2017MNRAS.470.2054C


C.D.S. - SIMBAD4 rel 1.7 - 2020.11.29CET01:02:39

2017MNRAS.470.2054C - Mon. Not. R. Astron. Soc., 470, 2054-2068 (2017/September-2)

Dynamical tides in exoplanetary systems containing hot Jupiters: confronting theory and observations.

CHERNOV S.V., IVANOV P.B. and PAPALOIZOU J.C.B.

Abstract (from CDS):

We study the effect of dynamical tides associated with the excitation of gravity waves in an interior radiative region of the central star on orbital evolution in observed systems containing hot Jupiters. We consider WASP-43, OGLE-TR-113, WASP-12 and WASP-18 that contain stars on the main sequence (MS). For these systems there are observational estimates regarding the rate of change of the orbital period. We also investigate Kepler-91 that contains an evolved giant star. We adopt the formalism of Ivanov et al. for calculating the orbital evolution. For the MS stars we determine expected rates of orbital evolution under different assumptions about the amount of dissipation acting on the tides, estimate the effect of stellar rotation for the two most rapidly rotating stars and compare results with observations. All cases apart from possibly WASP-43 are consistent with a regime in which gravity waves are damped during their propagation over the star. However, at present this is not definitive as observational errors are large. We find that although it is expected to apply to Kepler-91, linear radiative damping cannot explain this dissipation regime applying to MS stars. Thus, a non-linear mechanism may be needed. Kepler-91 is found to be such that the time-scale for evolution of the star is comparable to that for the orbit. This implies that significant orbital circularization may have occurred through tides acting on the star. Quasi-static tides, stellar winds, hydrodynamic drag and tides acting on the planet have likely played a minor role.

Abstract Copyright: © 2017 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): hydrodynamics - celestial mechanics - planet-star interactions - binaries: close - stars: oscillations - planetary systems - planetary systems

Simbad objects: 12

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Number of rows : 12

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 10069 * 01 37 25.0335097438 -45 40 40.376513381   9.74 9.30     F6IV/V 160 1
2 HD 10069b Pl 01 37 25.0335097438 -45 40 40.376513381           ~ 235 1
3 HD 32518 PM* 05 09 36.7200880014 +69 38 21.855089289 8.550 7.530 6.420     K1III 43 1
4 HD 32518b Pl 05 09 36.7200880014 +69 38 21.855089289           ~ 10 1
5 WASP-12 ** 06 30 32.7966788910 +29 40 20.266334158   12.14 11.57     G0V 237 2
6 WASP-12b Pl 06 30 32.7966788910 +29 40 20.266334158           G0 572 1
7 WASP-43b Pl 10 19 38.0089444408 -09 48 22.603103969           ~ 216 1
8 WASP-43 PM* 10 19 38.0089444408 -09 48 22.603103969   13.4 12.4 12.08 11.10 K7V 87 1
9 OGLE-TR 113 SB* 10 52 24.2808297652 -61 26 48.845891762     16.08 15.41 14.42 K 112 1
10 NAME OGLE-TR-113b Pl 10 52 24.2808297652 -61 26 48.845891762           ~ 113 1
11 Kepler-91 RG* 19 02 41.4979092591 +44 07 00.239792240           K1IV 62 1
12 Kepler-91b Pl 19 02 41.4979092591 +44 07 00.239792240           ~ 60 1

    Equat.    Gal    SGal    Ecl

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2020.11.29-01:02:39

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