2016AJ....152..127P

Query : 2016AJ....152..127P

2016AJ....152..127P - Astron. J., 152, 127-127 (2016/November-0)

HATS-18b: an extreme short-period massive transiting planet spinning up its star.

PENEV K., HARTMAN J.D., BAKOS G.A., CICERI S., BRAHM R., BAYLISS D., BENTO J., JORDAN A., CSUBRY Z., BHATTI W., DE VAL-BORRO M., ESPINOZA N., ZHOU G., MANCINI L., RABUS M., SUC V., HENNING T., SCHMIDT B., NOYES R.W., LAZAR J., PAPP I. and SARI P.

Abstract (from CDS):

We report the discovery by the HATSouth network of HATS-18b: a 1.980±0.077MJ, 1.337–0.049+0.102RJ planet in a 0.8378 day orbit, around a solar analog star (mass 1.037±0.047M☉ and radius 1.020–0.031+0.057R☉) with V=14.067±0.040 mag. The high planet mass, combined with its short orbital period, implies strong tidal coupling between the planetary orbit and the star. In fact, given its inferred age, HATS-18 shows evidence of significant tidal spin up, which together with WASP-19 (a very similar system) allows us to constrain the tidal quality factor for Sun-like stars to be in the range of 6.5\lesssimlog10(Q*/k2)\lesssim7 even after allowing for extremely pessimistic model uncertainties. In addition, the HATS-18 system is among the best systems (and often the best system) for testing a multitude of star-planet interactions, be they gravitational, magnetic, or radiative, as well as planet formation and migration theories.

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

Journal keyword(s): planetary systems - planets and satellites: detection - planets and satellites: gaseous planets - stars: individual: HATS-18 - stars: rotation - techniques: photometric - techniques: photometric

VizieR on-line data: <Available at CDS (J/AJ/152/127): table1.dat table2.dat>

Simbad objects: 19

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Number of rows : 19
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 KELT-1 EB* 00 01 26.9168207928 +39 23 01.784206464   11.23 10.63     F5 60 0
2 HD 10069 SB* 01 37 25.0332798696 -45 40 40.374717456   9.74 9.30     F6IV/V 230 1
3 HD 15082 EB* 02 26 51.0582618096 +37 33 01.736482032   8.41 8.14     kA5hA8mF4 198 1
4 Cl Melotte 22 OpC 03 46 24.2 +24 06 50           ~ 3434 0
5 Cl Melotte 25 OpC 04 29 47.3 +16 56 53           ~ 3074 0
6 M 37 OpC 05 52 17.8 +32 32 42   6.19 5.6     ~ 401 2
7 WASP-12b Pl 06 30 32.7966092352 +29 40 20.263502460           ~ 763 1
8 WASP-12 EB* 06 30 32.7966092352 +29 40 20.263502460   12.14 11.57     G0V 309 1
9 HD 50064 s*b 06 51 34.1059967736 +00 17 50.466003216 8.75 9.06 8.30 7.51 6.88 B5Ia+ 84 1
10 NGC 2323 OpC 07 02 44.2 -08 21 54           ~ 195 0
11 NGC 2632 OpC 08 40 13.0 +19 37 16           ~ 1564 0
12 NGC 2682 OpC 08 51 23.0 +11 48 50           ~ 2342 0
13 WASP-19 EB* 09 53 40.0765648584 -45 39 33.057187596   13.05 12.31 12.12 11.35 G8V 182 2
14 WASP-43 PM* 10 19 38.0088913464 -09 48 22.605801336   13.782 12.490 12.022 11.10 K7V 149 2
15 OGLE-TR 113 SB* 10 52 24.2810533560 -61 26 48.845675976     16.08 15.407 14.42 K 118 1
16 HATS-18 EB* 11 35 49.7771406312 -29 09 21.755012652   14.870 14.067     ~ 32 0
17 HATS-18b Pl 11 35 49.7771406312 -29 09 21.755012652           ~ 38 0
18 WASP-103 * 16 37 15.5765824488 +07 11 00.109678740     12.1     F8V 70 1
19 OGLE-TR 56 EB* 17 56 35.5016678064 -29 32 21.479240220     16.560 16.07 15.30 ~ 169 1

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