2021A&A...652A.127G


Query : 2021A&A...652A.127G

2021A&A...652A.127G - Astronomy and Astrophysics, volume 652A, 127-127 (2021/8-1)

Populating the brown dwarf and stellar boundary: Five stars with transiting companions near the hydrogen-burning mass limit.

GRIEVES N., BOUCHY F., LENDL M., CARMICHAEL T., MIRELES I., SHPORER A., McLEOD K.K., COLLINS K.A., BRAHM R., STASSUN K.G., GILL S., BOUMA L.G., GUILLOT T., COINTEPAS M., DOS SANTOS L.A., CASEWELL S.L., JENKINS J.M., HENNING T., NIELSEN L.D., PSARIDI A., UDRY S., SEGRANSAN D., EASTMAN J.D., ZHOU G., ABE L., AGABI A., BAKOS G., CHARBONNEAU D., COLLINS K.I., COLON K.D., CROUZET N., DRANSFIELD G., EVANS P., GOEKE R.F., HART R., IRWIN J.M., JENSEN E.L.N., JORDAN A., KIELKOPF J.F., LATHAM D.W., MARIE-SAINTE W., MEKARNIA D., NELSON P., QUINN S.N., RADFORD D.J., RODRIGUEZ D.R., ROWDEN P., SCHMIDER F.-X., SCHWARZ R.P., SMITH J.C., STOCKDALE C., SUAREZ O., TAN T.-G., TRIAUD A.H.M.J., WAALKES W. and WINGHAM G.

Abstract (from CDS):

We report the discovery of five transiting companions near the hydrogen-burning mass limit in close orbits around main sequence stars originally identified by the Transiting Exoplanet Survey Satellite (TESS) as TESS objects of interest (TOIs): TOI-148, TOI-587, TOI-681, TOI-746, and TOI-1213. Using TESS and ground-based photometry as well as radial velocities from the CORALIE, CHIRON, TRES, and FEROS spectrographs, we found the companions have orbital periods between 4.8 and 27.2 days, masses between 77 and 98MJup , and radii between 0.81 and 1.66 RJup . These targets have masses near the uncertain lower limit of hydrogen core fusion (∼73-96MJup ), which separates brown dwarfs and low-mass stars. We constrained young ages for TOI-587 (0.2±0.1Gyr) and TOI-681 (0.17±0.03Gyr) and found them to have relatively larger radii compared to other transiting companions of a similar mass. Conversely we estimated older ages for TOI-148 and TOI-746 and found them to have relatively smaller companion radii. With an effective temperature of 9800±200K, TOI-587 is the hottest known main-sequence star to host a transiting brown dwarf or very low-mass star. We found evidence of spin-orbit synchronization for TOI-148 and TOI-746 as well as tidal circularization for TOI-148. These companions add to the population of brown dwarfs and very low-mass stars with well measured parameters ideal to test formation models of these rare objects, the origin of the brown dwarf desert, and the distinction between brown dwarfs and hydrogen-burning main sequence stars.

Abstract Copyright: © ESO 2021

Journal keyword(s): brown dwarfs - stars: low-mass - binaries: eclipsing

VizieR on-line data: <Available at CDS (J/A+A/652/A127): table4.dat refs.dat>

Status at CDS : Tables of objects will be appraised for possible ingestion in SIMBAD.

Simbad objects: 61

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Number of rows : 61
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 2MASS J01400127-5431218 PM* 01 40 01.2538819392 -54 31 21.660241008   13.289 12.625     ~ 4 0
4 TOI-263.01 Pl? 02 28 25.9517900506 -25 05 50.539974594           ~ 9 0
5 GPX-1b Pl? 02 33 28.6057674360 +56 01 32.548681642           ~ 5 0
6 NAME TIC 220568520 b LM* 03 05 08.5401967140 -62 51 24.782474853           ~ 2 0
7 Cl Melotte 22 OpC 03 46 24 +24 06.8           ~ 3260 0
8 GSC 06465-00602 ** 04 48 23.3159534736 -24 50 16.879808400   14.052 13.605     ~ 9 0
9 TOI-694b LM* 05 09 32.0433967574 -64 01 34.303235465           ~ 3 0
10 HD 274870B BD? 05 28 30.7098553322 -48 24 32.302778259           ~ 6 0
11 GSC 06493-00315 ** 05 42 49.1144333592 -25 59 47.445947592   13.580 13.114     ~ 10 0
12 TOI-811b BD? 05 52 07.2569953541 -32 55 30.663337365           ~ 9 0
13 CD-57 1311A * 05 55 32.6884884960 -57 17 26.067451956   10.54 10.03 10.077   ~ 1 0
14 CoRoT-15b BD? 06 28 27.8204 +06 11 10.477   17.012 15.997 15.807   ~ 43 1
15 TOI-746 * 06 38 28.9990799544 -67 38 56.321760732   12.655 12.022 11.908   ~ 5 0
16 TOI-746.01 Pl? 06 38 28.9994837538 -67 38 56.319562707           ~ 2 0
17 HATS-70b Pl 07 16 25.0880178844 -31 14 39.858560668           ~ 21 0
18 CD-41 3255B BD? 07 40 24.6582390859 -42 09 16.740639385           ~ 5 0
19 TOI-681 * 07 51 34.7953558992 -60 24 44.778352608   11.275 10.951 10.990   ~ 9 0
20 TOI-681.01 Pl? 07 51 34.7957367085 -60 24 44.777299913           ~ 2 0
21 NGC 2516 OpC 07 58 06 -60 48.0           ~ 663 0
22 BD+13 1880B BD? 08 17 16.8973986331 +12 36 04.912283928           ~ 9 0
23 HD 74162 * 08 41 35.0485048464 -22 11 39.578280288   7.81 7.78     B9V 9 0
24 TOI-587b Pl? 08 41 35.0486575537 -22 11 39.574721391           ~ 2 0
25 EPIC 211946007.01 Pl? 08 42 39.4400086116 +19 24 51.898666284           ~ 8 0
26 EPIC 212036875.01 Pl 08 58 45.6699859877 +20 52 08.784463659           ~ 9 0
27 LP 261-75 B BD* 09 51 05.49288 +35 58 02.1288           L6V 56 0
28 TYC 6604-547-1 * 09 54 52.8927578544 -23 19 55.744444272   11.14 10.71     ~ 8 0
29 TOI-1213 PM* 10 52 47.9872493064 -67 23 16.133904168   12.166 11.334 11.184   ~ 4 0
30 TOI-1213.01 Pl? 10 52 47.9873255359 -67 23 16.132397612           ~ 1 0
31 V* V764 Car EB* 10 53 51.1166673312 -61 34 13.644573348     17.71   16.53 ~ 22 0
32 V* V816 Car EB* 11 06 51.0923613144 -61 11 10.465836036     16.161 16.07 15.05 FV+MV 30 1
33 NAME OGLE-TR 122B BD? 11 06 51.99 -60 51 45.7           ~ 20 1
34 WASP-128b BD? 11 31 26.0933641458 -41 41 22.299023767           ~ 19 0
35 EPIC 201702477.01 Pl? 11 40 57.7884018605 +03 40 53.646730450           ~ 13 0
36 CD-39 7570 SB* 12 19 21.0336457752 -39 51 25.585123356   11.10 10.32     K0V 17 0
37 EBLM J1431-11 EB* 14 31 52.1470814088 -11 18 40.439462148           ~ 5 0
38 LP 563-38 EB* 15 46 04.3030642435 +04 41 30.066220912   17.1   15.0   M5.1 33 1
39 UGCS J160339.22-185129.4 EB* 16 03 39.2319975144 -18 51 29.400368220           M2.5e 23 0
40 CoRoT-33b Pl? 18 38 33.9101911792 +05 37 28.787049157           ~ 19 0
41 Kepler-486b Pl 18 59 31.1991510825 +49 16 01.170776185           ~ 31 0
42 G 205-57C BD? 19 10 14.284032 +46 57 24.10632           ~ 36 0
43 EPIC 219388192.01 Pl? 19 17 34.0313669245 -16 52 17.793013971           ~ 19 0
44 KOI-607b LM* 19 19 14.1893586444 +40 36 57.043453992           ~ 15 0
45 KOI-362 EB* 19 23 59.2554767856 +37 11 57.177016728       13.78   ~ 33 2
46 2MASS J19265907+0029061 EB* 19 26 59.0803024320 +00 29 06.220432644   17.092 16.049 15.670 14.934 F+D 9 0
47 CoRoT-3b Pl 19 28 13.2642482783 +00 07 18.614302248           ~ 130 1
48 KOI-415b Pl? 19 33 13.4495838492 +41 36 22.965658614           ~ 37 0
49 2MASS J19350355+3631165 EB* 19 35 03.5536693080 +36 31 16.532966172           M 13 0
50 Kepler-492b Pl 19 41 59.1967192074 +42 32 16.400829033           ~ 37 0
51 KOI-686b Pl? 19 47 21.7811821610 +43 38 49.525665721           ~ 28 0
52 Kepler-39b Pl 19 47 50.4745660177 +46 02 03.499173435           ~ 60 1
53 TYC 500-1187-1 Ro* 20 17 35.8427243880 +02 15 51.096886272   11.83 11.39     ~ 5 0
54 TOI-1278b BD? 21 21 54.9403734715 +35 38 55.777318896           ~ 5 0
55 K2-76b Pl 22 28 25.3435227977 -06 05 12.005674156           ~ 5 0
56 TOI-148.01 Pl? 22 33 16.961736 -38 09 34.98732           ~ 2 0
57 TOI-148 SB* 22 33 16.9634109327 -38 09 34.979984920   12.848 12.313 12.377   ~ 1 0
58 1SWASP J230808.34+333803.9 EB* 23 08 08.3429939160 +33 38 03.955818408   11.23 10.66     ~ 17 0
59 NGTS-7Ab BD? 23 30 05.2358629579 -38 58 11.462828113           ~ 15 0
60 BD+29 4980 EB* 23 43 18.4165031376 +29 55 56.623055412   11.54 10.53 10.31   ~ 8 0
61 WASP-30b BD? 23 53 38.054 -10 07 05.12           ~ 41 1

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2022.12.10-03:02:25

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