2019AJ....157...31Z


Query : 2019AJ....157...31Z

2019AJ....157...31Z - Astron. J., 157, 31-31 (2019/January-0)

HATS-70b: a 13 MJ brown dwarf transiting an A star.

ZHOU G., BAKOS G.A., BAYLISS D., BENTO J., BHATTI W., BRAHM R., CSUBRY Z., ESPINOZA N., HARTMAN J.D., HENNING T., JORDAN A., MANCINI L., PENEV K., RABUS M., SARKIS P., SUC V., DE VAL-BORRO M., RODRIGUEZ J.E., OSIP D., KEDZIORA-CHUDCZER L., BAILEY J., TINNEY C.G., DURKAN S., LAZAR J., PAPP I. and SARI P.

Abstract (from CDS):

We report the discovery of HATS-70b, a transiting brown dwarf at the deuterium burning limit. HATS-70b has a mass of Mp=12.9–1.6+1.8MJup and a radius of Rp=1.384–0.074+0.079RJup, residing in a close-in orbit with a period of 1.89 days. The host star is a M*=1.78±0.12M A star rotating at vsinI*=40.61–0.35+0.32kms–1, enabling us to characterize the spectroscopic transit of the brown dwarf via Doppler tomography. We find that HATS-70b, like other massive planets and brown dwarfs previously sampled, orbits in a low projected-obliquity orbit with λ=8.9–4.5^+5.6○^. The low obliquities of these systems is surprising given all brown dwarf and massive planets with obliquities measured orbit stars hotter than the Kraft break. This trend is tentatively inconsistent with dynamically chaotic migration for systems with massive companions, though the stronger tidal influence of these companions makes it difficult to draw conclusions on the primordial obliquity distribution of this population. We also introduce a modeling scheme for planets around rapidly rotating stars, accounting for the influence of gravity darkening on the derived stellar and planetary parameters.

Abstract Copyright: © 2019. The American Astronomical Society. All rights reserved.

Journal keyword(s): stars: individual: HATS-70 - techniques: spectroscopic - techniques: photometric

VizieR on-line data: <Available at CDS (J/AJ/157/31): table2.dat table4.dat>

Simbad objects: 25

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Number of rows : 25
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 KELT-1b Pl 00 01 26.9169325133 +39 23 01.782142922           ~ 96 0
3 HD 10069b Pl 01 37 25.0335097438 -45 40 40.376513381           ~ 318 1
4 BD+57 793b Pl 04 21 52.7044170433 +57 49 01.892074012           ~ 201 1
5 CoRoT-15b BD? 06 28 27.8204 +06 11 10.477   17.012 15.997 15.807   ~ 43 1
6 CoRoT-15 EB* 06 28 27.8224597512 +06 11 10.451925852   17.01 16.00 15.81 14.83 F7V 17 1
7 HATS-70 * 07 16 25.0880019528 -31 14 39.858342180   12.07 12.23     ~ 15 0
8 HATS-70b Pl 07 16 25.0880178844 -31 14 39.858560668           ~ 21 0
9 WASP-128 * 11 31 26.0933129952 -41 41 22.301154528   12.98 12.37 12.36 11.74 G0V 10 0
10 WASP-128b BD? 11 31 26.0933641458 -41 41 22.299023767           ~ 19 0
11 EPIC 201702477.01 Pl? 11 40 57.7884018605 +03 40 53.646730450           ~ 13 0
12 LP 563-38 EB* 15 46 04.3030642435 +04 41 30.066220912   17.1   15.0   M5.1 33 1
13 HD 147506b Pl 16 20 36.3579144486 +41 02 53.109043943           ~ 238 1
14 CoRoT-27b Pl 18 33 58.9993177726 +05 32 18.323225693           ~ 17 0
15 CoRoT-33b Pl? 18 38 33.9101911792 +05 37 28.787049157           ~ 19 0
16 Kepler-486b Pl 18 59 31.1991510825 +49 16 01.170776185           ~ 31 0
17 G 205-57C BD? 19 10 14.284032 +46 57 24.10632           ~ 36 0
18 EPIC 219388192.01 Pl? 19 17 34.0313669245 -16 52 17.793013971           ~ 19 0
19 Kepler-75b Pl 19 24 33.0185863758 +36 34 38.477482370           ~ 43 1
20 CoRoT-3b Pl 19 28 13.2642482783 +00 07 18.614302248           ~ 129 1
21 KOI-415b Pl? 19 33 13.4495838492 +41 36 22.965658614           ~ 37 0
22 Kepler-39 Ro* 19 47 50.4745594512 +46 02 03.499726272   14.9   14.43   F8V 49 1
23 Kepler-39b Pl 19 47 50.4745660177 +46 02 03.499173435           ~ 59 1
24 WASP-30b BD? 23 53 38.054 -10 07 05.12           ~ 41 1
25 WASP-30 * 23 53 38.0549675760 -10 07 05.095516692   12.15 11.91 11.51 10.83 F8V 35 0

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2022.12.06-08:13:18

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