2021AJ....161...97C


Query : 2021AJ....161...97C

2021AJ....161...97C - Astron. J., 161, 97-97 (2021/February-0)

TOI-811b and TOI-852b: new transiting brown dwarfs with similar masses and very different radii and ages from the TESS mission.

CARMICHAEL T.W., QUINN S.N., ZHOU G., GRIEVES N., IRWIN J.M., STASSUN K.G., VANDERBURG A.M., WINN J.N., BOUCHY F., BRASSEUR C.E., BRICENO C., CALDWELL D.A., CHARBONNEAU D., COLLINS K.A., COLON K.D., EASTMAN J.D., FAUSNAUGH M., FONG W., FURESZ G., HUANG C., JENKINS J.M., KIELKOPF J.F., LATHAM D.W., LAW N., LUND M.B., MANN A.W., RICKER G.R., RODRIGUEZ J.E., SCHWARZ R.P., SHPORER A., TENENBAUM P., WOOD M.L. and ZIEGLER C.

Abstract (from CDS):

We report the discovery of two transiting brown dwarfs (BDs), TOI-811b and TOI-852b, from NASA's Transiting Exoplanet Survey Satellite mission. These two transiting BDs have similar masses but very different radii and ages. Their host stars have similar masses, effective temperatures, and metallicities. The younger and larger transiting BD is TOI-811b at a mass of Mb = 59.9 ± 13.0MJ and radius of Rb = 1.26 ± 0.06RJ, and it orbits its host star in a period of P = 25.16551 ± 0.00004 days. We derive the host star's age of 93–29+61 Myr from an application of gyrochronology. The youth of this system, rather than external heating from its host star, is why this BD's radius is relatively large. This constraint on the youth of TOI-811b allows us to test substellar mass-radius evolutionary models at young ages where the radius of BDs changes rapidly. TOI-852b has a similar mass at Mb = 53.7 ± 1.4MJ but is much older (4 or 8 Gyr, based on bimodal isochrone results of the host star) and is also smaller with a radius of Rb = 0.83 ± 0.04RJ. TOI-852b's orbital period is P = 4.94561 ± 0.00008 days. TOI-852b joins the likes of other old transiting BDs that trace out the oldest substellar mass-radius evolutionary models where contraction of the BD's radius slows and approaches a constant value. Both host stars have a mass of M* = 1.32M ± 0.05 and differ in their radii, Teff, and [Fe/H], with TOI-811 having R* = 1.27 ± 0.09R, Teff = 6107 ± 77 K, and [Fe/H] = + 0.40 ± 0.09 and TOI-852 having R* = 1.71 ± 0.04R, Teff = 5768 ± 84 K, and [Fe/H] = + 0.33 ± 0.09. We take this opportunity to examine how TOI-811b and TOI-852b serve as test points for young and old substellar isochrones, respectively.

Abstract Copyright: © 2021. The American Astronomical Society. All rights reserved.

Journal keyword(s): Brown dwarfs - Radial velocity - Transit photometry - Spectroscopy - Photometry - Substellar companion stars

VizieR on-line data: <Available at CDS (J/AJ/161/97): table4.dat>

Simbad objects: 41

goto Full paper

goto View the references in ADS

Number of rows : 41
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-1b Pl 00 01 26.9169325133 +39 23 01.782142922           ~ 96 0
2 TOI-852b BD? 01 38 57.6639620046 -07 16 51.256349916           ~ 5 0
3 TOI-852 * 01 38 57.6640168536 -07 16 51.252425724   12.310 11.585 11.409   ~ 7 0
4 Cl Melotte 22 OpC 03 46 24 +24 06.8           ~ 3260 0
5 HD 274870B BD? 05 28 30.7098553322 -48 24 32.302778259           ~ 6 0
6 NAME Orion Nebula Cluster OpC 05 35.0 -05 29           ~ 2192 1
7 NAME 2M 0535-05 a Pl? 05 35 21.8463185314 -05 46 08.560286991           ~ 6 0
8 NAME 2M 0535-05 b Pl? 05 35 21.8463185314 -05 46 08.560286991           ~ 5 0
9 V* V2384 Ori EB* 05 35 21.8473218600 -05 46 08.571352260       19.21 17.28 M7 96 1
10 2MASS J05520724-3255263 * 05 52 07.2444035280 -32 55 26.304030768           ~ 1 0
11 TOI-811 * 05 52 07.2569772240 -32 55 30.663924456   11.960 11.308 11.373   ~ 7 0
12 TOI-811b BD? 05 52 07.2569953541 -32 55 30.663337365           ~ 9 0
13 UCAC4 286-008371 * 05 52 08.6770001376 -32 55 27.510042612       16.127   ~ 1 0
14 CoRoT-15b BD? 06 28 27.8204 +06 11 10.477   17.012 15.997 15.807   ~ 43 1
15 HATS-70b Pl 07 16 25.0880178844 -31 14 39.858560668           ~ 21 0
16 CD-41 3255B BD? 07 40 24.6582390859 -42 09 16.740639385           ~ 5 0
17 BD+13 1880B BD? 08 17 16.8973986331 +12 36 04.912283928           ~ 9 0
18 NGC 2632 OpC 08 40 13 +19 37.3           ~ 1434 0
19 IC 2391 OpC 08 41 10 -52 59.5           ~ 787 0
20 EPIC 211946007.01 Pl? 08 42 39.4400086116 +19 24 51.898666284           ~ 8 0
21 EPIC 212036875.01 Pl 08 58 45.6699859877 +20 52 08.784463659           ~ 9 0
22 LP 261-75 B BD* 09 51 05.49288 +35 58 02.1288           L6V 56 0
23 IC 2602 OpC 10 42 27 -64 25.6           ~ 633 0
24 WASP-128b BD? 11 31 26.0933641458 -41 41 22.299023767           ~ 19 0
25 EPIC 201702477.01 Pl? 11 40 57.7884018605 +03 40 53.646730450           ~ 13 0
26 2MASS J15104786-2818174 LM* 15 10 47.8572999576 -28 18 17.519894532           M8e 17 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 CoRoT-33b Pl? 18 38 33.9101911792 +05 37 28.787049157           ~ 19 0
31 Kepler-486b Pl 18 59 31.1991510825 +49 16 01.170776185           ~ 31 0
32 G 205-57C BD? 19 10 14.284032 +46 57 24.10632           ~ 36 0
33 NGC 6774 OpC 19 16 21 -16 20.0           ~ 151 0
34 EPIC 219388192.01 Pl? 19 17 34.0313669245 -16 52 17.793013971           ~ 19 0
35 CoRoT-3b Pl 19 28 13.2642482783 +00 07 18.614302248           ~ 129 1
36 KOI-415b Pl? 19 33 13.4495838492 +41 36 22.965658614           ~ 37 0
37 Kepler-492b Pl 19 41 59.1967192074 +42 32 16.400829033           ~ 37 0
38 Kepler-39b Pl 19 47 50.4745660177 +46 02 03.499173435           ~ 59 1
39 NGTS-7A * 23 30 05.2354214952 -38 58 11.470666584           ~ 7 0
40 NGTS-7Ab BD? 23 30 05.2358629579 -38 58 11.462828113           ~ 15 0
41 WASP-30b BD? 23 53 38.054 -10 07 05.12           ~ 41 1

To bookmark this query, right click on this link: simbad:objects in 2021AJ....161...97C and select 'bookmark this link' or equivalent in the popup menu


2022.12.06-09:04:47

© Université de Strasbourg/CNRS

    • Contact