2016AJ....152..174A


Query : 2016AJ....152..174A

2016AJ....152..174A - Astron. J., 152, 174-174 (2016/December-0)

Dynamical constraints on the origin of hot and warm Jupiters with close friends.

ANTONINI F., HAMERS A.S. and LITHWICK Y.

Abstract (from CDS):

Gas giants orbiting their host star within the ice line are thought to have migrated to their current locations from farther out. Here we consider the origin and dynamical evolution of observed Jupiters, focusing on hot and warm Jupiters with outer friends. We show that the majority of the observed Jupiter pairs (20 out of 24) are dynamically unstable if the inner planet is placed at >=1 au distance from the stellar host. This finding is at odds with formation theories that invoke the migration of such planets from semimajor axes >=1 au due to secular dynamical processes (e.g., secular chaos, Lidov-Kozai [LK] oscillations) coupled with tidal dissipation. In fact, the results of N-body integrations show that the evolution of dynamically unstable systems does not lead to tidal migration but rather to planet ejections and collisions with the host star. This and other arguments lead us to suggest that most of the observed planets with a companion could not have been transported from farther out through secular migration processes. More generally, by using a combination of numerical and analytic techniques, we show that the high-e LK migration scenario can only account for less than 10% of all gas giants observed between 0.1 and 1 au. Simulations of multiplanet systems support this result. Our study indicates that rather than starting on highly eccentric orbits with orbital periods above 1 yr, these "warm" Jupiters are more likely to have reached the region where they are observed today without having experienced significant tidal dissipation.

Abstract Copyright: © 2016. The American Astronomical Society. All rights reserved.

Journal keyword(s): planetary systems - planets and satellites: dynamical evolution and stability - planets and satellites: gaseous planets - planets and satellites: gaseous planets

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 HD 9446 PM* 01 33 20.1847092432 +29 15 54.539434692   9.03   8.0   G5V 58 1
2 HD 12661 PM* 02 04 34.2881404104 +25 24 51.513637932   8.16   7.0   K0V 244 1
3 HD 13908 * 02 18 14.5609106880 +65 35 39.691213080   8.04 7.51     F8 36 1
4 HD 13908b Pl 02 18 14.5610467229 +65 35 39.691125116           ~ 5 1
5 HD 37605c Pl 05 40 01.7280924476 +06 03 38.074320708           ~ 13 1
6 HD 37605 PM* 05 40 01.7283246192 +06 03 38.072512008   9.52   8.1   K0 100 1
7 HD 38529b Pl 05 46 34.9129896843 +01 10 05.512540812           ~ 81 1
8 HD 38529 PM* 05 46 34.9131388488 +01 10 05.502949860       5.4   G8III/IV 330 2
9 HD 60532 PM* 07 34 03.1805638968 -22 17 45.843172440 5.02 4.94 4.39     F6IV-V 213 1
10 HD 73526 PM* 08 37 16.4833548528 -41 19 08.790456324   9.69 9.00     G6V 177 2
11 HAT-P-13 * 08 39 31.8072358440 +47 21 07.273799280   11.15 10.42 10.40   G4 123 2
12 HD 74156 PM* 08 42 25.1219511432 +04 34 41.145751740       7.2   G1V 213 2
13 HD 82943 PM* 09 34 50.7353072232 -12 07 46.369202196   7.17 6.53     F9VFe+0.5 435 2
14 BD+20 2459 * 10 17 06.6759730608 +19 33 30.435253452   11.26 10.19     ~ 20 0
15 * 23 Lib PM* 15 13 28.6669233518 -25 18 33.653388418   7.168 6.46 6.43   G6IV-V 281 1
16 HD 147018 PM* 16 23 00.1478804220 -61 41 19.559913914   9.07 8.30     G8/K0V 59 1
17 HD 155358 PM* 17 09 34.6176428924 +33 21 21.085565784       7.0   G0 146 1
18 HD 159243 PM* 17 33 21.5456483520 +05 42 02.633635440   9.19 8.65     G0 30 1
19 HD 163607 PM* 17 53 40.4946041184 +56 23 31.040169720   8.762 7.979 7.80   G5IV 61 1
20 HD 163607b Pl 17 53 40.4947748657 +56 23 31.038806287           ~ 18 1
21 HD 168443 PM* 18 20 03.9332862096 -09 35 44.614653900   7.62 6.92     G6V 294 1
22 HD 169830 * 18 27 49.4849984976 -29 49 00.700831380   6.406 5.902 7.01   F7V 264 1
23 Kepler-432 RG* 19 33 07.7290058280 +48 17 09.147604308           ~ 66 0
24 HD 187123 PM* 19 46 58.1122487784 +34 25 10.281404460       7.4   G2V 231 1
25 Kepler-424 Ro* 19 54 29.9854950120 +48 34 38.802689796           ~ 50 0
26 HD 202206 PM* 21 14 57.7686051936 -20 47 21.161521320   8.79 8.07     G6V 210 1
27 HD 207832 PM* 21 52 36.2807481168 -26 01 35.611377564   9.48 8.79     G5V 78 1
28 HD 217107 ** 22 58 15.5408995872 -02 23 43.383234768   6.919 6.163     G8IV/V 347 1

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2022.07.06-10:15:14

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