2009A&A...497..619Z

Query : 2009A&A...497..619Z

2009A&A...497..619Z - Astronomy and Astrophysics, volume 497619-633 (2009/4-2)

Ultra-cool dwarfs: new discoveries, proper motions, and improved spectral typing from SDSS and 2MASS photometric colors.

ZHANG Z.H., POKORNY R.S., JONES H.R.A., PINFIELD D.J., CHEN P.S., HAN Z., CHEN D., GALVEZ-ORTIZ M.C. and BURNINGHAM B.

Abstract (from CDS):

We try to identify ultra-cool dwarfs from the seventh Data Release of the Sloan Digital Sky Survey (SDSS DR7) with SDSS i-z and r-z colors. We also obtain proper motion data from SDSS, 2MASS, and UKIDSS and improve spectral typing from SDSS and 2MASS photometric colors. We selected ultra-cool dwarf candidates from the SDSS DR7 with new photometric selection criteria, which are based on a parameterization study of known L and T dwarfs. The objects are then cross-identified with the Two Micron All Sky Survey and the Fourth Data Release of the UKIRT Infrared Deep Sky Survey (UKIDSS DR4). We derive proper motion constraints by combining SDSS, 2MASS, and UKIDSS positional information. In this way we are able to assess, to some extent, the credence of our sample using a multi epoch approach, which complements spectroscopic confirmation. Some of the proper motions are affected by short baselines, but, as a general tool, this method offers great potential to confirm faint L dwarfs as UKIDSS coverage increases. In addition we derive updated color-spectral type relations for L and T dwarfs with SDSS and 2MASS magnitudes. We present 59 new nearby M and L dwarfs selected from the imaging catalog of the SDSS DR7, including proper motions and spectral types calculated from the updated color-spectral type relations. and obtain proper motions from SDSS, 2MASS, and UKIDSS for all of our objects.

Abstract Copyright: ∼

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

VizieR on-line data: <Available at CDS (J/A+A/497/619): table7.dat>

Simbad objects: 191

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Number of rows : 191
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 J00475962+1353318 BD? 00 47 59.626 +13 53 31.89           ~ 1 0
2 2MASS J01071863+1326565 BD* 01 07 18.70464 +13 26 56.1588           L0 5 0
3 2MASS J01205253+1518277 BD* 01 20 52.53336 +15 18 27.7092           L0.0 4 0
4 2MASS J01514102-0051564 BD? 01 51 41.0447507064 -00 51 56.427413508           ~ 4 0
5 2MASS J02292794-0053282 BD? 02 29 27.94920 -00 53 28.2660           L? 8 0
6 HD 42581B BD* 06 10 34.80 -21 52 00.0           T6.5 549 0
7 2MASS J07324179+2645593 BD? 07 32 41.792 +26 45 59.32           ~ 1 0
8 2MASS J07381307+1553050 BD? 07 38 13.074 +15 53 05.09           ~ 1 0
9 2MASS J07415115+2758375 BD? 07 41 51.15408 +27 58 37.5348           ~ 2 0
10 2MASS J07443602+2513304 BD? 07 44 36.025 +25 13 30.48           ~ 1 0
11 2MASS J07483864+1743329 BD* 07 48 38.642 +17 43 33.00           L5 5 0
12 2MASS J07525673+1734341 BD? 07 52 56.737 +17 34 34.18           ~ 2 0
13 2MASS J07563524+3630338 LM* 07 56 35.2496589816 +36 30 33.699644568           ~ 2 0
14 2MASS J07575274+0914103 BD* 07 57 52.750 +09 14 10.31           L3.7:V 4 0
15 2MASS J07575414+2216051 LM* 07 57 54.16728 +22 16 04.9188           M13 3 0
16 2MASS J07592306+4620072 BD? 07 59 23.063 +46 20 07.23           ~ 1 0
17 2MASS J08002037+3606273 BD? 08 00 20.376 +36 06 27.36           ~ 1 0
18 2MASS J08013865+3722059 BD? 08 01 38.6219284320 +37 22 05.824573608           ~ 1 0
19 2MASS J08025274+0510583 BD? 08 02 52.745 +05 10 58.35           ~ 1 0
20 2MASS J08032279+1238458 BD* 08 03 22.79594 +12 38 45.8233           L3 5 0
21 2MASS J08121593+5047590 BD? 08 12 15.936 +50 47 59.02           ~ 1 0
22 2MASS J08130398+2433563 BD? 08 13 03.98280 +24 33 56.3580           ~ 2 0
23 2MASS J08140916+2819100 BD? 08 14 09.16464 +28 19 10.0272           ~ 2 0
24 2MASS J08140946+2602508 BD? 08 14 09.46224 +26 02 50.8164           ~ 2 0
25 2MASS J08182574+3741029 BD? 08 18 25.743 +37 41 02.90           ~ 1 0
26 2MASS J08184366+1756453 BD? 08 18 43.662 +17 56 45.33           ~ 1 0
27 2MASS J08190553+4931192 BD? 08 19 05.536 +49 31 19.29           ~ 1 0
28 2MASS J08195144+5431558 BD? 08 19 51.447 +54 31 55.88           ~ 1 0
29 2MASS J08205931+2806482 BD? 08 20 59.31192 +28 06 48.2580           ~ 2 0
30 2MASS J08221377+5101201 LM* 08 22 13.77528 +51 01 20.1036           M10 3 0
31 2MASS J08330141+4451083 BD? 08 33 01.417 +44 51 08.37           ~ 1 0
32 2MASS J08361347+0221062 PM* 08 36 13.4859886176 +02 21 06.230735460           ~ 5 0
33 2MASS J08401643+5430019 BD* 08 40 16.43280 +54 30 01.9908           L1 6 0
34 2MASS J08453780+2931375 BD? 08 45 37.80792 +29 31 37.5168           ~ 2 0
35 2MASS J08473746+4624435 BD? 08 47 37.464 +46 24 43.59           ~ 1 0
36 2MASS J08475022+5108460 BD? 08 47 50.228 +51 08 46.08           ~ 1 0
37 2MASS J08475148+0138110 BD* 08 47 51.48960 +01 38 11.0724           L3.2V 5 0
38 2MASS J08483885+4840257 BD? 08 48 38.856 +48 40 25.73           ~ 1 0
39 2MASS J08504898+1732099 BD? 08 50 48.986 +17 32 09.91           ~ 1 0
40 2MASS J08511761+5832267 BD? 08 51 17.619 +58 32 26.74           ~ 1 0
41 SIMP J0851197+104347 BD* 08 51 19.77552 +10 43 47.0352           L3.0 3 1
42 2MASS J08571139+4159294 BD? 08 57 11.393 +41 59 29.40           ~ 1 0
43 2MASS J09002367+2539345 BD* 09 00 23.67336 +25 39 34.5562           L6.7V 9 0
44 2MASS J09030814+1659358 BD* 09 03 08.149 +16 59 35.89           T0pec 4 0
45 2MASS J09032093+5040505 LM* 09 03 20.9278549992 +50 40 50.652891840           M9 2 0
46 2MASS J09034756+0114462 BD* 09 03 47.55984 +01 14 46.1112           L3 5 0
47 2MASS J09043601+3229180 BD? 09 04 36.014 +32 29 18.02           ~ 1 0
48 2MASS J09054654+5623117 BD* 09 05 46.5422803944 +56 23 11.809636944           L5 27 0
49 2MASS J09142866+2305409 BD? 09 14 28.660 +23 05 40.96           ~ 1 0
50 2MASS J09171476+3148249 BD* 09 17 14.76264 +31 48 24.8256           L1 5 0
51 2MASS J09181190+3902168 BD* 09 18 11.83704480 +39 02 16.9003320           L 2 0
52 2MASS J09181601+4813004 LM* 09 18 15.9548546880 +48 13 00.082121196           M10 3 0
53 2MASS J09274580+0106402 BD? 09 27 45.800 +01 06 40.26           ~ 1 0
54 2MASS J09275243+5729322 BD? 09 27 52.436 +57 29 32.29           ~ 1 0
55 2MASS J09281983+1805104 BD? 09 28 19.833 +18 05 10.41           ~ 1 0
56 2MASS J09310073+6055395 BD? 09 31 00.736 +60 55 39.54           ~ 1 0
57 2MASS J09320398+3459380 BD? 09 32 03.984 +34 59 38.03           ~ 1 0
58 2MASS J09395619+2426597 BD? 09 39 56.192 +24 26 59.73           ~ 1 0
59 2MASS J09414642+2158439 BD? 09 41 46.422 +21 58 43.97           ~ 1 0
60 2MASS J09442733+6410372 BD* 09 44 27.2965822920 +64 10 37.624694304           L0 3 0
61 2MASS J09442960+4652548 BD? 09 44 29.602 +46 52 54.88           ~ 1 0
62 2MASS J09462438+3446397 BD? 09 46 24.387 +34 46 39.74           ~ 1 0
63 2MASS J09515423+2820408 BD? 09 51 54.235 +28 20 40.82           ~ 1 0
64 2MASS J09593276+4523309 BD* 09 59 32.76648 +45 23 30.9732           L3-4 12 0
65 2MASS J09594149+1141461 BD? 09 59 41.49624 +11 41 46.1256           ~ 2 0
66 2MASS J10001708+3218306 BD* 10 00 17.08368 +32 18 30.6216           L2 5 0
67 2MASS J10013231+4928198 BD? 10 01 32.313 +49 28 19.89           ~ 1 0
68 2MASS J10031729+3319218 BD? 10 03 17.295 +33 19 21.89           ~ 1 0
69 2MASS J10043591+5657572 BD* 10 04 35.91866 +56 57 57.2291           L0 4 0
70 2MASS J10063376+3639203 BD? 10 06 33.766 +36 39 20.33           ~ 1 0
71 2MASS J10081706+0523130 BD? 10 08 17.069 +05 23 13.01           ~ 1 0
72 2MASS J10113481+5014009 BD? 10 11 34.815 +50 14 00.95           ~ 1 0
73 2MASS J10143966+2525108 BD? 10 14 39.661 +25 25 10.87           ~ 1 0
74 2MASS J10195117+0449444 BD* 10 19 50.93464320 +04 49 40.5478200           L 3 0
75 2MASS J10231660+0115496 BD? 10 23 16.609 +01 15 49.65           ~ 1 0
76 SDSS J102356.38+242430.3 Q? 10 23 56.382 +24 24 30.32           ~ 1 0
77 2MASS J10251762+2851133 BD? 10 25 17.627 +28 51 13.35           ~ 1 0
78 2MASS J10254706+1511264 BD? 10 25 47.064 +15 11 26.45           ~ 1 0
79 2MASS J10293524+0620299 BD? 10 29 35.24832 +06 20 29.9976           ~ 4 0
80 2MASS J10293958+5715445 BD* 10 29 39.58104 +57 15 44.5212           L6pec 6 0
81 2MASS J10294770+4834128 BD* 10 29 47.70864 +48 34 12.8353           L0 7 0
82 2MASS J10360244+3724491 BD* 10 36 02.44486 +37 24 49.1294           L0 5 0
83 2MASS J10390822+2440446 BD* 10 39 08.22048 +24 40 44.6628           L7.5 4 0
84 2MASS J10440744+0157422 BD* 10 44 07.47792 +01 57 42.0552           L0 6 0
85 2MASS J10480834+5447148 BD? 10 48 08.342 +54 47 14.80           ~ 1 0
86 2MASS J10481476+1358341 BD* 10 48 14.74775280 +13 58 32.2465440           L 3 0
87 2MASS J10492244+0125593 BD* 10 49 22.44936 +01 25 59.3976           L3.5:V 10 0
88 2MASS J10520466+1722433 BD* 10 52 04.66224 +17 22 43.3200           L3.0 2 0
89 2MASS J10525400+5849512 BD? 10 52 54.008 +58 49 51.23           ~ 1 0
90 2MASS J11000965+4957470 BD* 11 00 09.6403914192 +49 57 46.765961892           L3 25 0
91 2MASS J11082735+0838026 BD* 11 08 27.35352 +08 38 02.6700           L8 5 0
92 2MASS J11150150+1607026 BD* 11 15 01.50240 +16 07 02.6508           L4 7 0
93 2MASS J11180284+0607043 BD? 11 18 02.849 +06 07 04.40           ~ 1 0
94 2MASS J11191046+0552484 BD? 11 19 10.46496 +05 52 48.4896           L? 7 0
95 2MASS J11201296+2125213 BD? 11 20 12.968 +21 25 21.37           ~ 1 0
96 2MASS J11224224+3649287 LM* 11 22 42.26784 +36 49 28.6392           M9V 4 0
97 2MASS J11272293-0037143 BD? 11 27 22.93944 -00 37 14.3076           ~ 2 0
98 2MASS J11302246+1227511 BD? 11 30 22.465 +12 27 51.11           ~ 1 0
99 2MASS J11363969+4852400 BD* 11 36 39.699 +48 52 40.04           L4 5 0
100 2MASS J11410331+6328054 BD? 11 41 03.319 +63 28 05.43           ~ 1 0
101 2MASS J11420197+5219174 LM* 11 42 01.9817018184 +52 19 17.420227932           M8V 4 0
102 2MASS J11430272+1905440 BD* 11 43 02.72472 +19 05 44.0628           L5.5 4 0
103 2MASS J11480726+3901059 BD? 11 48 07.261 +39 01 05.93           ~ 1 0
104 2MASS J11501322+0520124 BD* 11 50 13.17552 +05 20 12.3072   24.55 24.33     L6 13 0
105 2MASS J11501737+5125026 BD? 11 50 17.371 +51 25 02.63           ~ 1 0
106 2MASS J11505903+4409172 BD? 11 50 59.031 +44 09 17.23           ~ 1 0
107 2MASS J11572283+2641197 BD? 11 57 22.839 +26 41 19.75           ~ 1 0
108 2MASS J11582077+0435014 BD* 11 58 20.7331430107 +04 35 02.400141131           sdL7 26 0
109 2MASS J12013614+1350060 BD? 12 01 36.1390663680 +13 50 06.098673048           ~ 1 0
110 2MASS J12033707+4453333 BD? 12 03 37.073 +44 53 33.33           ~ 1 0
111 2MASS J12123874+0007218 BD* 12 12 38.7510739800 +00 07 21.839352996           L0.5 2 0
112 2MASS J12184655+4100161 BD? 12 18 46.555 +41 00 16.18           ~ 1 0
113 2MASS J12221837+3643485 PM* 12 22 18.3996086400 +36 43 48.663381720           M9.5 6 0
114 2MASS J12244949+5021554 BD? 12 24 49.494 +50 21 55.43           ~ 2 0
115 2MASS J12325675+4844172 PM* 12 32 56.7166775376 +48 44 17.295898740           ~ 1 0
116 2MASS J12415185+5615415 BD? 12 41 51.854 +56 15 41.60           ~ 1 0
117 2MASS J12460908+2942001 BD? 12 46 09.087 +29 42 00.13           ~ 1 0
118 2MASS J12465554+5353433 BD? 12 46 55.548 +53 53 43.39           ~ 1 0
119 2MASS J12500304+4848344 BD? 12 50 03.050 +48 48 34.44           ~ 1 0
120 2MASS J12513775+4620274 PM* 12 51 37.7763120195 +46 20 26.951097876           ~ 4 0
121 2MASS J12541069+3825462 BD? 12 54 10.694 +38 25 46.30           ~ 1 0
122 2MASS J12543853+4346573 BD? 12 54 38.534 +43 46 57.37           ~ 2 0
123 2MASS J13044993+0106266 BD? 13 04 49.93128 +01 06 26.6184           ~ 2 0
124 2MASS J13114227+3629235 BD* 13 11 42.2191196845 +36 29 23.661910787           L6.8V 15 1
125 2MASS J13121821+2846432 BD? 13 12 18.218 +28 46 43.27           ~ 1 0
126 2MASS J13253575+5040065 BD? 13 25 35.759 +50 40 06.58           ~ 1 0
127 2MASS J13292602+5317344 BD? 13 29 26.020 +53 17 34.48           ~ 2 0
128 2MASS J13313174+1225317 BD? 13 31 31.74216 +12 25 31.7820           ~ 2 0
129 2MASS J13325777+3258135 BD* 13 32 57.7108578960 +32 58 12.237167712           L0e 6 0
130 2MASS J13331605+3744214 BD* 13 33 16.05984 +37 44 21.4656           L5 3 0
131 2MASS J13402512+5245048 BD? 13 40 25.129 +52 45 04.85           ~ 1 0
132 2MASS J13421013+4140241 BD? 13 42 10.140 +41 40 24.15           ~ 1 0
133 2MASS J13453144+0015515 LM* 13 45 31.43112 +00 15 51.2676           M13e 3 0
134 2MASS J13564047+1402051 BD? 13 56 40.4797953936 +14 02 05.355337200           ~ 1 0
135 2MASS J14005807+2349239 BD? 14 00 58.072 +23 49 23.95           ~ 1 0
136 2MASS J14031898+2437183 BD? 14 03 18.983 +24 37 18.39           ~ 1 0
137 2MASS J14101119+1329008 BD* 14 10 11.19216 +13 29 00.8124           L4 4 0
138 2MASS J14111847+2948515 BD* 14 11 18.47736 +29 48 51.5916           L8.0 7 0
139 2MASS J14140586+0107102 BD* 14 14 05.86008 +01 07 10.2000           L3.5 8 0
140 2MASS J14211078+4728344 LM* 14 21 10.7803803240 +47 28 34.322350440           M9 3 0
141 2MASS J14240454+1846416 BD? 14 24 04.544 +18 46 41.67           ~ 1 0
142 GD 165B BD* 14 24 39.09480 +09 17 10.4352         20.53 L4V 216 0
143 2MASS J14252714+3004004 BD? 14 25 27.1342472352 +30 04 00.351481368           ~ 1 0
144 2MASS J14261290+3130400 BD* 14 26 12.903 +31 30 40.02           L4.0::V 3 0
145 2MASS J14283132+5923354 BD* 14 28 31.3087124280 +59 23 35.426100264           L4.4V 29 0
146 2MASS J14313097+1436539 BD* 14 31 30.9245665010 +14 36 53.851624497           L1 18 0
147 2MASS J14341200+2717300 BD? 14 34 12.004 +27 17 30.03           ~ 1 0
148 2MASS J14363704+4653026 BD? 14 36 37.044 +46 53 02.66           ~ 1 0
149 2MASS J14383259+5722168 BD* 14 38 32.599 +57 22 16.89           L4.6V 7 0
150 2MASS J14505273+4620248 BD? 14 50 52.731 +46 20 24.85           ~ 1 0
151 SIMP J1501530-013506 BD* 15 01 53.02632 -01 35 06.8496           L4.5+L5.5 5 0
152 2MASS J15065127+5533514 BD? 15 06 51.274 +55 33 51.41           ~ 1 0
153 2MASS J15111089+4340372 BD* 15 11 10.890 +43 40 37.25           L5.8V 3 0
154 2MASS J15113624+3535117 BD* 15 11 36.2791426896 +35 35 11.258671524           L0 7 0
155 2MASS J15242797+0242103 BD? 15 24 27.97392 +02 42 10.3752           ~ 2 0
156 2MASS J15280291+0139496 BD? 15 28 02.920 +01 39 49.67           ~ 1 0
157 2MASS J15360712+2030327 BD? 15 36 07.127 +20 30 32.72           ~ 1 0
158 2MASS J15384821+3603375 BD? 15 38 48.211 +36 03 37.54           ~ 1 0
159 2MASS J15394196+5311315 BD? 15 39 41.962 +53 11 31.53           ~ 1 0
160 2MASS J15403876-0012574 BD? 15 40 38.764 -00 12 57.49           ~ 1 0
161 2MASS J15423630-0045452 BD? 15 42 36.30144 -00 45 45.2412           L? 6 0
162 2MASS J15443281+2655509 BD? 15 44 32.81544 +26 55 50.9664           ~ 3 0
163 2MASS J15445518+3301447 LM* 15 44 55.2006490920 +33 01 44.819027004           M16 10 0
164 2MASS J15450291+0618077 BD* 15 45 02.87904 +06 18 07.8336           L1 4 0
165 2MASS J15462328+3338033 BD? 15 46 23.282 +33 38 03.34           ~ 1 0
166 2MASS J15462849+2536338 BD* 15 46 28.4998986947 +25 36 33.831496048           L0 8 0
167 2MASS J15474018+0532087 LM* 15 47 40.1274073728 +05 32 08.537250156           M9 3 0
168 2MASS J15515106+1742163 BD? 15 51 51.063 +17 42 16.34           ~ 1 0
169 2MASS J15521538+0650415 BD* 15 52 15.38424 +06 50 41.6148           L0 3 0
170 2MASS J15570313+1213001 BD? 15 57 02.819 +12 12 58.15           ~ 1 0
171 2MASS J16002277+4841330 BD? 16 00 22.780 +48 41 33.07           ~ 1 0
172 2MASS J16083566+1202267 PM* 16 08 35.6721619152 +12 02 26.578882896           ~ 2 0
173 2MASS J16091143+2116584 BD* 16 09 11.43936 +21 16 58.4472           L2 4 1
174 2MASS J16123103+4833572 BD? 16 12 31.030 +48 33 57.21           ~ 1 0
175 2MASS J16150007+4004345 BD* 16 15 00.074 +40 04 34.51           L2 4 0
176 2MASS J16165508+1908426 BD? 16 16 55.088 +19 08 42.62           ~ 1 0
177 2MASS J16171168+3222496 BD? 16 17 11.684 +32 22 49.69           ~ 1 0
178 2MASS J16184026+2020456 BD* 16 18 40.2373826328 +20 20 45.391821324           L0 4 0
179 2MASS J16302187-0018020 BD? 16 30 21.9115069776 -00 18 02.184258852           ~ 1 0
180 2MASS J16493927+4250436 BD? 16 49 39.280 +42 50 43.61           ~ 1 0
181 2MASS J16591443+1726423 BD? 16 59 14.433 +17 26 42.34           ~ 1 0
182 2MASS J17041824+7443152 BD? 17 04 18.249 +74 43 15.22           ~ 1 0
183 2MASS J17120146+3244566 BD? 17 12 01.468 +32 44 56.66           ~ 1 0
184 SDSS J172006.69+615537.7 BD* 17 20 06.68688 +61 55 37.6644           L3 2 0
185 2MASS J17254557+6405005 BD? 17 25 45.574 +64 05 00.56           ~ 1 0
186 2MASS J17274650+5722476 PM* 17 27 46.4973572952 +57 22 47.522994312           ~ 2 0
187 2MASS J21051530-0037016 BD? 21 05 15.30504 -00 37 01.6212           ~ 2 0
188 2MASS J21184677-0010447 BD* 21 18 46.77288 -00 10 44.6232           L2.2:V 6 0
189 2MASS J23271573+1517310 BD* 23 27 15.73128 +15 17 31.0344           L3.5 6 0
190 2MASS J23404033-0033370 BD? 23 40 40.339 -00 33 37.05           ~ 1 0
191 2MASS J23451385+0024407 BD? 23 45 13.8342007632 +00 24 40.371896736           ~ 1 0

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