2013MNRAS.433..457B

Query : 2013MNRAS.433..457B

2013MNRAS.433..457B - Mon. Not. R. Astron. Soc., 433, 457-497 (2013/July-3)

76 T dwarfs from the UKIDSS LAS: benchmarks, kinematics and an updated space density.

BURNINGHAM B., CARDOSO C.V., SMITH L., LEGGETT S.K., SMART R.L., MANN A.W., DHITAL S., LUCAS P.W., TINNEY C.G., PINFIELD D.J., ZHANG Z., MORLEY C., SAUMON D., ALLER K., LITTLEFAIR S.P., HOMEIER D., LODIEU N., DEACON N., MARLEY M.S., VAN SPAANDONK L., BAKER D., ALLARD F., ANDREI A.H., CANTY J., CLARKE J., DAY-JONES A.C., DUPUY T., FORTNEY J.J., GOMES J., ISHII M., JONES H.R.A., LIU M., MAGAZZU A., MAROCCO F., MURRAY D.N., ROJAS-AYALA B. and TAMURA M.

Abstract (from CDS):

We report the discovery of 76 new T dwarfs from the UKIRT Infrared Deep Sky Survey (UKIDSS) Large Area Survey (LAS). Near-infrared broad- and narrow-band photometry and spectroscopy are presented for the new objects, along with Wide-field Infrared Survey Explorer (WISE) and warm-Spitzer photometry. Proper motions for 128 UKIDSS T dwarfs are presented from a new two epoch LAS proper motion catalogue. We use these motions to identify two new benchmark systems: LHS 6176AB, a T8p+M4 pair and HD 118865AB, a T5.5+F8 pair. Using age constraints from the primaries and evolutionary models to constrain the radii, we have estimated their physical properties from their bolometric luminosity. We compare the colours and properties of known benchmark T dwarfs to the latest model atmospheres and draw two principal conclusions. First, it appears that the H - [4.5] and J - W2 colours are more sensitive to metallicity than has previously been recognized, such that differences in metallicity may dominate over differences in Teff when considering relative properties of cool objects using these colours. Secondly, the previously noted apparent dominance of young objects in the late-T dwarf sample is no longer apparent when using the new model grids and the expanded sample of late-T dwarfs and benchmarks. This is supported by the apparently similar distribution of late-T dwarfs and earlier type T dwarfs on reduced proper motion diagrams that we present. Finally, we present updated space densities for the late-T dwarfs, and compare our values to simulation predictions and those from WISE.

Abstract Copyright: © 2013 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society (2013)

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

VizieR on-line data: <Available at CDS (J/MNRAS/433/457): table1.dat table2.dat table3.dat table4.dat table5.dat>

CDS comments: p.473: BD+01 2930AB is a misprint for BD+01 2920AB. p.481: SDSS 1416+1338B is a misprint for SDSS 1416+1348B. HIP 73786B is GJ 576B in Simbad. LHS 2803B is WDS J13481-1345B in Simbad.

Simbad objects: 176

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Number of rows : 176
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 ULAS J000734.90+011247.1 BD* 00 07 34.90344 +01 12 47.1240           T7 2 0
2 * 54 Psc B BD* 00 39 18.9174 +21 15 16.309           T7.5 86 1
3 ULAS J092906.75+040957.7 BD* 00 41 11.2800000 +09 29 06.921360           T5.5 14 0
4 CFBDS J005910-011401 BD* 00 59 10.4899 -01 14 01.313           T9.0 43 0
5 ULAS J012735.66+153905.9 BD* 01 27 35.66064 +15 39 05.9040           T6.5 2 0
6 ULAS J012855.07+063357.0 BD* 01 28 55.06536 +06 33 56.9808           T6 3 0
7 ULAS J013017.79+080453.9 BD* 01 30 17.64018 +08 04 54.7488           T6 2 0
8 CFBDS J013302+023128 BD* 01 33 02.04787 +02 31 30.0056           T8.5 8 1
9 ULAS J013950.51+150307.6 BD* 01 39 50.51400 +15 03 07.6356           T7 2 0
10 SDSS J020013.35+090837.7 BD* 02 00 13.34976 +09 08 37.7304           T6 2 0
11 ULAS J022603.18+070231.4 BD* 02 26 03.18144 +07 02 31.3692           T7 1 0
12 ULAS J024557.88+065359.4 BD* 02 45 57.87648 +06 53 59.4024           T7 1 0
13 BRLT 50 BD* 02 55 45.28416 +06 16 55.7652           T6.0 4 0
14 CFBDS J030135-161418 BD* 03 01 35.16768 -16 14 17.8008           T7.0 7 0
15 2MASS J03255322+0425406 BD* 03 25 53.22288 +04 25 40.6920           T5.5 22 0
16 SDSS J032920.15+043024.3 BD* 03 29 20.15256 +04 30 24.3936           T5 4 0
17 NAME Taurus Complex SFR 04 41.0 +25 52           ~ 4971 0
18 BD+52 913 WD* 05 05 30.6180977592 +52 49 51.919301604 10.25 11.44 11.69 11.93 12.108 DA.8 1153 0
19 NAME Ori Trapezium OpC 05 35 16.5 -05 23 14           ~ 1708 1
20 2MASS J07290002-3954043 BD* 07 29 00.02496 -39 54 04.3992           T8pec 36 0
21 2MASS J07414920+2351275 BD* 07 41 49.20936 +23 51 27.5076           T5 21 0
22 ULAS J074502.79+233240.3 BD* 07 45 02.42370 +23 32 39.3411           T8.5 6 0
23 ULAS J074616.98+235532.2 BD* 07 46 16.97786 +23 55 33.2618           T7 1 0
24 ULAS J074720.07+245516.3 BD* 07 47 20.12849 +24 55 16.9037           T6.5 1 0
25 ULAS J075003.88+272545.4 BD* 07 50 03.44160 +27 25 43.2840           T8.5 15 0
26 2MASSI J0755480+221218 BD* 07 55 47.95488 +22 12 16.9416           T5.2 37 0
27 ULAS J075829.83+222526.7 BD* 07 58 29.89628 +22 25 27.2424           T6.5 5 0
28 ULAS J075937.75+185555.0 BD* 07 59 37.77738 +18 55 55.6367           T6 2 0
29 ULAS J080048.27+190823.8 BD? 08 00 48.31467 +19 08 23.8166           ~ 1 0
30 ULAS J080918.41+212615.2 BD* 08 09 18.355632 +21 26 14.55108           T8 2 0
31 BD+75 325 HS* 08 10 49.4903003712 +74 57 57.931973676 8.002 9.23 9.50 9.698 9.884 sdO5 267 0
32 ULAS J081110.86+252931.8 BD* 08 11 10.894848 +25 29 30.49692           T7 3 0
33 ULAS J081407.51+245200.9 BD* 08 14 07.53587 +24 52 00.9031           T5 1 0
34 ULAS J081507.26+271119.2 BD* 08 15 07.26144 +27 11 19.2480           T7 1 0
35 SDSS J081918.57+210311.2 BD* 08 19 18.60983 +21 03 12.1163           T6 8 0
36 ULAS J081948.09+073323.3 BD* 08 19 48.09120 +07 33 23.2452           T6p 5 0
37 ULAS J082155.56+250939.8 BD* 08 21 55.79389 +25 09 40.1726           T4.5 3 0
38 ULAS J082327.46+002424.4 BD* 08 23 27.46608 +00 24 24.3936           T4 2 0
39 ULAS J082707.67-020408.2 BD* 08 27 07.6574 -02 04 07.537           T5.5 10 0
40 2MASS J08304878+0128311 BD* 08 30 48.78360 +01 28 31.1520           T5.5 24 0
41 ULAS J083756.19-004156.0 BD* 08 37 56.18016 -00 41 56.0508           T3 2 0
42 ULAS J084036.72+075933.6 BD* 08 40 36.72528 +07 59 33.7488           T4.5 2 0
43 ULAS J084211.68+093611.9 BD* 08 42 11.66688 +09 36 11.8512           T5.5 3 0
44 ULAS J084743.93+035040.2 BD* 08 47 43.97698 +03 50 40.1574           T5.7: 2 0
45 ULAS J085139.03+005340.9 BD* 08 51 39.03192 +00 53 40.9416           T4 3 0
46 ULAS J085342.94+000651.8 BD* 08 53 42.93816 +00 06 51.8256           T6p 4 0
47 ULAS J090116.23-030635.0 BD* 09 01 16.2370 -03 06 33.467           T7.5 14 0
48 ULAS J091309.55-003136.9 BD? 09 13 09.55440 -00 31 36.9228           ~ 1 0
49 CFBDS J092250+152741 BD* 09 22 50.12 +15 27 41.4           T7.0 7 0
50 ULAS J092608.82+040239.7 BD* 09 26 08.81520 +04 02 39.6780           T6 2 0
51 ULAS J092624.76+071140.7 BD* 09 26 24.75528 +07 11 40.7796           T3.5 5 0
52 ULAS J092744.20+341308.7 BD* 09 27 44.20176 +34 13 08.6700           T5.5 4 0
53 ULAS J092926.44+110547.3 BD* 09 29 26.44248 +11 05 47.2668           T2 2 0
54 ULAS J093245.48+310206.4 BD* 09 32 45.50444 +31 02 06.4539           T2 1 0
55 ULAS J093829.28-001112.6 BD* 09 38 29.27664 -00 11 12.5916           T4.5 2 0
56 ULAS J093951.04+001653.6 BD* 09 39 51.04008 +00 16 53.5944           T5.5 2 0
57 ULAS J094331.49+085849.2 BD* 09 43 31.49424 +08 58 49.1232           T5p 2 0
58 ULAS J094349.60+094203.4 BD* 09 43 49.60248 +09 42 03.4632           T4.5p 2 0
59 SDSS J094516.17+075546.3 BD* 09 45 16.39464 +07 55 45.5844           T5 4 0
60 ULAS J094806.06+064805.0 BD* 09 48 05.9865 +06 48 06.691           T7.0 7 0
61 G 48-43B BD* 09 50 47.33040 +01 17 33.0068           T8p 20 1
62 G 48-43 PM* 09 50 49.5920658472 +01 18 13.628490426   15.2 13.88 12.4   dM4.0 27 0
63 ULAS J095429.91+062309.9 BD* 09 54 29.737824 +06 23 07.61496           T5 7 0
64 ULAS J095829.86-003932.0 BD* 09 58 29.85480 -00 39 31.9068           T5.5(N) 4 0
65 CFBDS J100113+022622 BD* 10 01 13.03800 +02 26 22.3980           T5.0 5 0
66 ULAS J100759.90-010031.1 BD* 10 07 59.91192 -01 00 31.2120           T5.5 4 0
67 ULAS J101243.53+102101.6 BD* 10 12 43.73108 +10 21 05.5216           T5.5 9 0
68 ULAS J101721.40+011817.9 BD* 10 17 21.40056 +01 18 17.9280           T8(N) 8 0
69 ULAS J101821.78+072547.1 BD* 10 18 21.78912 +07 25 47.1756           T5.0 8 0
70 ULAS J102144.87+054446.1 BD* 10 21 44.86872 +05 44 46.1184           T6 2 0
71 ULAS J102305.44+044739.2 BD* 10 23 05.43816 +04 47 39.1668           T6.5 1 0
72 ULAS J102940.52+093514.6 BD* 10 29 40.380048 +09 35 14.04060           T8 16 0
73 ULAS J103434.52-001553.0 BD* 10 34 34.53168 -00 15 52.9308           T6.5p 3 0
74 HD 92245 * 10 38 50.4158001549 -12 26 37.046782978   6.023 6.045     A0V 47 0
75 ULAS J104224.20+121206.8 BD* 10 42 24.19584 +12 12 06.8184           T7.5 3 0
76 TYC 842-1185-1 PM* 10 42 57.6516873792 +10 38 39.497029620   12.06 11.41     ~ 1 0
77 ULAS J104355.37+104803.4 BD* 10 43 55.30393 +10 48 04.3868           T8 4 0
78 ULAS J105134.32-015449.8 BD* 10 51 34.36666 -01 54 49.2500           T6 2 0
79 ULAS J105235.42+001632.7 BD* 10 52 35.56325 +00 16 34.8634           T5 2 0
80 ULAS J105334.64+015719.7 BD* 10 53 34.63560 +01 57 19.7208           T6.5 2 0
81 2MASS J11101001+0116130 BD* 11 10 10.01064 +01 16 13.0872           T5.5 86 0
82 ULAS J111127.77+051855.5 BD* 11 11 27.77208 +05 18 55.5372           T4.5 1 0
83 ULAS J114925.58-014343.2 BD* 11 49 25.58424 -01 43 43.1436           T5 2 0
84 ULAS J115038.79+094942.8 BD* 11 50 38.8310 +09 49 43.170           T6.5p 11 0
85 ULAS J115229.67+035927.2 BD* 11 52 29.89840 +03 59 29.3819           T6 6 0
86 ULAS J115239.93+113407.6 BD* 11 52 40.26646 +11 34 07.8260           T8.5 4 0
87 ULAS J115338.74-014724.1 BD* 11 53 38.73720 -01 47 24.1548           T6 5 0
88 ULAS J115508.39+044502.3 BD* 11 55 08.528760 +04 45 00.00900           T7 4 0
89 ULAS J115718.02-013923.9 BD* 11 57 18.02256 -01 39 23.8788           T5 2 0
90 SDSS J115759.08+092200.4 BD* 11 57 59.08848 +09 22 00.4548           T2.5 7 0
91 SDSS J120257.05+090158.8 BD* 12 02 57.05016 +09 01 58.8360           T5 5 0
92 SDSS J120444.89-015036.3 BD* 12 04 44.522520 -01 50 33.98028           T4.5 4 0
93 ULAS J120621.03+101802.9 BD* 12 06 21.12686 +10 18 00.8094           T5 1 0
94 ULAS J120744.65+133902.7 BD* 12 07 44.65200 +13 39 02.6928           T6 7 0
95 ULAS J121226.80+101007.4 BD* 12 12 26.93354 +10 10 07.6315           T5 1 0
96 ULAS J122343.35-013100.7 BD* 12 23 43.34736 -01 31 00.6636           T6 2 0
97 ULAS J123153.60+091205.4 BD* 12 31 53.60016 +09 12 05.4180           T4.5p 2 0
98 ULAS J123327.45+121952.2 BD* 12 33 27.44304 +12 19 52.1832           T3.5 6 0
99 BD+25 2534 HS* 12 37 23.5161671712 +25 03 59.867922240 9.117 10.26 10.59 10.642 10.809 sdB1(k) 268 0
100 ULAS J123828.51+095351.3 BD* 12 38 28.39680 +09 53 51.8089           T8.5(N) 18 0
101 ULAS J123903.75+102518.6 BD* 12 39 03.74400 +10 25 18.5412           T0 2 0
102 ULAS J124804.56+075904.0 BD* 12 48 04.55160 +07 59 04.0668           T7 4 0
103 ULAS J125446.35+122215.7 BD* 12 54 46.36032 +12 22 15.7289           T5.4: 2 0
104 ULAS J125708.07+110850.4 BD* 12 57 08.06976 +11 08 50.3160           T4.5 2 0
105 ULAS J125835.97+030736.1 BD* 12 58 35.97384 +03 07 36.0768           T5 1 0
106 ULAS J125939.44+293322.4 BD* 12 59 39.44112 +29 33 22.4388           T5 2 0
107 BD+13 2618C BD* 13 00 42.0799 +12 21 14.800         23.28 T8.5p 153 0
108 BD+13 2618 RS* 13 00 46.5566863405 +12 22 32.677229903 12.314 11.233 9.750 8.785 7.653 M0V 383 1
109 ULAS J130217.21+130851.2 BD* 13 02 17.20680 +13 08 51.1332           T8.5 18 0
110 ULAS J130227.54+143428.0 BD* 13 02 27.54144 +14 34 28.0272           T4.5 2 0
111 ULAS J130303.54+001627.7 BD* 13 03 03.54216 +00 16 27.7068           T5.5 5 0
112 TYC 884-458-1 PM* 13 14 51.9736542984 +08 21 33.055497972   10.59 9.89     ~ 4 0
113 ULAS J131508.42+082627.4 BD* 13 15 08.4453 +08 26 27.964           T7.5 13 0
114 ULAS J131943.77+120900.2 BD* 13 19 43.76130 +12 09 06.7051           T5p 6 0
115 ULAS J132048.12+102910.6 BD* 13 20 48.12216 +10 29 10.6224           T5 3 0
116 ULAS J132605.18+120009.9 BD* 13 26 05.18064 +12 00 09.9936           T6p 7 0
117 LP 498-8 PM* 13 34 05.8504965552 +11 23 51.875545416   20.0   18.2   ~ 3 0
118 ULAS J133502.11+150653.5 BD* 13 35 02.10744 +15 06 53.5032           T6 2 0
119 ULAS J133553.45+113005.2 BD* 13 35 53.5979 +11 30 07.151           T8.5 44 0
120 ULAS J133828.69-014245.4 BD* 13 38 28.69056 -01 42 45.4392           T7.5 1 0
121 ULAS J133933.64-005621.1 BD* 13 39 33.63552 -00 56 21.0984           T7 1 0
122 HD 118865 PM* 13 39 34.3256484408 +01 05 18.122763948   8.52 7.98     F7V 40 0
123 HD 118865B BD* 13 39 43.79136 +01 04 36.4224           T5 9 0
124 2MASS J13464634-0031501 BD* 13 46 46.34496 -00 31 50.1312           T6 86 0
125 LP 738-14 B BD* 13 48 02.90808 -13 44 07.1664           T5.5 15 0
126 ULAS J134940.81+091833.3 BD* 13 49 40.81296 +09 18 33.4836           T7 4 0
127 ULAS J135607.41+085345.2 BD* 13 56 07.40520 +08 53 45.2076           T5 2 0
128 ULAS J141623.94+134836.3 BD* 14 16 23.94216 +13 48 36.3204           T7.5p 64 0
129 ULAS J141756.22+133045.8 BD* 14 17 56.25640 +13 30 45.4756           T5 7 0
130 ULAS J142145.63+013619.0 BD* 14 21 45.63120 +01 36 18.9972           T4.5 1 0
131 HD 126053 PM* 14 23 15.2847745835 +01 14 29.641269692 6.98 6.90 6.27 5.71 5.39 G1.5V 442 0
132 HD 126053B BD* 14 23 20.79 +01 16 38.2           T8 32 0
133 ULAS J142536.35+045132.3 BD* 14 25 36.34824 +04 51 32.2560           T6.5 2 0
134 ULAS J144458.87+105531.1 BD* 14 44 58.87104 +10 55 31.0872           T5 2 0
135 ULAS J144555.24+125735.1 BD* 14 45 55.24200 +12 57 35.0748           T6.5 3 0
136 SDSS J144901.97+114712.3 BD* 14 49 01.96848 +11 47 12.3504           T5 11 0
137 ULAS J145243.59+065542.9 BD* 14 52 43.57968 +06 55 42.9168           T4.5 5 0
138 GJ 570 D BD* 14 57 14.96256 -21 21 47.7504           T8 242 1
139 LSPM J1459+0851 WD? 14 59 32.0670831696 +08 51 25.860049020   19.8   18.8   ~ 16 0
140 LSPM J1459+0857B BD* 14 59 35.24616 +08 57 51.1632         17.92 T4.5 17 0
141 ULAS J150135.33+082215.2 BD* 15 01 35.32920 +08 22 15.2148           T4.5 4 0
142 CFBDS J150411+102717 BD* 15 04 11.5912 +10 27 20.068           T7.0 29 0
143 BD+06 2986 PM* 15 04 53.5261634600 +05 38 17.160679455 12.262 11.13 9.815 8.998 8.257 K8V 107 0
144 BD+06 2986B BD* 15 04 57.390096 +05 37 57.41508         23.85 sdT5.5 26 0
145 ULAS J150547.89+070316.6 BD* 15 05 47.89656 +07 03 16.6680           T4 3 0
146 ULAS J151637.89+011050.1 BD* 15 16 37.89408 +01 10 50.0772           T6.5 3 0
147 ULAS J151721.12+052929.0 BD* 15 17 21.14875 +05 29 27.2108           T8 12 0
148 ULAS J152526.25+095814.3 BD* 15 25 26.25408 +09 58 14.2824           T6.5 3 0
149 CFBDS J152655+034536 BD* 15 26 55.77552 +03 45 34.8336           T4.0 3 0
150 ULAS J152912.23+092228.5 BD* 15 29 12.23496 +09 22 28.4772           T6 4 0
151 ULAS J153406.06+055643.9 BD* 15 34 06.06264 +05 56 43.8900           T5 2 0
152 ULAS J153653.80+015540.6 BD* 15 36 53.89774 +01 55 40.8329           T5 1 0
153 ULAS J154427.34+081926.6 BD* 15 44 27.34296 +08 19 26.6268           T3.5 4 0
154 ULAS J154701.84+005320.3 BD* 15 47 01.84176 +00 53 20.3820           T5.5 6 0
155 ULAS J154914.45+262145.6 BD* 15 49 14.54483 +26 21 43.5121           T5 3 0
156 ULAS J160143.75+264623.4 BD* 16 01 43.77456 +26 46 23.7740           T6.5 1 0
157 ULAS J161436.96+244230.1 BD* 16 14 37.03520 +24 42 29.8052           T7 2 0
158 ULAS J161710.39+235031.4 BD* 16 17 10.49326 +23 50 30.8946           T6 2 0
159 ULAS J161934.78+235829.3 BD* 16 19 34.83744 +23 58 29.1834           T6 2 0
160 ULAS J161938.12+300756.4 BD* 16 19 38.11667 +30 07 58.5078           T5 2 0
161 ULAS J162655.04+252446.8 BD* 16 26 55.05672 +25 24 47.0862           T5 2 0
162 SDSS J163931.44+323213.3 BD* 16 39 31.41213 +32 32 13.7597           T3 2 0
163 M 13 GlC 16 41 41.634 +36 27 40.75     5.8     ~ 2291 0
164 WISE J182831.08+265037.7 BD* 18 28 30.30897 +26 50 36.0751           Y0 76 0
165 ULAS J211616.26-010124.3 BD* 21 16 16.26288 -01 01 24.2832           T6 2 0
166 Wolf 940 B BD* 21 46 38.4345 -00 10 34.714           T8.5 62 0
167 ULAS J223728.91+064220.1 BD* 22 37 28.90752 +06 42 20.1024           T6.5 2 0
168 ULAS J230049.08+070338.0 BD* 23 00 49.07952 +07 03 37.9728           T4.5 2 0
169 ULAS J231536.93+034422.7 BD* 23 15 36.93360 +03 44 22.6896           T7 1 0
170 ULAS J231856.24+043328.5 BD* 23 18 56.23920 +04 33 28.5372           T7.5 1 0
171 ULAS J232600.40+020139.2 BD* 23 26 00.19938 +02 01 38.1701           T8 8 0
172 ULAS J232624.07+050931.6 BD* 23 26 24.06504 +05 09 31.6008           T5.1: 2 0
173 ULAS J233104.12+042652.6 BD* 23 31 04.12056 +04 26 52.5804           T4 1 0
174 ULAS J234228.96+085620.1 BD* 23 42 29.080512 +08 56 19.88628           T6.5 12 0
175 ULAS J235204.62+124444.9 BD* 23 52 04.62456 +12 44 44.9232           T6.5 2 0
176 ULAS J235715.98+013240.3 BD* 23 57 15.98352 +01 32 40.3476           T5.5 1 0

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