2015ApJ...807...78F


Query : 2015ApJ...807...78F

2015ApJ...807...78F - Astrophys. J., 807, 78 (2015/July-1)

Interplay of tidal evolution and stellar wind braking in the rotation of stars hosting massive close-in planets.

FERRAZ-MELLO S., TADEU DOS SANTOS M., FOLONIER H., CZISMADIA S., DO NASCIMENTO J.-D.Jr and PATZOLD M.

Abstract (from CDS):

This paper deals with the application of the creep tide theory (Ferraz-Mello) to the study of the rotation of stars hosting massive close-in planets. The stars have nearly the same tidal relaxation factors as gaseous planets and the evolution of their rotation is similar to that of close-in hot Jupiters: they tidally evolve toward a stationary solution. However, stellar rotation may also be affected by stellar wind braking. Thus, while the rotation of a quiet host star evolves toward a stationary attractor with a frequency () times the orbital mean motion of the companion, the continuous loss of angular momentum in an active star displaces the stationary solution toward slower values: active host stars with big close-in companions tend to have rotational periods longer than the orbital periods of their companions. The study of some hypothetical examples shows that, because of tidal evolution, the rules of gyrochronology cannot be used to estimate the age of one system with a large close-in companion, no matter if the star is quiet or active, if the current semimajor axis of the companion is smaller than 0.03-0.04 AU. Details on the evolution of the systems: CoRoT LRc06E21637, CoRoT-27, Kepler-75, CoRoT-2, CoRoT-18, CoRoT-14 and on hypothetical systems with planets of mass 1-4 in orbit around a star similar to the Sun are given.

Abstract Copyright:

Journal keyword(s): celestial mechanics - planet-star interactions - planetary systems - planets and satellites: dynamical evolution and stability - stars: rotation

Simbad objects: 20

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Number of rows : 20
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2023
#notes
1 KELT-1 * 00 01 26.9168207928 +39 23 01.784206464   11.23 10.63     ~ 46 0
2 CoRoT-15b BD? 06 28 27.8204 +06 11 10.477   17.012 15.997 15.807   ~ 43 1
3 CoRoT-15 EB* 06 28 27.8224597512 +06 11 10.451925852   17.01 16.00 15.81 14.83 F7V 17 1
4 CoRoT-18 * 06 32 41.3776636176 -00 01 53.725599732   15.8 15.00 14.9 14.05 ~ 42 2
5 CoRoT-18b Pl 06 32 41.3777044284 -00 01 53.725631349           ~ 36 1
6 CoRoT-21 * 06 44 12.6302250707 -00 17 56.987010804   16.66 15.84 15.61 14.99 G8V 13 1
7 CoRoT-14 * 06 53 41.8087553160 -05 32 09.683309760   16.891 16.033 16.03 14.91 ~ 24 2
8 HAT-P-20 PM* 07 27 39.9488720808 +24 20 11.516231112   12.58 11.35 11.00   K3V 61 1
9 HAT-P-21 * 11 25 05.9859193536 +41 01 40.664937216   12.56 11.46 11.71   G3 30 1
10 HD 147506 * 16 20 36.3576063720 +41 02 53.106772488   9.15 8.69     F8V 155 2
11 CoRoT-27b Pl 18 33 58.9993177726 +05 32 18.323225693           ~ 17 0
12 CoRoT-27 * 18 33 58.9993615272 +05 32 18.324717936           ~ 11 0
13 CoRoT-33 * 18 38 33.9102478176 +05 37 28.786272924   15.705   14.2 13.5 ~ 9 0
14 Kepler-75 Ro* 19 24 33.0185656152 +36 34 38.477691264   16.2   14.9   ~ 55 1
15 Kepler-75b Pl 19 24 33.0185863758 +36 34 38.477482370           ~ 43 1
16 CoRoT-2 * 19 27 06.4944378024 +01 23 01.359897468   13.422 12.568 12.204 11.49 G7V+K9V 234 2
17 CoRoT-2b Pl 19 27 06.4944821296 +01 23 01.357597206           ~ 218 1
18 NGC 6811 OpC 19 37 22 +46 22.7   7.47 6.8     ~ 320 0
19 NGC 6819 OpC 19 41 18 +40 11.4   8.21 7.3     ~ 561 0
20 Kepler-492 Ro* 19 41 59.1967605000 +42 32 16.400455944           ~ 41 1

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2022.11.30-19:25:22

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