2025MNRAS.538.3144C

Query : 2025MNRAS.538.3144C

2025MNRAS.538.3144C - Mon. Not. R. Astron. Soc., 538, 3144-3176 (2025/April-3)

The Gaia ultracool dwarf sample - VI. Spectral types and properties of 51 ultracool dwarfs.

CHENG G., JONES H.R.A., SMART R.L., MAROCCO F., COOPER W.J., BURGASSER A., BEAMIN J.C., PINFIELD D.J., GAGNE J. and MORANTA L.

Abstract (from CDS):

Near-infrared spectra from the IRTF/SpeX and Blanco/ARCoIRIS telescope/instrument combinations are used for spectroscopic classification, to measure radial velocities, and for the inference of astrophysical properties of 51 Gaia-selected nearby ultracool dwarfs. In this sample, 44 are newly classified in the near infrared. All but one of the UCDs are within 100 pc, and 37 lie within 50 pc. We find a total of 26 M-types, 24 L-types, and one T-type in our sample. The positions of the majority of the UCDs on colour-magnitude diagrams and with evolutionary cooling track plots indicate that they are largely old and stellar in nature. There are a few UCDs of particular interest which lie away from expected trends, highlighting potential young, binary, and thick disc/subdwarf UCDs. From spectral and kinematic analyses, we identify UCDs of particular interest for further investigation, including seven potentially young UCDs, three thick disc UCDs, one subdwarf, six wide binaries, and six unresolved binaries.

Abstract Copyright: © 2025 The Author(s). Published by Oxford University Press on behalf of Royal Astronomical Society.

Journal keyword(s): brown dwarfs - stars: late-type - stars: low mass

VizieR on-line data: <Available at CDS (J/MNRAS/538/3144): tabled1.dat fits/*>

Simbad objects: 165

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Number of rows : 165
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 2MASS J00062250+1300451 BD* 00 06 22.50744 +13 00 45.1836           L2 3 0
2 2MASS J00130931-0025521 LM* 00 13 09.3302143752 -00 25 51.898937016           M6.0V 14 0
3 2MASS J00164364+2304262 BD* 00 16 43.641 +23 04 26.25           T0 8 0
4 2MASS J00454267+3611406 BD* 00 45 42.67440 +36 11 40.6680           T5 9 0
5 2MASS J00552554+4130184 LM* 00 55 25.5477487536 +41 30 18.438655824           M8Ve: 9 0
6 2MASS J01294256-0823580 LM* 01 29 42.5730200712 -08 23 58.169980572       15.22   M5.0 12 0
7 2MASS J01383648-0322181 BD* 01 38 36.48216 -03 22 18.1308           T3 19 0
8 CD-32 828 PM* 02 13 53.6254326523 -32 02 28.471644047 12.985 11.822 10.324 9.323 8.148 M2Vk 76 0
9 DENIS J025503.3-470049 BD* 02 55 03.6927058871 -47 00 51.356903955     22.921 19.906 17.454 L9 170 0
10 2MASS J03452021+3217223 * 03 45 20.2056557208 +32 17 22.268799240           M4 4 0
11 Cl* Melotte 22 KPNO 2 BD* 03 45 43.1616128256 +25 40 23.239779672         17.36 L0V 136 0
12 2MASSI J0415195-093506 BD* 04 15 19.54368 -09 35 06.6732           T8.0 182 0
13 NAME CAS-TAU ASS MGr 04 16 +27.6           ~ 86 1
14 IRAS F04196+2638 Or* 04 22 47.8803302496 +26 45 52.873258716           M1 47 0
15 NAME Taurus Complex SFR 04 41.0 +25 52           ~ 4971 0
16 2MASS J04574602-0207179 BD* 04 57 46.02168 -02 07 17.9508           T2 11 0
17 2MASS J05085506+3319272 BD* 05 08 55.0581472745 +33 19 27.090775623           L2 11 0
18 2MASS J05151079+0613599 LM* 05 15 10.7935942584 +06 14 00.010025340           ~ 2 0
19 * 22 Aur * 05 23 22.8725714400 +28 56 12.339179844   6.42 6.46     B9Vs 49 0
20 2MASS J05265973-5026216 BD* 05 26 59.7493260408 -50 26 21.666568524           L3 8 0
21 HD 36381 * 05 28 21.5509789608 -53 53 07.104297192   7.98 7.99     A0V 13 0
22 2MASS J05422495+0041027 PM* 05 42 24.9452979447 +00 41 02.750524781           ~ 2 0
23 2MASS J05471454+0817569 * 05 47 14.5533504427 +08 17 57.060628870           ~ 5 0
24 HD 40814 * 06 01 30.3595177560 +04 54 46.327764672   9.11 9.04     A0V 13 0
25 HD 45357 * 06 26 58.8238881600 +00 50 27.755470788   6.711 6.678     A0V 46 0
26 HD 45105 * 06 27 50.9705383176 +47 24 17.725600908 6.410 6.510 6.550     A0V 54 0
27 LP 205-44 PM* 06 31 50.7381977376 +41 29 45.488163624   16.50   14.462   dM5.0 65 0
28 * 49 Aur * 06 35 12.0621641448 +28 01 20.318894148   5.248 5.260     A0Vnn 63 0
29 HD 46710 * 06 35 16.5726877416 +08 00 13.894377984   8.20 8.15     A1V 12 0
30 PM J06518+2712 PM* 06 51 48.3195366984 +27 12 06.506510724     11.875 11.415 10.154 K7e 16 0
31 BD+33 1505 PM* 07 19 31.2746924218 +32 49 48.339033877   10.58   9.513   M0V 109 0
32 WISE J072227.27-054029.9 BD* 07 22 27.9060 -05 40 33.577           T9 90 0
33 Gaia DR3 974639306231785344 PM* 07 23 33.6342131879 +46 22 44.809522696           ~ 2 0
34 BD+20 1790 BY* 07 23 43.5893479416 +20 24 58.650645816   11.08 10.001 9.43 8.522 K5e 101 0
35 2MASSI J0727182+171001 BD* 07 27 18.24600 +17 10 01.2072           T7.0 104 0
36 HD 62091 * 07 38 38.0214218184 -60 37 45.848493300   7.67 7.61     A0V 12 0
37 * 79 Gem * 07 45 09.3336196560 +20 18 57.771505116 6.520 6.530 6.540     A1V 39 0
38 PM J07529+1244 PM* 07 52 58.2046172160 +12 44 40.303083084     13.091 12.729   ~ 7 0
39 * 28 Lyn SB* 08 07 09.9491374488 +43 15 37.293362784 6.240 6.320 6.350     A1V 48 0
40 2MASS J08080189+3157054 LM* 08 08 01.8905139288 +31 57 05.088308940           ~ 9 0
41 HD 67959 * 08 10 58.8845204136 +14 37 46.105093920   6.217 6.207     A1V 50 0
42 2MASS J08111040+1855280 LM* 08 11 10.3762624344 +18 55 28.081892136           M11 7 0
43 2MASS J08173001-6155158 BD* 08 17 29.9988806950 -61 55 15.658625335           T6 40 0
44 2MASS J08195820-0335266 BD* 08 19 58.20648 -03 35 26.6460           T4 23 0
45 HD 71906 * 08 31 19.9662429960 +37 15 53.796537612   6.127 6.174     A0V 62 0
46 LP 258-34 LM* 08 32 47.3469455867 +35 38 57.374440216   19.5   17.1   ~ 7 0
47 2MASS J08350622+1953050 BD* 08 35 06.22944 +19 53 05.0532           L5 46 0
48 SDSS J083717.21-000018.0 BD* 08 37 17.192664 -00 00 20.67084           T1 57 0
49 HD 73687 * 08 39 14.9209270776 -12 44 14.909716896   6.66 6.64     A0V 17 0
50 HD 74721 HB* 08 45 59.2614567408 +13 15 48.591616392 8.88 8.75 8.72     A0V 166 0
51 SCR J0850-0318 PM* 08 50 08.6136909696 -03 18 26.192908008   12.49 11.661 11.214 9.77 dM0.5 13 0
52 2MASS J08500913-0318305 LM* 08 50 09.1207084704 -03 18 30.506899968           ~ 5 0
53 SDSS J090051.84+520512.1 LM* 09 00 51.8368012464 +52 05 12.241599576           M10 5 0
54 SDSS J091136.57+143244.4 LM* 09 11 36.5765980272 +14 32 44.883877488           M10 5 0
55 2MASS J09165708-1120597 LM* 09 16 57.0915221432 -11 21 00.197748112           M9.0 8 0
56 HD 80613 * 09 21 15.3464910984 +15 22 16.865808924   6.546 6.549     B9.5Vn 43 0
57 HD 82191 SB* 09 31 17.3863889592 +27 23 14.062247628   6.701 6.623     A1m+A4m 42 0
58 HD 83535 * 09 39 04.0898145552 -02 50 22.106691348   7.34 7.21     A1V 14 0
59 Gaia DR3 5661603972370860800 PM* 09 40 07.8964952759 -25 32 16.775155730           ~ 2 0
60 LSPM J0941+3315N LM* 09 41 11.8078794676 +33 15 13.024466830           ~ 7 0
61 LP 260-43 PM* 09 41 11.9684264024 +33 15 05.929126959   18.8   15.9   ~ 10 0
62 2MASS J09423249-2551378 PM* 09 42 32.4857500680 -25 51 37.868731236           ~ 4 0
63 HD 83869 ** 09 42 43.0941100464 +48 25 51.612099708 6.380 6.380 6.370     A1V 37 0
64 2MASS J09481259+5300387 BD* 09 48 12.5901205248 +53 00 38.626344720           L2 5 0
65 2MASSI J1010148-040649 BD* 10 10 14.80704 -04 06 49.9320           L6 73 0
66 2MASS J10133048-7246231 BD* 10 13 30.485 -72 46 23.11           sdL2? 7 0
67 HD 89239 Em* 10 18 10.5145865688 +27 24 55.723836672   6.498 6.523     A2VmB9.5p_lB 77 0
68 * mu. UMa SB* 10 22 19.7276765267 +41 29 58.337745272 6.53 4.64 3.05 1.76 0.80 M0III 331 0
69 2MASSW J1036530-344138 BD* 10 36 53.0605368096 -34 41 38.377435973           L6 30 0
70 HD 92245 * 10 38 50.4158001549 -12 26 37.046782978   6.023 6.045     A0V 47 0
71 HD 92678 * 10 41 30.3392124744 -35 43 52.060011852   6.842 6.804     A0V 16 0
72 2MASS J10440942+0429376 BD* 10 44 09.42360 +04 29 37.6980           L7 26 0
73 DENIS J104827.8-525418 BD* 10 48 27.8699501232 -52 54 18.122199084       19.965 17.25 L1.5 13 0
74 HD 95534 * 11 00 49.7750692296 -52 04 29.943098220   6.82 6.81     A0V 21 0
75 HD 95735 PM* 11 03 20.1948195942 +35 58 11.576182057 10.030 8.960 7.520 5.99 4.79 M2+V 795 0
76 * p05 Leo * 11 13 45.5531027136 -00 04 10.208010072   5.374 5.404     A0V 82 0
77 HD 98949 * 11 23 05.1301582464 -28 53 49.127191116   7.51 7.52     A0V 22 0
78 2MASS J11263718-2706470 LM* 11 26 37.1766628728 -27 06 46.957568760           ~ 4 0
79 V* HP UMa LP* 11 28 45.0646310232 +49 33 32.454854640   10.84 9.66     M6 19 0
80 HD 99966 * 11 30 29.8370585520 +48 56 08.557939932   7.33 7.39     A0V 53 0
81 HD 100417 * 11 33 22.6308953928 +02 27 49.943207952   8.07 8.03     A1Vas 15 0
82 2MASS J11432097+5324430 LM* 11 43 20.9374181256 +53 24 42.854722848           ~ 2 0
83 2MASS J11504305-2914488 LM* 11 50 43.0608780960 -29 14 48.912654372           ~ 6 0
84 2MASS J11525935+5901066 LM* 11 52 59.3612443800 +59 01 06.567611628           ~ 3 0
85 * gam UMa Em* 11 53 49.8473166 +53 41 41.135025 2.440 2.450 2.440 2.44 2.47 A0V 417 0
86 BD+37 2228 LP? 11 54 37.7367834480 +37 08 06.876758076   11.23 9.73 9.80   M4:III 7 0
87 2MASS J11581724+3817203 LM* 11 58 17.2502611561 +38 17 20.380787919           ~ 5 0
88 2MASS J11583104-0008491 LM* 11 58 31.0413890736 -00 08 49.552641312           M9.5 5 0
89 2MASS J12123389+0206280 LM* 12 12 33.8861122752 +02 06 28.035194256           M11e 7 0
90 LP 216-82 LM* 12 15 05.3286371376 +39 14 46.983321960   20.9   18.3   ~ 7 0
91 2MASS J12151828+0042579 BD? 12 15 18.2958327819 +00 42 57.775091375           ~ 4 0
92 NAME Ursa Major Moving Group MGr 12 32 +57.0           ~ 467 1
93 * q Vir PM* 12 33 46.7485436339 -09 27 07.478534302   5.45 5.48     B9V 79 0
94 HD 109615 * 12 35 47.3272995216 +39 41 01.320968760   7.246 7.275     A0V 50 0
95 V* R Vir Mi* 12 38 29.9338039680 +06 59 19.028080356 10.26 9.04 7.48 5.62 3.91 M3.5-7e 209 0
96 HD 110443 * 12 42 19.7227866072 -29 40 29.460954252   9.51 9.34     A0V 8 0
97 WISE J124332.17+600126.6 BD* 12 43 32.10254640 +60 01 26.5150560           L8gamma 9 1
98 BD+60 1417 PM* 12 43 33.2722368600 +60 00 52.703215884   10.310 9.364 9.277   K0 26 0
99 Gaia DR3 3705763723623026304 PM* 12 50 14.9067475079 +04 55 06.397951161           ~ 5 0
100 2MASS J12501559+0455065 BD? 12 50 15.6183993743 +04 55 06.337710584           M9 5 0
101 HD 111744 * 12 51 23.3269209792 +12 22 21.999139572   8.86 8.86     A0V 36 0
102 2MASS J12523834+0347351 LM* 12 52 38.3520234072 +03 47 35.344811688           M7 5 0
103 2MASS J13073376+0246048 PM* 13 07 33.7635226836 +02 46 04.854092106           ~ 8 0
104 2MASS J13134686+1404570 LM* 13 13 46.8822396120 +14 04 56.945627472           ~ 3 0
105 2MASS J13151905+3232031 LM* 13 15 19.0408727088 +32 32 03.033665700           ~ 5 0
106 LP 218-81 LM* 13 20 30.8195900256 +42 38 13.992968868   20.5   18.2   ~ 9 0
107 HD 116246 * 13 21 50.1494373624 +39 22 51.709481292   8.68 8.74     A1V 26 0
108 HD 116405 * 13 22 45.1228533984 +44 42 53.894434752   8.27 8.34     A0V 51 0
109 HD 119850 PM* 13 45 43.7755597223 +14 53 29.471707437 10.989 9.894 8.50 7.465 6.363 M2V 402 0
110 HD 121781 * 13 56 46.2115830816 +35 27 22.761336312   9.00 8.94     A1V 19 0
111 HD 121880 PM* 13 57 52.1210809392 +16 12 07.519530456   7.646 7.583     A0V 28 0
112 2MASS J14202611+3235543 LM* 14 20 26.1222353952 +32 35 54.285925380           ~ 3 0
113 UCAC4 614-050065 * 14 20 33.1229146418 +32 37 29.346435645   15.228 13.672 13.371   M1 3 0
114 LP 134-7 PM* 14 23 02.5734342958 +51 46 30.528973379   19.7   17.6   M7V 22 0
115 BD+09 2882A PM* 14 23 22.6954782600 +08 26 47.826605184   5.027 5.037     A0V 25 0
116 HD 127067 * 14 28 33.2931696096 +28 17 25.906498224   7.099 7.111     A1V 42 0
117 LP 271-25 LM* 14 28 43.2275214164 +33 10 39.259309081   21.2   17.8   M9Ve 262 0
118 HD 128039 * 14 33 23.4612849192 +44 19 53.862105648   9.44 9.27     A0V 28 0
119 HD 128998 * 14 38 15.2215216824 +54 01 24.025416240 5.830 5.830 5.830     A1V 66 0
120 Gaia DR3 1490058849451967744 PM* 14 41 48.7326958417 +42 17 47.706160098           ~ 2 0
121 G 239-25 PM* 14 42 21.5756362789 +66 03 20.844850251   12.43 10.708 10.383   M3V 89 0
122 * 109 Vir PM* 14 46 14.9234473441 +01 53 34.381780831 3.69 3.72 3.73 3.66 3.68 A0IIInn 346 0
123 2MASS J14520130+0931372 BD* 14 52 01.3314007992 +09 31 37.554921912           L0 8 0
124 2MASSW J1506544+132106 BD* 15 06 54.3299045806 +13 21 06.039351151           L3 116 0
125 SDSS J151456.86+354747.9 LM* 15 14 56.9096167056 +35 47 47.843721384           dC: 4 0
126 2MASS J15164153+2756269 LM* 15 16 41.5248333864 +27 56 27.013099092           ~ 3 0
127 2MASS J15365938+0646507 BD* 15 36 59.3890887528 +06 46 50.736374616           L2 6 0
128 2MASS J15444240-0435306 LM* 15 44 42.4030702968 -04 35 30.680722320           ~ 2 0
129 2MASS J15445518+3301447 LM* 15 44 55.2006490920 +33 01 44.819027004           M16 10 0
130 HD 140775 V*? 15 45 23.4787023144 +05 26 50.350020468 5.65 5.62 5.58 5.54 5.55 A0V 84 0
131 2MASS J16031590-5046292 * 16 03 15.9002490145 -50 46 29.264846314           ~ 1 0
132 HD 146802 * 16 20 36.0761136024 -51 00 35.724604752   8.88 8.81     A0V 5 0
133 2MASS J16241436+0029158 BD* 16 24 14.36712 +00 29 15.8172           T6V 162 0
134 Gaia DR3 5942058396163925376 PM* 16 28 36.1009877124 -46 52 51.893264205           ~ 2 0
135 HD 148573 * 16 29 09.5799196968 -05 27 04.037290560   8.90 8.64     A0V 17 0
136 2MASS J16322911+1904407 BD* 16 32 29.11416 +19 04 40.7136       22.42 19.98 L8V 145 0
137 2MASS J16375310+1813430 LM* 16 37 53.1171881232 +18 13 43.029860916           ~ 3 0
138 2MASS J16462325-2115064 PM* 16 46 23.2555068827 -21 15 06.880321449           ~ 3 0
139 HD 151681 * 16 50 24.6441946824 -38 02 54.436020972   8.46 8.32     A0V 19 0
140 2MASS J16541588-3818593 LM* 16 54 15.8746595971 -38 18 59.668538366           ~ 8 0
141 VB 8 LM* 16 55 35.2557374336 -08 23 40.753073075   18.7 16.916 14.566 12.24 M7Ve 457 0
142 2MASS J17005346-4048179 * 17 00 53.4534939532 -40 48 18.193521107           ~ 1 0
143 HD 154056 * 17 04 47.8274302848 -37 26 33.128464596   9.21 9.07     B9V 9 0
144 2MASS J17134048-3952120 LM* 17 13 40.4800389380 -39 52 11.869047641           ~ 6 0
145 HD 156653 * 17 18 04.9427402976 +17 19 04.382069304   6.002 5.992     A1V 46 0
146 HD 157734 * 17 25 51.4546115184 -20 46 48.284047956   9.18 8.97     A0V 11 0
147 HD 158261 SB* 17 26 46.1453093400 +34 41 44.883897900 5.87 5.93 5.94     A0V 62 0
148 2MASS J17373855+4705511 LM* 17 37 38.5689905463 +47 05 50.411197173           ~ 8 0
149 HD 162620 * 17 55 05.1455029992 -55 08 29.516425080   11.02 9.71     K0/3(III) 6 0
150 HD 174366 ** 18 47 40.1320186488 +49 04 29.477133228 6.740 6.730 6.670     A1V 35 0
151 2MASS J18474700-3419345 LM* 18 47 47.0166182424 -34 19 34.522564008           ~ 3 0
152 HD 180617 PM* 19 16 55.2565688720 +05 10 08.040554168 11.768 10.63 9.115 8.076 6.782 M3-V 475 0
153 HD 182985 * 19 28 46.8688715880 -36 00 00.934671348   7.58 7.46     A0V 21 0
154 LSPM J1938+4321 LM* 19 38 48.2358941952 +43 21 22.791281508   19.7   17.7   ~ 9 0
155 HD 193594 * 20 19 20.6884067304 +41 23 29.027087628   7.79 7.79     B9V 19 0
156 LP 395-8 C LM* 20 19 48.6246319896 +22 56 43.014295068           ~ 4 0
157 LP 395-8 A SB* 20 19 49.2635178936 +22 56 36.413383992           ~ 7 0
158 LP 395-8 ** 20 19 49.2660 +22 56 36.519       11.635   M3.0Ve 23 0
159 LP 395-8 B PM* 20 19 49.2757232424 +22 56 38.075216460           ~ 4 0
160 HD 201671 * 21 10 32.0858365752 +22 27 16.598897784   6.667 6.650     A1V 45 0
161 SIPS J2130-0845 BD* 21 30 44.6489028062 -08 45 20.574092550       19.784 17.351 L1 51 1
162 2MASSI J2158045-155009 BD* 21 58 04.5716969232 -15 50 09.793729140       20.771 18.582 L4 59 0
163 TRAPPIST-1 LM* 23 06 29.3684948589 -05 02 29.037301866     18.798 16.466 14.024 M7.5e 1306 0
164 NAME Carina-near Moving Group MGr ~ ~           ~ 118 0
165 NAME Octans-near MGr ~ ~           ~ 29 0

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