* 00 43 12.5956705785 -37 58 57.479407429   8.61 7.88     G5V 75 1
2 HD 16175 PM* 02 37 01.9111510043 +42 03 45.469631505   7.92 7.28     G2 65 1
3 HD 20782 PM* 03 20 03.5777409770 -28 51 14.660409684   8.03 7.38     G1.5V 171 1
4 HD 23127 PM* 03 39 23.6379927997 -60 04 40.238654275   9.26 8.55     G2V 58 1
5 HD 28254 PM* 04 24 50.7051607506 -50 37 19.883490178   8.439 7.684 8.52   G5V 44 1
6 HD 29021 PM* 04 37 52.2213728465 +60 40 34.317915321   8.45 7.76     G5 29 0
7 HD 30562 PM* 04 48 36.3850664486 -05 40 26.554292788   6.40 5.77     G2IV 229 1
8 HD 45350 PM* 06 28 45.7111247856 +38 57 46.662846762   8.62 7.88     G5 90 1
9 HD 66428 PM* 08 03 28.6676195352 -01 09 45.759229097   8.97 8.26     G8IV(+G) 109 1
10 HD 79498 PM* 09 15 09.4023839004 +23 22 31.977099060       7.6   G5 52 1
11 HD 86226 PM* 09 56 29.8441755158 -24 05 57.795793912   8.563 7.93 7.71   G2V 58 1
12 HD 120084 PM* 13 42 39.2025612383 +78 03 51.979254923   6.916 5.899     G7III 43 1
13 HD 129445 PM* 14 46 03.0649385875 -68 45 45.876613839   9.57 8.79     G6V 41 1
14 HD 142415 PM* 15 57 40.7918993254 -60 12 00.922769552   7.94 7.34     G1V 99 1
15 HD 152079 PM* 16 53 29.7360693948 -46 19 58.640461341   9.91 9.16     G6V 49 1
16 * psi01 Dra B PM* 17 41 58.1041581273 +72 09 24.836647212   6.04 5.53 5.2   F8V 137 0
17 HD 171028 * 18 32 15.4932880849 +06 56 44.685775444   8.93 8.29     G0 56 1
18 HD 171238 PM* 18 34 43.6759690035 -28 04 20.334510860   9.41 8.65     G8V 52 1
19 HD 210277 PM* 22 09 29.8657193934 -07 32 55.163014863   8.85 8.57 7.36   G8V 311 1
20 HD 213240 PM* 22 31 00.3665162994 -49 25 59.767492660   7.41 6.80     G0/1V 160 1
21 HD 220773 PM* 23 26 27.4448077660 +08 38 37.839232685       6.97   G0 57 1

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2021.09.27-21:15:04

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