2020AJ....159..151S


Query : 2020AJ....159..151S

2020AJ....159..151S - Astron. J., 159, 151-151 (2020/April-0)

TOI-503: the first known brown-dwarf Am-star binary from the TESS mission.

SUBJAK J., SHARMA R., CARMICHAEL T.W., JOHNSON M.C., GONZALES E.J., MATTHEWS E., BOFFIN H.M.J., BRAHM R., CHATURVEDI P., CHAKRABORTY A., CIARDI D.R., COLLINS K.A., ESPOSITO M., FRIDLUND M., GAN T., GANDOLFI D., GARCIA R.A., GUENTHER E., HATZES A., LATHAM D.W., MATHIS S., MATHUR S., PERSSON C.M., RELLES H.M., SCHLIEDER J.E., BARCLAY T., DRESSING C.D., CROSSFIELD I., HOWARD A.W., RODLER F., ZHOU G., QUINN S.N., ESQUERDO G.A., CALKINS M.L., BERLIND P., STASSUN K.G., BLAZEK M., SKARKA M., SPOKOVA M., ZAK J., ALBRECHT S., SOBRINO R.A., BECK P., CABRERA J., CARLEO I., COCHRAN W.D., CSIZMADIA S., DAI F., DEEG H.J., DE LEON J.P., EIGMULLER P., ENDL M., ERIKSON A., FUKUI A., GEORGIEVA I., GONZALEZ-CUESTA L., GRZIWA S., HIDALGO D., HIRANO T., HJORTH M., KNUDSTRUP E., KORTH J., LAM K.W.F., LIVINGSTON J.H., LUND M.N., LUQUE R., MONTANES RODRIGUEZ P., MURGAS F., NARITA N., NESPRAL D., NIRAULA P., NOWAK G., PALLE E., PATZOLD M., PRIETO-ARRANZ J., RAUER H., REDFIELD S., RIBAS I., SMITH A.M.S., VAN EYLEN V. and KABATH P.

Abstract (from CDS):

We report the discovery of an intermediate-mass transiting brown dwarf (BD), TOI-503b, from the TESS mission. TOI-503b is the first BD discovered by TESS, and it has circular orbit around a metallic-line A-type star with a period of P = 3.6772 ± 0.0001 days. The light curve from TESS indicates that TOI-503b transits its host star in a grazing manner, which limits the precision with which we measure the BD's radius (Rb=1.34–0.15+0.26RJ). We obtained high-resolution spectroscopic observations with the FIES, Ondrejov, PARAS, Tautenburg, and TRES spectrographs, and measured the mass of TOI-503b to be Mb = 53.7 ± 1.2 MJ. The host star has a mass of M* = 1.80 ± 0.06 M, a radius of R* = 1.70 ± 0.05R, an effective temperature of Teff = 7650 ± 160 K, and a relatively high metallicity of 0.61 ± 0.07 dex. We used stellar isochrones to derive the age of the system to be ∼180 Myr, which places its age between that of RIK 72b (a ∼10 Myr old BD in the Upper Scorpius stellar association) and AD 3116b (a ∼600 Myr old BD in the Praesepe cluster). Given the difficulty in measuring the tidal interactions between BDs and their host stars, we cannot precisely say whether this BD formed in situ or has had its orbit circularized by its host star over the relatively short age of the system. Instead, we offer an examination of plausible values for the tidal quality factor for the star and BD. TOI-503b joins a growing number of known short-period, intermediate-mass BDs orbiting main-sequence stars, and is the second such BD known to transit an A star, after HATS-70b. With the growth in the population in this regime, the driest region in the BD desert (35–55MJsini) is reforesting.

Abstract Copyright: © 2020. The American Astronomical Society. All rights reserved.

Journal keyword(s): Brown dwarfs - Stellar ages - Am stars - Spectroscopy - Transit photometry - Radial velocity - Stellar rotation - Stellar astronomy

Simbad objects: 51

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Number of rows : 51
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 15082 dS* 02 26 51.0582618096 +37 33 01.736482032   8.41 8.14     kA5hA8mF4 175 1
4 HD 15082b Pl 02 26 51.0582746497 +37 33 01.737746137           ~ 292 1
5 NAME 2M 0535-05 b Pl? 05 35 21.8463185314 -05 46 08.560286991           ~ 5 0
6 NAME 2M 0535-05 a Pl? 05 35 21.8463185314 -05 46 08.560286991           ~ 6 0
7 V* V2384 Ori EB* 05 35 21.8473218600 -05 46 08.571352260       19.21 17.28 M7 96 1
8 CoRoT-15b BD? 06 28 27.8204 +06 11 10.477   17.012 15.997 15.807   ~ 43 1
9 CoRoT-15 EB* 06 28 27.8224597512 +06 11 10.451925852   17.01 16.00 15.81 14.83 F7V 17 1
10 HATS-70 * 07 16 25.0880019528 -31 14 39.858342180   12.07 12.23     ~ 15 0
11 HATS-70b Pl 07 16 25.0880178844 -31 14 39.858560668           ~ 21 0
12 NAME BD+07 1721Ab Pl 07 26 02.2900046477 +07 36 56.814398692           ~ 17 0
13 BD+07 1721 ** 07 26 02.2901761080 +07 36 56.815027668   10.21 9.86     A8V+G9V/K1V 16 0
14 BD+13 1880 SB* 08 17 16.8973753152 +12 36 04.908944304   9.842 9.610 9.516   ~ 7 0
15 BD+13 1880B BD? 08 17 16.8973986331 +12 36 04.912283928           ~ 9 0
16 NGC 2632 OpC 08 40 13 +19 37.3           ~ 1434 0
17 Cl* NGC 2632 HSHJ 430 EB* 08 42 39.4398272616 +19 24 51.898641012           M3.9 31 0
18 EPIC 211946007.01 Pl? 08 42 39.4400086116 +19 24 51.898666284           ~ 8 0
19 TYC 1400-1873-1 * 08 58 45.6699076392 +20 52 08.782143780   11.65 10.95     ~ 5 0
20 EPIC 212036875.01 Pl 08 58 45.6699859877 +20 52 08.784463659           ~ 9 0
21 LP 261-75 LM* 09 51 04.5755715720 +35 58 09.461810208   16.1   14.2   M4.5Ve 43 0
22 LP 261-75 B BD* 09 51 05.49288 +35 58 02.1288           L6V 56 0
23 WASP-128 * 11 31 26.0933129952 -41 41 22.301154528   12.98 12.37 12.36 11.74 G0V 10 0
24 WASP-128b BD? 11 31 26.0933641458 -41 41 22.299023767           ~ 19 0
25 UCAC2 33047398 * 11 40 57.7883247720 +03 40 53.646749112   15.272 14.569 14.606   ~ 13 0
26 EPIC 201702477.01 Pl? 11 40 57.7884018605 +03 40 53.646730450           ~ 13 0
27 LP 563-38 EB* 15 46 04.3030642435 +04 41 30.066220912   17.1   15.0   M5.1 33 1
28 UGCS J160339.22-185129.4 EB* 16 03 39.2319975144 -18 51 29.400368220           M2.5e 23 0
29 NAME Upper Sco Association As* 16 12 -23.4           ~ 1236 1
30 * alf Lyr dS* 18 36 56.33635 +38 47 01.2802 0.03 0.03 0.03 0.07 0.10 A0Va 2615 0
31 CoRoT-33b Pl? 18 38 33.9101911792 +05 37 28.787049157           ~ 19 0
32 CoRoT-33 * 18 38 33.9102478176 +05 37 28.786272924   15.705   14.2 13.5 ~ 9 0
33 Kepler-486b Pl 18 59 31.1991510825 +49 16 01.170776185           ~ 31 0
34 Kepler-486 Ro* 18 59 31.1991605400 +49 16 01.172404596           ~ 44 0
35 G 205-57C BD? 19 10 14.284032 +46 57 24.10632           ~ 36 0
36 G 205-57 EB* 19 10 14.284032 +46 57 24.10632   14.93 13.38 13.01   M+M 54 0
37 EPIC 219388192.01 Pl? 19 17 34.0313669245 -16 52 17.793013971           ~ 19 0
38 UCAC4 366-166973 ** 19 17 34.0314284136 -16 52 17.793243804   13.28 12.54 12.39   ~ 28 0
39 * b Aql PM* 19 24 58.1999714302 +11 56 39.888480530 6.35 5.93   4.7   G7IVHdel1 474 0
40 CoRoT-3 EB* 19 28 13.2642131544 +00 07 18.613986132   14.199 13.292 13.099 12.54 F3V 73 1
41 CoRoT-3b Pl 19 28 13.2642482783 +00 07 18.614302248           ~ 129 1
42 KOI-415 Ro* 19 33 13.4494812696 +41 36 22.965562764           ~ 41 0
43 KOI-415b Pl? 19 33 13.4495838492 +41 36 22.965658614           ~ 37 0
44 Kepler-492b Pl 19 41 59.1967192074 +42 32 16.400829033           ~ 37 0
45 Kepler-492 Ro* 19 41 59.1967605000 +42 32 16.400455944           ~ 41 1
46 Kepler-39 Ro* 19 47 50.4745594512 +46 02 03.499726272   14.9   14.43   F8V 49 1
47 Kepler-39b Pl 19 47 50.4745660177 +46 02 03.499173435           ~ 59 1
48 NGTS-7A * 23 30 05.2354214952 -38 58 11.470666584           ~ 7 0
49 NGTS-7Ab BD? 23 30 05.2358629579 -38 58 11.462828113           ~ 15 0
50 WASP-30b BD? 23 53 38.054 -10 07 05.12           ~ 41 1
51 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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2022.11.30-12:23:28

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