2007MNRAS.374..372L

Query : 2007MNRAS.374..372L

2007MNRAS.374..372L - Mon. Not. R. Astron. Soc., 374, 372-384 (2007/January-1)

New brown dwarfs in Upper Sco using UKIDSS Galactic Cluster Survey science verification data.

LODIEU N., HAMBLY N.C., JAMESON R.F., HODGKIN S.T., CARRARO G. and KENDALL T.R.

Abstract (from CDS):

We present first results from a deep (J = 18.7), wide-field (6.5deg2) infrared (ZY JHK) survey in the Upper Sco association conducted within the science verification phase of the United Kingdom Infrared Telescope Infrared Deep Sky Survey Galactic Cluster Survey (GCS). Cluster members define a sequence well separated from field stars in the (Z - J, Z) colour-magnitude diagram. We have selected a total of 164 candidates with J = 10.5-18.7 mag from the (Z - J, Z) and (Y - J, Y) diagrams. We further investigated the location of those candidates in the other colour-magnitude and colour-colour diagrams to weed out contaminants. The cross-correlation of the GCS catalogue with the Two-Micron All-Sky Survey data base confirms the membership of 116 photometric candidates down to 20 Jupiter masses as they lie within a 2σ circle centred on the association mean motion. The final list of cluster members contains 129 sources with masses between 0.3 and 0.007 M☉. We extracted a dozen new low-mass brown dwarfs below 20 MJup, the limit of previous surveys in the region. Finally, we have derived the mass function in Upper Sco over the 0.3-0.01 M☉mass range, best fit by a single segment with a slope of index α = 0.6±0.1, in agreement with previous determination in open clusters.

Abstract Copyright: 2006 The Authors. Journal compilation © 2006 RAS

Journal keyword(s): techniques: photometric - stars: low-mass, brown dwarfs - stars: luminosity function, mass function - open clusters and associations: individual: Upper Sco - infrared: stars

VizieR on-line data: <Available at CDS (J/MNRAS/374/372): table5.dat tableb1.dat tablec1.dat>

Nomenclature: Tables 5,B1,C1: [LHJ2007] JHHMMSS.ss+DDMMSS.s N=129+18+26.

Simbad objects: 181

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Number of rows : 181
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 Cl Melotte 20 MGr 03 26 50.6 +48 51 48           ~ 928 0
2 Cl Melotte 22 OpC 03 46 38.0 +24 10 41           ~ 3679 0
3 NAME Ori Trapezium OpC 05 35 16.5 -05 23 14           ~ 1708 1
4 NAME sig Ori Cluster OpC 05 38 42 -02 36.0           ~ 623 0
5 IC 2391 OpC 08 41 17.5 -53 03 00           ~ 871 0
6 NAME Lower Centaurus Crux As* 12 19 -57.1           ~ 565 1
7 NAME Upper Centaurus Lupus MGr 15 24 -41.9           ~ 567 1
8 2MASS J16060374-2219298 LM* 16 06 03.7646429328 -22 19 29.956749564           M12.00 23 0
9 2MASS J16060629-2335133 BD* 16 06 06.29400 -23 35 13.3656           L0 25 0
10 UScoCTIO 76 LM* 16 06 15.9568510488 -22 18 27.932588028           M4.75 10 0
11 UScoCTIO 84 LM* 16 06 26.3697115896 -23 06 11.399491656           M5.5 20 0
12 2MASS J16063093-2258150 Y*O 16 06 30.9216261312 -22 58 15.085430580           ~ 8 0
13 UScoCTIO 17 LM* 16 06 34.6123371624 -22 55 04.448597556           M5.0 15 0
14 2MASS J16063825-2343036 LM* 16 06 38.2467076584 -23 43 03.774319140           M2.75 10 0
15 UScoCTIO 38 LM* 16 06 39.2211590688 -22 48 34.119137484           M5.0 19 0
16 UScoCTIO 134 LM* 16 06 48.1814420832 -22 30 40.025477124           M8.00 20 0
17 2MASS J16064910-2216382 LM* 16 06 49.1010877464 -22 16 38.273321244           M5.5 11 0
18 2MASS J16065018-2309539 LM* 16 06 50.1808343376 -23 09 54.009865008           M5.0 15 0
19 2MASS J16065753-2303271 * 16 06 57.5284716024 -23 03 27.184037364           ~ 1 0
20 2MASS J16070304-2331460 * 16 07 03.0572173296 -23 31 46.121259612           M3-3.5 14 0
21 2MASS J16070633-2248280 LM* 16 07 06.3314864808 -22 48 28.156663692           M4.5 16 0
22 2MASS J16070881-2339598 LM* 16 07 08.8125577896 -23 39 59.839437132           ~ 7 0
23 2MASS J16071478-2321011 BD* 16 07 14.78112 -23 21 01.1052           L0 22 0
24 2MASS J16072196-2358452 LM* 16 07 21.9624071064 -23 58 45.208149204           M5 11 0
25 2MASS J16072382-2211018 LM* 16 07 23.8268923080 -22 11 01.873246380           M11.00 28 0
26 [LHJ2007] J160725.70-231458.0 * 16 07 25.70 -23 14 58.0           ~ 1 0
27 2MASS J16072641-2144169 Or* 16 07 26.4170326128 -21 44 17.108022480           M6 18 0
28 2MASS J16072760-2154424 PM* 16 07 27.6010713288 -21 54 42.510151368           ~ 1 0
29 2MASS J16072782-2239040 BD* 16 07 27.82416 -22 39 04.0644           L1 21 0
30 UCAC4 335-082089 Or* 16 07 29.5438729056 -23 08 22.209047016   17.36 16.44 15.91   ~ 19 0
31 2MASS J16073799-2242468 BD* 16 07 37.99056 -22 42 46.8324           L0 26 0
32 UScoCTIO 50 LM* 16 07 45.2180922960 -22 22 57.486030528           M5.75 23 0
33 2MASS J16074826-2139038 Y*O 16 07 48.2688329640 -21 39 03.866049864           M5 10 0
34 UScoCTIO 43 LM* 16 07 50.3935016856 -22 21 02.183498496           M5.75 25 0
35 2MASS J16075049-2125200 Or* 16 07 50.4904453440 -21 25 20.099091972           M5.25 16 0
36 2MASS J16080217-2259057 LM* 16 08 02.1781925352 -22 59 05.822567520           M5.75 21 0
37 ATO J242.0230-22.3020 LM* 16 08 05.5453418952 -22 18 07.046215776           M3.25 25 0
38 2MASS J16080745-2345055 LM* 16 08 07.4485675416 -23 45 05.587493724           M6.5 17 0
39 2MASS J16080847-2224599 LM* 16 08 08.4760438752 -22 25 00.047686404           M4.0 19 0
40 2MASS J16081081-2229428 LM* 16 08 10.8163209552 -22 29 42.859028688           M5 28 0
41 2MASS J16081399-2247393 LM* 16 08 14.0000724864 -22 47 39.328032696           M4.5 17 0
42 2MASS J16081566-2222199 LM* 16 08 15.6662977704 -22 22 20.054864892           M3.25 38 0
43 2MASS J16081843-2232248 BD* 16 08 18.43608 -22 32 24.8280           L0 25 0
44 [LHJ2007] J160820.24-233341.7 * 16 08 20.24 -23 33 41.7           ~ 1 0
45 2MASS J16082078-2131234 Or* 16 08 20.7863230968 -21 31 23.486578824           M4.5e 21 0
46 2MASS J16082229-2217029 LM* 16 08 22.2914523557 -22 17 02.942116182           M5.75 19 0
47 2MASS J16082303-2335293 LM* 16 08 23.0414409672 -23 35 29.457047436           M3.25 20 0
48 UCAC4 339-076428 Ro* 16 08 27.3387161712 -22 17 29.308595856   18.09 16.35 15.83   M5.25--M5 22 0
49 2MASS J16082847-2315103 BD* 16 08 28.4764248744 -23 15 10.371654900           L1 29 0
50 UCAC4 342-077943 Or* 16 08 28.6960995768 -21 37 19.954406172           M5 23 0
51 2MASS J16083048-2335109 LM* 16 08 30.4965232728 -23 35 10.989080232           M9.00 31 0
52 2MASS J16083455-2211559 LM* 16 08 34.5569859864 -22 11 55.829213592           M5.25-M5 36 0
53 2MASS J16083970-2306576 * 16 08 39.7028237664 -23 06 57.642212808           ~ 1 0
54 UGCS J160843.43-224516.0 LM* 16 08 43.44 -22 45 16.0           M11.00 14 0
55 2MASS J16084606-2246593 LM* 16 08 46.0685683104 -22 46 59.300160240           M4.0 19 0
56 2MASS J16084744-2235477 LM* 16 08 47.4493088208 -22 35 47.822826660           M9.00 23 0
57 2MASS J16084836-2341209 LM* 16 08 48.3723356496 -23 41 20.912393580           M5.0 27 0
58 2MASS J16085034-2203285 LM* 16 08 50.3431290696 -22 03 28.549812600           M4.5 20 0
59 2MASS J16090197-2151225 LM* 16 09 01.9789821504 -21 51 22.563733968           M6 21 0
60 2MASS J16090200-2322400 LM* 16 09 02.0116385808 -23 22 40.185154596           M4.0 17 0
61 2MASS J16090451-2224523 LM* 16 09 04.5136899288 -22 24 52.291198152           M7 29 0
62 2MASS J16090568-2245166 Or* 16 09 05.6725613064 -22 45 16.577084664           M8.25 13 0
63 2MASS J16090776-2339545 Or* 16 09 07.7550823584 -23 39 54.350798256           M5 22 0
64 2MASS J16090884-2217466 Or* 16 09 08.8364232864 -22 17 46.679542980           M5 18 0
65 2MASS J16090940-2245590 LM* 16 09 09.3936873312 -22 45 59.054680512           M4.5 21 0
66 2MASS J16091689-2341324 LM* 16 09 16.8925187352 -23 41 32.362777104           M5.75 22 0
67 UGCS J160918.67-222923.8 BD* 16 09 18.67920 -22 29 23.8380           L3.0 16 0
68 2MASS J16092938-2343121 LM* 16 09 29.3834181216 -23 43 11.952313176       19.0 16.5 M7.5 18 0
69 UCAC4 338-080619 ** 16 09 32.297592 -22 29 35.98332       15.496   ~ 9 0
70 2MASS J16093575-2138057 Or* 16 09 35.7529463544 -21 38 05.833252392         12.38 M2.5e 16 0
71 SIPS J1609-2123 PM* 16 09 37.8502734048 -21 23 17.827439820           M4.5V 7 0
72 2MASS J16093968-2231537 LM* 16 09 39.6862142880 -22 31 53.890362264           M5.0 19 0
73 2MASS J16094634-2255335 LM* 16 09 46.3377015576 -22 55 33.648081780           M5.0 22 0
74 2MASS J16095217-2136277 Or* 16 09 52.1704554744 -21 36 27.865588140           M7 22 0
75 UGCS J160956.34-222245.6 BD* 16 09 56.34960 -22 22 45.6744           dL3 5 0
76 DENIS J160958.5-234518 LM* 16 09 58.5229770408 -23 45 18.720773604           M6.5 37 0
77 2MASS J16095879-2354273 LM* 16 09 58.7901826320 -23 54 27.420171336           M4.5 12 0
78 2MASS J16100019-2312191 Ro* 16 10 00.1834749744 -23 12 19.273943412           M5.75--M6 6 0
79 2MASS J16100184-2349432 LM* 16 10 01.8424840704 -23 49 43.413993192         12.72 M5.0 21 0
80 UGCS J161002.66-234439.5 * 16 10 02.6604859152 -23 44 39.814469432           ~ 3 0
81 UGCS J161002.85-234440.9 Y*O 16 10 02.8596614736 -23 44 40.855034184           M3.75 9 0
82 DENIS J161006.0-212744 LM* 16 10 06.0825417888 -21 27 44.109381240           M8.5 27 0
83 2MASS J16101903-2124251 Or* 16 10 19.0348133184 -21 24 25.198190028           M4.5 14 0
84 2MASS J16101942-2331089 Or* 16 10 19.4272937496 -23 31 08.936099292           M5.75--M6 13 0
85 2MASS J16102087-2331556 LM* 16 10 20.8749775632 -23 31 55.695636768           M5.5 17 0
86 2MASS J16102344-2312176 LM* 16 10 23.4411781800 -23 12 17.720491716           M4.5 20 0
87 2MASS J16102649-2230533 LM* 16 10 26.4967300896 -22 30 53.429774868           M5.0 18 0
88 DENIS J161030.1-231516 LM* 16 10 30.1458684408 -23 15 16.812101736           M7.5 19 0
89 2MASS J16104714-2239492 LM* 16 10 47.1390030984 -22 39 49.326872040           M9.00 28 0
90 2MASS J16105185-2333255 PM* 16 10 51.8492623152 -23 33 25.787408868           M5.75--M6 4 0
91 2MASS J16105429-2309108 LM* 16 10 54.2928673104 -23 09 10.972033092           M5.75 18 0
92 2MASS J16105499-2126139 Or* 16 10 54.9937217664 -21 26 13.975765728           M6 24 0
93 2MASS J16105728-2359540 Or* 16 10 57.2850773544 -23 59 54.062504988           M4 16 0
94 2MASS J16110212-2335504 LM* 16 11 02.1170930568 -23 35 50.550249012           M5.0 23 0
95 2MASS J16110737-2228501 Or* 16 11 07.3844630496 -22 28 50.173563684           M6.25 21 0
96 ATO J242.7870-23.1412 Y*? 16 11 08.9095183536 -23 08 28.111649640   16.62 15.13 15.03   ~ 8 0
97 2MASS J16111705-2213085 LM* 16 11 17.0536568160 -22 13 08.624478288           M5.0 26 0
98 2MASS J16111907-2319202 LM* 16 11 19.0755570168 -23 19 20.313270300           M5.0 25 0
99 2MASS J16112399-2253326 LM* 16 11 23.9957852472 -22 53 32.582842944           M4.0 20 0
100 2MASS J16112490-2252529 PM* 16 11 24.9075821688 -22 52 53.039692272           ~ 1 0
101 2MASS J16112630-2340059 LM* 16 11 26.3077959336 -23 40 05.996314344           M5.5 23 0
102 2MASS J16113180-2237082 LM* 16 11 31.8129546360 -22 37 08.234762520           M5.5 21 0
103 2MASS J16113470-2219442 LM* 16 11 34.7069365032 -22 19 44.205024144           M5.75 22 0
104 2MASS J16113761-2346147 LM* 16 11 37.6160224752 -23 46 14.761078824           M5.0 21 0
105 2MASS J16113784-2210273 LM* 16 11 37.8486790824 -22 10 27.460284744           M4.0 21 0
106 2MASS J16113837-2307072 LM* 16 11 38.3744344944 -23 07 07.380597072           M6.25 21 0
107 2MASS J16114040-2311347 LM* 16 11 40.3904236422 -23 11 35.327043703           M5.75 13 0
108 2MASS J16115439-2236491 LM* 16 11 54.3985030872 -22 36 49.184403300           M6.25 22 0
109 2MASS J16115737-2215066 Or* 16 11 57.3795074424 -22 15 06.678254520           M5 15 0
110 NAME Upper Sco Association As* 16 12 -23.4           ~ 1586 1
111 [LHJ2007] J161205.64-222412.4 * 16 12 05.64 -22 24 12.4           ~ 1 0
112 2MASS J16120948-2239570 LM* 16 12 09.4878819432 -22 39 57.101387868           ~ 5 0
113 2MASS J16121492-2218038 LM* 16 12 14.9255961240 -22 18 03.899495268           M5.0 14 0
114 2MASS J16121609-2344248 LM* 16 12 16.0992171384 -23 44 24.906779664           M5.0 13 0
115 2MASS J16122764-2156407 BD* 16 12 27.64512 -21 56 40.7148           L0 13 0
116 2MASS J16122895-2159358 BD* 16 12 28.95120 -21 59 35.8044           L1 18 0
117 2MASS J16123414-2144500 Or* 16 12 34.1442166896 -21 44 50.238808656           M4.75 17 0
118 2MASS J16123954-2228082 LM* 16 12 39.5446086480 -22 28 08.261393448           M4.5 19 0
119 2MASS J16124374-2308231 LM* 16 12 43.7409001512 -23 08 23.072602812           M5.0 19 0
120 2MASS J16124692-2338408 Or* 16 12 46.9237078416 -23 38 40.788541860       18.7 15.9 M6 27 0
121 2MASS J16125528-2226542 LM* 16 12 55.2795143616 -22 26 54.248941248           M5.5 21 0
122 2MASS J16130140-2142544 * 16 13 01.3871402928 -21 42 54.955704888           ~ 3 0
123 2MASS J16130232-2124283 BD* 16 13 02.32224 -21 24 28.3788           L0 19 0
124 2MASS J16131082-2313514 LM* 16 13 10.8296112912 -23 13 51.435537456           M5.75 16 0
125 2MASS J16131216-2315164 LM* 16 13 12.1628105328 -23 15 16.407264708           M4.5 19 0
126 2MASS J16131565-2327441 LM* 16 13 15.6516248928 -23 27 44.161508160           ~ 1 0
127 2MASS J16132054-2229159 Or* 16 13 20.5470327720 -22 29 15.936604692           M1.5e 19 0
128 2MASS J16132190-2136136 Or* 16 13 21.9080625000 -21 36 13.743883764           M1.5e 24 0
129 2MASS J16132665-2230348 LM* 16 13 26.6677623480 -22 30 34.853924016           M6.25 20 0
130 2MASS J16133476-2328156 LM* 16 13 34.7692022568 -23 28 15.656856744           M5.75 21 0
131 2MASS J16133647-2327353 LM* 16 13 36.4610045712 -23 27 35.717292900           M5.75 12 0
132 2MASS J16133688-2327298 LM* 16 13 36.8887044312 -23 27 29.826454176           M4.5 17 0
133 [LHJ2007] J161339.04-223314.4 * 16 13 39.04 -22 33 14.4           ~ 1 0
134 2MASS J16134079-2219459 LM* 16 13 40.7920502208 -22 19 46.034585292           M7.5 19 0
135 2MASS J16134131-2354218 LM* 16 13 41.3057449584 -23 54 21.887469000           M5.0 12 0
136 2MASS J16134264-2301279 LM* 16 13 42.6453177360 -23 01 27.936134040           M6.25 18 0
137 2MASS J16135434-2320342 LM* 16 13 54.3201573624 -23 20 34.610381412           M4.5 27 0
138 [LHJ2007] J161401.73-225848.7 Y*O 16 14 01.7298372816 -22 58 48.535887972           M4.75 7 0
139 UCAC4 339-077251 Or* 16 14 12.3549951456 -22 19 13.211771664       16.10   M4.5 17 0
140 2MASS J16141352-2244578 Or* 16 14 13.5183179496 -22 44 57.869698416           M4 22 0
141 2MASS J16142144-2339146 LM* 16 14 21.4439788224 -23 39 14.709695472           M7.00 18 0
142 2MASS J16142312-2219338 LM* 16 14 23.1207141216 -22 19 33.809019600           M5.75 21 0
143 2MASS J16142525-2350151 Y*? 16 14 25.2573762672 -23 50 15.099219024           ~ 11 0
144 2MASS J16143287-2242133 LM* 16 14 32.8666803624 -22 42 13.414745412           M6.5 24 0
145 2MASS J16143846-2321372 LM* 16 14 38.4672504288 -23 21 37.291945968           M4.5 20 0
146 2MASS J16144120-2227052 LM* 16 14 41.1955351752 -22 27 05.331665196           M4.5 18 0
147 2MASS J16144169-2351058 BD* 16 14 41.69616 -23 51 05.8248           L1 15 0
148 2MASS J16144685-2341571 LM* 16 14 46.8557483688 -23 41 57.212279232           M5V 3 0
149 V* BV Sco Or* 16 14 50.2645975728 -23 32 39.686832276           ~ 25 0
150 2MASS J16145131-2308515 Or* 16 14 51.3196777488 -23 08 51.640812384           M5 17 0
151 DENIS J161452.6-201713 LM* 16 14 52.5870211896 -20 17 13.314372864           M9 20 0
152 2MASS J16145750-2328427 LM* 16 14 57.5012364048 -23 28 42.703709808           M4.0 19 0
153 NAME Upper Sco-Cen As* 16 15 -24.2           ~ 1497 1
154 2MASS J16150303-2352501 * 16 15 03.0428261496 -23 52 50.179731312           M6V 3 0
155 2MASS J16150891-2345048 LM* 16 15 08.9176685856 -23 45 04.926516552           M4.5 17 0
156 2MASS J16151602-2345103 Or* 16 15 16.0188571128 -23 45 10.345044888           M5.25--M5 17 0
157 UCAC4 332-080663 Or* 16 15 16.6629044520 -23 40 46.275998736           M8.75 10 0
158 2MASS J16152009-2333545 LM* 16 15 20.0959205088 -23 33 54.549868572           M5.75 20 0
159 2MASS J16152024-2333588 LM* 16 15 20.2451003424 -23 33 58.943819988           M3.5-4 12 0
160 2MASS J16152743-2239275 LM* 16 15 27.4301345328 -22 39 27.589542732           M4.0 18 0
161 2MASS J16152762-2352340 * 16 15 27.6290630136 -23 52 34.025906028           M4.0 8 0
162 2MASS J16152819-2315439 LM* 16 15 28.1958331080 -23 15 44.058110832           M5.5 18 0
163 2MASS J16153648-2315175 LM* 16 15 36.4834590600 -23 15 17.631690588           M5.75 20 0
164 2MASS J16153844-2341558 Or* 16 15 38.4300206472 -23 41 55.948268940           M4.5 17 0
165 2MASS J16153866-2240371 LM* 16 15 38.6667782544 -22 40 37.173718236           M5.75 18 0
166 2MASS J16154205-2235239 LM* 16 15 42.0650776464 -22 35 23.970698412           M4.5 12 0
167 UCAC2 22493422 Or* 16 15 54.8574868392 -23 15 15.080520240       15.63 12.86 M4.5 14 0
168 2MASS J16155926-2329363 LM* 16 15 59.2626279816 -23 29 36.355736148           M5.0 25 0
169 2MASS J16160080-2214192 Or* 16 16 00.8076235752 -22 14 19.289355108           M5.5e 17 0
170 2MASS J16161172-2327050 LM* 16 16 11.7230084736 -23 27 05.046574032           M4.5 19 0
171 2MASS J16161183-2316268 LM* 16 16 11.8446110304 -23 16 26.809371444           M5.0 20 0
172 UGCS J161620.11-234414.3 ** 16 16 20.1176107560 -23 44 14.172676152         12.78 M5.25--M5 14 0
173 [LHJ2007] J161622.51-233842.6 * 16 16 22.51 -23 38 42.6           ~ 1 0
174 2MASS J16162620-2350488 LP? 16 16 26.2004031408 -23 50 48.847733376           ~ 3 0
175 2MASS J16163343-2327210 LM* 16 16 33.4418723208 -23 27 21.172537584           M5.0 18 0
176 2MASS J16164163-2315389 LM* 16 16 41.6351279280 -23 15 39.029812632           M4.5 16 0
177 2MASS J16164396-2351257 LM* 16 16 43.9644191952 -23 51 25.756902216           M4.25 9 0
178 2MASS J16164539-2333413 LM* 16 16 45.3949205064 -23 33 41.318560476           M5 19 0
179 2MASS J16170148-2329058 LM* 16 17 01.4843908800 -23 29 05.755278876           ~ 11 0
180 2MASS J16170606-2225414 Or* 16 17 06.0724507344 -22 25 41.444739084           M4.5e 16 0
181 IC 4665 OpC 17 46 04.0 +05 36 54           ~ 407 0

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