2015MNRAS.450.2486C

Query : 2015MNRAS.450.2486C

2015MNRAS.450.2486C - Mon. Not. R. Astron. Soc., 450, 2486-2499 (2015/July-1)

49 new T dwarfs identified using methane imaging.

CARDOSO C.V., BURNINGHAM B., SMART R.L., VAN SPAANDONK L., BAKER D., SMITH L.C., ZHANG Z.H., ANDREI A.H., BUCCIARELLI B., DHITAL S., JONES H.R.A., LATTANZI M.G., MAGAZZU A., PINFIELD D.J. and TINNEY C.G.

Abstract (from CDS):

We present the discovery of 49 new photometrically classified T dwarfs from the combination of large infrared and optical surveys combined with follow-up Telescopio Nazionale Galileo photometry. We used multiband infrared and optical photometry from the United Kingdom Infrared Telescope and Sloan Digital Sky Surveys to identify possible brown dwarf candidates, which were then confirmed using methane filter photometry. We have defined a new photometric conversion between CH4s - CH4l colour and spectral type for T4-T8 brown dwarfs based on a part of the sample that has been followed up using methane photometry and spectroscopy. Using methane differential photometry as a proxy for spectral type for T dwarfs has proved to be a very efficient technique. Of a subset of 45 methane selected brown dwarfs that were observed spectroscopically, 100 per cent were confirmed as T dwarfs. Future deep imaging surveys will produce large samples of faint brown dwarf candidates, for which spectroscopy will not be feasible. When broad wavelength coverage is unavailable, methane imaging offers a means to efficiently classify candidates from such surveys using just a pair of near-infrared images.

Abstract Copyright: © 2015 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society (2015)

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

Simbad objects: 96

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Number of rows : 96
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 J000010.43+113602.2 BD* 00 00 10.43 +11 36 02.2           T1.5: 1 0
2 ULAS J000734.90+011247.1 BD* 00 07 34.90344 +01 12 47.1240           T7 2 0
3 ULAS J002740.95+085940.3 BD* 00 27 40.95 +08 59 40.3           T3.9: 1 0
4 ULAS J004030.42+091524.9 BD* 00 40 30.41784 +09 15 24.8832           T4.5 2 0
5 ULAS J092906.75+040957.7 BD* 00 41 11.2800000 +09 29 06.921360           T5.5 14 0
6 ULAS J010324.69+092746.5 BD* 01 03 24.69 +09 27 46.5           T6.1: 1 0
7 ULAS J010557.68+034643.6 BD* 01 05 57.68 +03 46 43.6           T4.0: 1 0
8 ULAS J011438.94+085420.8 BD* 01 14 38.94 +08 54 20.8           T5.6: 1 0
9 ULAS J012735.66+153905.9 BD* 01 27 35.66064 +15 39 05.9040           T6.5 2 0
10 ULAS J012855.07+063357.0 BD* 01 28 55.06536 +06 33 56.9808           T6 3 0
11 ULAS J013017.79+080453.9 BD* 01 30 17.64018 +08 04 54.7488           T6 2 0
12 ULAS J013950.51+150307.6 BD* 01 39 50.51400 +15 03 07.6356           T7 2 0
13 ULAS J014022.04+123756.9 BD* 01 40 22.04 +12 37 56.9           T5.6: 1 0
14 ULAS J014443.27+014741.0 BD* 01 44 43.27008 +01 47 41.0316           T5 2 0
15 SDSS J020013.35+090837.7 BD* 02 00 13.34976 +09 08 37.7304           T6 2 0
16 ULAS J020543.26+084340.2 BD* 02 05 43.26 +08 43 40.2           T8.1: 1 0
17 ULAS J021750.35+035803.3 BD* 02 17 50.35 +03 58 03.3           T6.2: 1 0
18 ULAS J023144.49+063602.2 BD* 02 31 44.49 +06 36 02.2           T2.8: 1 0
19 ULAS J032524.61+051039.5 BD* 03 25 24.61 +05 10 39.5           T5.8: 1 0
20 HD 42581B BD* 06 10 34.80 -21 52 00.0           T6.5 549 0
21 ULAS J074502.79+233240.3 BD* 07 45 02.42370 +23 32 39.3411           T8.5 6 0
22 ULAS J075937.75+185555.0 BD* 07 59 37.77738 +18 55 55.6367           T6 2 0
23 ULAS J081110.86+252931.8 BD* 08 11 10.894848 +25 29 30.49692           T7 3 0
24 ULAS J083408.92+040728.7 BD* 08 34 08.92 +04 07 28.7           T4.8: 1 0
25 ULAS J084743.93+035040.2 BD* 08 47 43.97698 +03 50 40.1574           T5.7: 2 0
26 ULAS J091804.71+043949.6 BD* 09 18 04.71 +04 39 49.6           T2.8: 1 0
27 ULAS J092608.82+040239.7 BD* 09 26 08.81520 +04 02 39.6780           T6 2 0
28 ULAS J092608.93+020807.3 BD* 09 26 08.93 +02 08 07.3           T5.0: 1 0
29 ULAS J092744.20+341308.7 BD* 09 27 44.20176 +34 13 08.6700           T5.5 4 0
30 ULAS J095429.91+062309.9 BD* 09 54 29.737824 +06 23 07.61496           T5 7 0
31 ULAS J102144.87+054446.1 BD* 10 21 44.86872 +05 44 46.1184           T6 2 0
32 ULAS J102940.52+093514.6 BD* 10 29 40.380048 +09 35 14.04060           T8 16 0
33 ULAS J104224.20+121206.8 BD* 10 42 24.19584 +12 12 06.8184           T7.5 3 0
34 ULAS J104355.37+104803.4 BD* 10 43 55.30393 +10 48 04.3868           T8 4 0
35 ULAS J105134.32-015449.8 BD* 10 51 34.36666 -01 54 49.2500           T6 2 0
36 ULAS J105334.64+015719.7 BD* 10 53 34.63560 +01 57 19.7208           T6.5 2 0
37 ULAS J110242.39+012021.9 BD* 11 02 42.39 +01 20 21.9           T3.8: 1 0
38 LP 551-66 PM* 11 07 04.7345195664 +04 09 07.792859232           dM2 5 0
39 LP 551-67 WD* 11 07 04.7663907720 +04 09 10.825227360           DA2.3 18 0
40 2MASS J11101001+0116130 BD* 11 10 10.01064 +01 16 13.0872           T5.5 86 0
41 ULAS J112059.41+121904.5 BD* 11 20 59.40768 +12 19 04.4832           T4.5 2 0
42 ULAS J112327.02+150059.4 BD* 11 23 27.02 +15 00 59.4           T4.9: 1 0
43 ULAS J113716.54+112657.2 BD* 11 37 16.54 +11 26 57.2           T5.1: 1 0
44 SDSS J114340.50+061358.8 BD* 11 43 40.51024 +06 13 58.7427           T4.3: 3 0
45 ULAS J115229.67+035927.2 BD* 11 52 29.89840 +03 59 29.3819           T6 6 0
46 ULAS J115533.45-001329.8 BD* 11 55 33.45 -00 13 29.8           T3.8: 1 0
47 ULAS J120948.38+035338.4 BD* 12 09 48.38 +03 53 38.4           T4.8: 1 0
48 ULAS J122343.35-013100.7 BD* 12 23 43.34736 -01 31 00.6636           T6 2 0
49 ULAS J122633.36+152106.9 BD* 12 26 33.36 +15 21 06.9           T3.4: 1 0
50 ULAS J124639.33+032314.3 BD* 12 46 39.35726 +03 23 14.8745           T5 3 0
51 LSPM J1247+0646 WD* 12 47 39.1272104568 +06 46 04.304355463   20.2   18.5   DQpec 23 1
52 PSO J192.5647+26.4796 BD* 12 50 15.93917 +26 28 52.6955           T6.5 11 0
53 ULAS J125359.78+265855.5 BD* 12 53 59.78 +26 58 55.5           T4.5: 1 0
54 ULAS J125446.35+122215.7 BD* 12 54 46.36032 +12 22 15.7289           T5.4: 2 0
55 ULAS J125939.44+293322.4 BD* 12 59 39.44112 +29 33 22.4388           T5 2 0
56 ULAS J130154.79+064747.9 BD* 13 01 54.79 +06 47 47.9           T6.0: 1 0
57 ULAS J130227.54+143428.0 BD* 13 02 27.54144 +14 34 28.0272           T4.5 2 0
58 ULAS J130444.26+310112.3 BD* 13 04 44.26 +31 01 12.3           T7.0: 1 0
59 ULAS J130716.63+332523.8 BD* 13 07 16.63 +33 25 23.8           T5.0: 1 0
60 ULAS J131304.03+225919.7 BD* 13 13 04.03 +22 59 19.7           T5.7: 1 0
61 ULAS J131313.57+265433.8 BD* 13 13 13.57 +26 54 33.8           T4.6: 1 0
62 ULAS J131610.28+075553.0 BD* 13 16 10.28 +07 55 53.0           sdT6.5 13 0
63 ULAS J131615.93+331306.8 BD* 13 16 15.92616 +33 13 06.7620           T5.7: 2 0
64 ULAS J132125.90+073549.4 BD* 13 21 25.90 +07 35 49.4           T6.2: 1 0
65 ULAS J133502.11+150653.5 BD* 13 35 02.10744 +15 06 53.5032           T6 2 0
66 2MASS J13375038+2636512 BD* 13 37 50.38728 +26 36 51.2100           T5 9 0
67 ULAS J134646.71+282009.2 BD* 13 46 46.70808 +28 20 09.2184           T5.1: 2 0
68 ULAS J134926.40+234045.9 BD* 13 49 26.403 +23 40 45.91           T7.9 1 0
69 HD 120751 Em* 13 51 02.8883390112 +23 45 45.294967080   10.84 8.80     K4V 26 0
70 ULAS J135322.83+283408.2 BD* 13 53 22.83 +28 34 08.2           T7.2: 1 0
71 ULAS J141520.66+041647.1 BD* 14 15 20.66 +04 16 47.1           T6.1: 1 0
72 ULAS J141756.22+133045.8 BD* 14 17 56.25640 +13 30 45.4756           T5 7 0
73 ULAS J142007.60+021818.3 BD* 14 20 07.60 +02 18 18.3           T6.0: 1 0
74 ULAS J142536.35+045132.3 BD* 14 25 36.34824 +04 51 32.2560           T6.5 2 0
75 SDSS J144901.97+114712.3 BD* 14 49 01.96848 +11 47 12.3504           T5 11 0
76 ULAS J151637.89+011050.1 BD* 15 16 37.89408 +01 10 50.0772           T6.5 3 0
77 ULAS J153406.06+055643.9 BD* 15 34 06.06264 +05 56 43.8900           T5 2 0
78 ULAS J153608.64+030556.5 BD* 15 36 08.64 +03 05 56.5           T3.5: 1 0
79 ULAS J154427.34+081926.6 BD* 15 44 27.34296 +08 19 26.6268           T3.5 4 0
80 ULAS J154914.45+262145.6 BD* 15 49 14.54483 +26 21 43.5121           T5 3 0
81 ULAS J161436.96+244230.1 BD* 16 14 37.03520 +24 42 29.8052           T7 2 0
82 ULAS J161710.39+235031.4 BD* 16 17 10.49326 +23 50 30.8946           T6 2 0
83 ULAS J161934.78+235829.3 BD* 16 19 34.83744 +23 58 29.1834           T6 2 0
84 ULAS J161938.12+300756.4 BD* 16 19 38.11667 +30 07 58.5078           T5 2 0
85 2MASS J16241436+0029158 BD* 16 24 14.36712 +00 29 15.8172           T6V 162 0
86 ULAS J211317.05+001840.7 BD* 21 13 17.05 +00 18 40.7           T4.6: 1 0
87 ULAS J211616.26-010124.3 BD* 21 16 16.26288 -01 01 24.2832           T6 2 0
88 ULAS J213352.64-010343.4 BD* 21 33 52.64 -01 03 43.4           T4.4: 1 0
89 WISEP J222623.05+044003.9 BD* 22 26 23.06256 +04 40 04.1196           T8 17 0
90 ULAS J223917.13+073416.0 BD* 22 39 17.13 +07 34 16.0           T5.5: 1 0
91 ULAS J225023.52-001605.9 BD? 22 50 23.52240 -00 16 05.9340           ~ 1 0
92 ULAS J225540.22+061412.9 BD* 22 55 40.22 +06 14 12.9           T5.8: 1 0
93 ULAS J230049.08+070338.0 BD* 23 00 49.07952 +07 03 37.9728           T4.5 2 0
94 ULAS J232600.40+020139.2 BD* 23 26 00.19938 +02 01 38.1701           T8 8 0
95 ULAS J232624.07+050931.6 BD* 23 26 24.06504 +05 09 31.6008           T5.1: 2 0
96 ULAS J235204.62+124444.9 BD* 23 52 04.62456 +12 44 44.9232           T6.5 2 0

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