2016ApJ...821...26B


Query : 2016ApJ...821...26B

2016ApJ...821...26B - Astrophys. J., 821, 26-26 (2016/April-2)

Dynamical constraints on the core mass of hot Jupiter HAT-P-13b.

BUHLER P.B., KNUTSON H.A., BATYGIN K., FULTON B.J., FORTNEY J.J., BURROWS A. and WONG I.

Abstract (from CDS):

HAT-P-13b is a Jupiter-mass transiting exoplanet that has settled onto a stable, short-period, and mildly eccentric orbit as a consequence of the action of tidal dissipation and perturbations from a second, highly eccentric, outer companion. Owing to the special orbital configuration of the HAT-P-13 system, the magnitude of HAT-P-13b's eccentricity (eb) is in part dictated by its Love number ({k}{{2}\}), which is in turn a proxy for the degree of central mass concentration in its interior. Thus, the measurement of eb constrains {k}{{2}\} and allows us to place otherwise elusive constraints on the mass of HAT-P-13b's core (Mcore,b). In this study we derive new constraints on the value of eb by observing two secondary eclipses of HAT-P-13b with the Infrared Array Camera on board the Spitzer Space Telescope. We fit the measured secondary eclipse times simultaneously with radial velocity measurements and find that eb = 0.00700 ± 0.00100. We then use octupole-order secular perturbation theory to find the corresponding {k}{{2}\}={0.31}_{-0.05}^{+0.08}. Applying structural evolution models, we then find, with 68% confidence, that Mcore,b is less than 25 Earth masses (M⊕). The most likely value is Mcore,b = 11 M⊕, which is similar to the core mass theoretically required for runaway gas accretion. This is the tightest constraint to date on the core mass of a hot Jupiter. Additionally, we find that the measured secondary eclipse depths, which are in the 3.6 and 4.5 µm bands, best match atmospheric model predictions with a dayside temperature inversion and relatively efficient day-night circulation.

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

Journal keyword(s): methods: data analysis - planets and satellites: atmospheres - planets and satellites: dynamical evolution and stability - planets and satellites: individual: HAT-P-13b - planets and satellites: interiors - techniques: photometric

Simbad objects: 14

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Number of rows : 14
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024
#notes
1 BD+50 1471b Pl 07 48 06.4723053776 +50 13 32.920598923           ~ 158 1
2 HAT-P-13 * 08 39 31.8072358440 +47 21 07.273799280   11.15 10.42 10.40   G4 135 2
3 HAT-P-13c Pl 08 39 31.8072358440 +47 21 07.273799280           ~ 51 1
4 HAT-P-13b Pl 08 39 31.8072358440 +47 21 07.273799280           ~ 114 1
5 Ross 905b Pl 11 42 11.0933350978 +26 42 23.650782778           ~ 805 1
6 CD-29 9873 * 12 42 28.4949559632 -30 38 23.529045948   12.36 11.63 11.39 10.78 G8V 63 1
7 HAT-P-3b Pl 13 44 22.5937349736 +48 01 43.205733624           ~ 99 1
8 HATS-7b Pl 13 55 25.6669039416 -21 12 27.724490244           ~ 35 0
9 HAT-P-44 * 14 12 34.5714083256 +47 00 53.044781616   13.2 13.21 12.83 12.31 ~ 24 1
10 HD 147506b Pl 16 20 36.3576063720 +41 02 53.106772488           ~ 253 1
11 HD 149026b Pl 16 30 29.6185771608 +38 20 50.308980864           ~ 348 1
12 HAT-P-46 * 18 01 46.6085289960 -02 58 15.458098944   12.9 11.94 11.62 11.07 ~ 24 1
13 HAT-P-45 * 18 17 29.5774338144 -03 22 51.737462436   13.7 12.79 12.32 11.68 F5 19 1
14 Kepler-424 Er* 19 54 29.9854950120 +48 34 38.802689796   15.326 14.521 14.317   ~ 55 0

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