2023MNRAS.521.2002R

Query : 2023MNRAS.521.2002R

2023MNRAS.521.2002R - Mon. Not. R. Astron. Soc., 521, 2002-2011 (2023/May-2)

Constellations of co-orbital planets: horseshoe dynamics, long-term stability, transit timing variations, and potential as SETI beacons.

RAYMOND S.N., VERAS D., CLEMENT M.S., IZIDORO A., KIPPING D. and MEADOWS V.

Abstract (from CDS):

Co-orbital systems contain two or more bodies sharing the same orbit around a planet or star. The best-known flavours of co-orbital systems are tadpoles (in which two bodies' angular separations oscillate about the L4/L5 Lagrange points 60° apart) and horseshoes (with two bodies periodically exchanging orbital energy to trace out a horseshoe shape in a co-rotating frame). Here, we use N-body simulations to explore the parameter space of many-planet horseshoe systems. We show that up to 24 equal-mass, Earth-mass planets can share the same orbit at 1 au, following a complex pattern in which neighbouring planets undergo horseshoe oscillations. We explore the dynamics of horseshoe constellations, and show that they can remain stable for billions of years and even persist through their stars' post-main sequence evolution. With sufficient observations, they can be identified through their large-amplitude, correlated transit timing variations. Given their longevity and exotic orbital architectures, horseshoe constellations may represent potential SETI beacons.

Abstract Copyright: © 2023 The Author(s) Published by Oxford University Press on behalf of Royal Astronomical Society

Journal keyword(s): extraterrestrial intelligence - astrobiology - planets and satellites: dynamical evolution and stability - stars: evolution

Simbad objects: 1

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Number of rows : 1
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 TRAPPIST-1 LM* 23 06 29.3684948589 -05 02 29.037301866     18.798 16.466 14.024 M7.5e 1306 0

Query : 2023MNRAS.521.2002R

Basic data :
TRAPPIST-1 -- Low-mass Star
Other object types: otypes_help 		* (2017AJ,AP,...), IR (2MASSI,2MASSW), LM* (2000AJ), PM* (2006AJ), NIR (2MASS), MIR (WISEA)
ICRS coord. (ep=J2000) : 		23 06 29.3684948589 -05 02 29.037301866 (Optical) [ 0.0616 0.0536 90 ] A 2020yCat.1350....0G
FK4 coord. (ep=B1950 eq=1950) : 		23 03 51.0524178632 -05 18 18.821987388 [ 0.0616 0.0536 90 ]
Gal coord. (ep=J2000) : 		069.7127808375832 -56.6446053686932 [ 0.0616 0.0536 90 ]
Proper motions mas/yr : 		930.788 -479.038 [0.087 0.070 90] A 2020yCat.1350....0G
Radial velocity / Redshift / cz : 		V(km/s) -52.003101 [0.134416] / z(spectroscopic) -0.000173 [0.000000] / cz -52.00 [0.13]
   (NIR) A 2020AJ....160..120J
Parallaxes (mas): 		80.2123 [0.0716] A 2020yCat.1350....0G
Spectral type: 		M7.5e D 2000AJ....120.1085G
Fluxes (7) :
V 18.798 [0.082] C 2006AJ....132.1234C
R 16.466 [0.065] C 2006AJ....132.1234C
G 15.622554 [0.003093] C 2020yCat.1350....0G
I 14.024 [0.115] C 2006AJ....132.1234C
J 11.354 [0.022] C 2003yCat.2246....0C
H 10.718 [0.021] C 2003yCat.2246....0C
K 10.296 [0.023] C 2003yCat.2246....0C
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Hierarchy : number of linked objects
whatever the membership probability is (see description here ) :

: 8 		Display criteria :

Identifiers (16) :
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2MASS J23062928-0502285 EPIC 246199087 2MASSW J2306292-050227 TRAPPIST-1
AP J23062928-0502285 K2-112 2MUCD 12171 WISEA J230630.02-050234.1
CNS5 5691 Karmn J23064-050 TIC 278892590 Gaia DR3 2635476908753563008
EPIC 200164267 2MASSI J2306292-050227 TOI-6838 Gaia DR2 2635476908753563008

References (1306 between 1850 and 2026) (Total 1306)
Simbad bibliographic survey began in 1850 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system).
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Collections of Measurements Description of Measurements

Velocities : 5    Distance : 5    Var : 1    Fe/H : 3    Plx : 5    PM : 10    SpT : 3   

   

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Link by name to the catalogue in VizieR :

2MASS J23062928-0502285 AP J23062928-0502285 2MASSI J2306292-050227 WISEA J230630.02-050234.1 Gaia DR3 2635476908753563008
Gaia DR2 2635476908753563008

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