2013MNRAS.435.2474L

Query : 2013MNRAS.435.2474L

2013MNRAS.435.2474L - Mon. Not. R. Astron. Soc., 435, 2474-2482 (2013/November-1)

Probing the Upper Scorpius mass function in the planetary-mass regime.

LODIEU N., DOBBIE P.D., CROSS N.J.G., HAMBLY N.C., READ M.A., BLAKE R.P. and FLOYD D.J.E.

Abstract (from CDS):

We present the results of a deep ZYJ near-infrared survey of 13.5deg2 in the Upper Scorpius (USco) OB association. We photometrically selected ∼ 100 cluster member candidates with masses in the range of 30-5 Jupiters, according to state-of-the-art evolutionary models. We identified 67 ZYJ candidates as bona fide members, based on complementary photometry and astrometry. We also extracted five candidates detected with Visible and Infrared Survey Telescope for Astronomy at YJ only. One is excluded using deep optical z-band imaging, while two are likely non-members, and three remain as potential members. We conclude that the USco mass function is more likely decreasing in the planetary-mass regime (although a flat mass function cannot yet be discarded), consistent with surveys in other regions.

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

Journal keyword(s): techniques: photometric - surveys - brown dwarfs - stars: low-mass - stars: luminosity function, mass function - infrared: stars

VizieR on-line data: <Available at CDS (J/MNRAS/435/2474): table2.dat table3.dat table4.dat>

Nomenclature: Tables 2-4: [LDC2013] JHHMMSS.ss+DDMMSS.s N=67+43+5.

Simbad objects: 119

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Number of rows : 119
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 NGC 1333 OpC 03 29 09.2 +31 20 59           ~ 1575 1
2 IC 348 OpC 03 44 31.1 +32 10 02           ~ 1476 1
3 Cl Melotte 22 OpC 03 46 38.0 +24 10 41           ~ 3679 0
4 Cl Melotte 25 OpC 04 30 27.4 +16 46 43           ~ 3309 0
5 [BZR99] S Ori 65 BD* 05 38 26.1 -02 23 05         23.23 L3.5: 12 0
6 NAME sig Ori Cluster OpC 05 38 42 -02 36.0           ~ 623 0
7 NGC 2632 OpC 08 39 58.4 +19 36 33           ~ 1733 0
8 UGCS J155936.38-221415.8 BD* 15 59 36.38040 -22 14 15.8460           L1.0 6 0
9 UScoCTIO 132 PM* 15 59 37.7665915874 -22 54 13.841712334           M7 19 0
10 2MASS J15594802-2227162 Or* 15 59 48.0231409320 -22 27 16.298348112       19.1 16.5 M7.5 18 0
11 [LDC2013] J155957.99-215422.4 PM* 15 59 57.99888 -21 54 22.2552           ~ 1 0
12 2MASS J15595908-2352301 Or* 15 59 59.0857927488 -23 52 30.162698472           M8 7 0
13 UGCS J160011.67-231215.0 * 16 00 11.6739621648 -23 12 15.111949680           ~ 1 0
14 UScoCTIO 131 LM* 16 00 19.4431273104 -22 56 28.902592752           M8 26 0
15 2MASS J16002163-2332372 Or* 16 00 21.6364222176 -23 32 37.207453524           M7.25 10 0
16 2MASS J16002714-2238504 Or* 16 00 27.1406284224 -22 38 50.447159412           M8.5 6 0
17 2MASS J16002814-2239166 * 16 00 28.1388999264 -22 39 16.728511140           M7.5 8 0
18 2MASS J16004318-2229143 * 16 00 43.1699057040 -22 29 14.262310608           M7.25 12 0
19 UGCS J160136.92-221202.7 BD* 16 01 26.27568 -20 57 25.5600           L7.0 4 0
20 2MASS J16012627-2057255 PM* 16 01 26.276 -20 57 25.56           ~ 1 0
21 2MASS J16014791-2215444 * 16 01 47.91384 -22 15 44.4528           ~ 1 0
22 UGCS J160200.00-205733.9 * 16 02 00.00576 -20 57 33.9948           L? 3 0
23 2MASS J16020429-2231468 Or* 16 02 04.3007392176 -22 31 46.891753536           M1.75 20 0
24 2MASS J16025214-2121296 * 16 02 52.1488460664 -21 21 29.667053880           M7.5 11 0
25 [LDC2013] J160318.88-210235.4 * 16 03 18.87456 -21 02 35.4732           ~ 1 0
26 UGCS J160348.06-235738.7 PM* 16 03 48.06216 -23 57 38.7576           ~ 1 0
27 DANCe J16041234-2127472 BD* 16 04 12.34128 -21 27 46.9512           L2 4 0
28 UGCS J160413.03-224103.2 BD* 16 04 13.03728 -22 41 03.2208           L6.0 6 0
29 2MASS J16041619-2326294 Y*O 16 04 16.1824803672 -23 26 29.956928028           M9.25 3 0
30 UGCS J160420.42-213452.8 BD* 16 04 20.42232 -21 34 52.8960           L6.0 5 0
31 [LDC2013] J160431.52-231304.4 * 16 04 31.52976 -23 13 04.3140           ~ 1 0
32 2MASS J16044211-2234101 PM* 16 04 42.1185770448 -22 34 10.196137632           ~ 1 0
33 UScoCTIO 123 * 16 04 51.9989535744 -22 24 10.892776248           M8 14 0
34 2MASS J16045208-2315160 * 16 04 52.0832284872 -23 15 16.040659824           M8.5 6 0
35 UScoCTIO 136 * 16 05 01.9089519984 -23 21 30.175924176           M8 8 0
36 UGCS J160517.04-213044.9 BD* 16 05 17.04408 -21 30 44.9352           dL2.0 2 0
37 2MASS J16053635-2341519 Y*O 16 05 36.3558896952 -23 41 51.836116812           M8 6 0
38 DANCe J16053908-2403330 BD* 16 05 39.08784 -24 03 32.6484           L4.5 6 0
39 2MASS J16055858-2141367 PM* 16 05 58.5841290936 -21 41 36.872337480           ~ 1 0
40 2MASS J16060258-2202494 * 16 06 02.5930146600 -22 02 49.596815328           M8.5 4 0
41 2MASS J16060374-2219298 LM* 16 06 03.7646429328 -22 19 29.956749564           M12.00 23 0
42 2MASS J16060629-2335133 BD* 16 06 06.29400 -23 35 13.3656           L0 25 0
43 2MASS J16060903-2338112 * 16 06 09.03840 -23 38 11.2344           ~ 1 0
44 2MASS J16063093-2258150 Y*O 16 06 30.9216261312 -22 58 15.085430580           ~ 8 0
45 2MASS J16064555-2121589 BD* 16 06 45.55224 -21 21 58.9104           L1-L3 5 0
46 UScoCTIO 134 LM* 16 06 48.1814420832 -22 30 40.025477124           M8.00 20 0
47 2MASS J16071478-2321011 BD* 16 07 14.78112 -23 21 01.1052           L0 22 0
48 [LDC2013] J160721.69-220347.9 PM* 16 07 21.68688 -22 03 47.6604           ~ 1 0
49 2MASS J16072382-2211018 LM* 16 07 23.8268923080 -22 11 01.873246380           M11.00 28 0
50 2MASS J16072641-2144169 Or* 16 07 26.4170326128 -21 44 17.108022480           M6 18 0
51 2MASS J16072782-2239040 BD* 16 07 27.82416 -22 39 04.0644           L1 21 0
52 [LDC2013] J160729.24-213001.7 PM* 16 07 29.25816 -21 30 01.4760           ~ 1 0
53 UGCS J160731.61-214654.4 BD* 16 07 31.61952 -21 46 54.4188           L4.5 7 0
54 2MASS J16073799-2242468 BD* 16 07 37.99056 -22 42 46.8324           L0 26 0
55 2MASS J16081843-2232248 BD* 16 08 18.43608 -22 32 24.8280           L0 25 0
56 2MASS J16082847-2315103 BD* 16 08 28.4764248744 -23 15 10.371654900           L1 29 0
57 UGCS J160829.14-211629.5 * 16 08 29.14848 -21 16 29.5500           ~ 2 0
58 2MASS J16083048-2335109 LM* 16 08 30.4965232728 -23 35 10.989080232           M9.00 31 0
59 [LDC2013] J160834.29-214804.9 PM* 16 08 34.29504 -21 48 04.8528           ~ 1 0
60 [LDC2013] J160843.09-225459.8 * 16 08 43.09 -22 54 59.8           ~ 1 0
61 UGCS J160843.43-224516.0 LM* 16 08 43.44 -22 45 16.0           M11.00 14 0
62 2MASS J16084744-2235477 LM* 16 08 47.4493088208 -22 35 47.822826660           M9.00 23 0
63 PSO J242.2516-23.1974 PM* 16 09 00.39336960 -23 11 50.9663400           ~ 2 0
64 2MASS J16090568-2245166 Or* 16 09 05.6725613064 -22 45 16.577084664           M8.25 13 0
65 [LDC2013] J160906.62-214105.3 * 16 09 06.62616 -21 41 05.1756           ~ 1 0
66 UGCS J160918.67-222923.8 BD* 16 09 18.67920 -22 29 23.8380           L3.0 16 0
67 [LDC2013] J160926.85-221048.5 PM* 16 09 26.86176 -22 10 48.4536           ~ 1 0
68 2MASS J16092938-2343121 LM* 16 09 29.3834181216 -23 43 11.952313176       19.0 16.5 M7.5 18 0
69 2MASS J16093019-2059536 LM* 16 09 30.1908214320 -20 59 53.693531556       18.8 16.2 M6 27 0
70 UGCS J160956.34-222245.6 BD* 16 09 56.34960 -22 22 45.6744           dL3 5 0
71 2MASS J16100019-2312191 Ro* 16 10 00.1834749744 -23 12 19.273943412           M5.75--M6 6 0
72 DENIS J161006.0-212744 LM* 16 10 06.0825417888 -21 27 44.109381240           M8.5 27 0
73 DENIS J161030.1-231516 LM* 16 10 30.1458684408 -23 15 16.812101736           M7.5 19 0
74 2MASS J16104714-2239492 LM* 16 10 47.1390030984 -22 39 49.326872040           M9.00 28 0
75 [LHJ2007] J161105.28-222257.3 PM* 16 11 05.29248 -22 22 57.3204           ~ 2 0
76 2MASS J16111711-2217173 Or* 16 11 17.1223539048 -22 17 17.387135448       19.7 16.8 M7.5 24 0
77 UGCS J161144.36-221544.4 BD* 16 11 44.36856 -22 15 44.4996           L5.0 7 0
78 UGCS J161148.91-210528.7 * 16 11 48.91080 -21 05 28.7268           ~ 2 0
79 2MASS J16115439-2236491 LM* 16 11 54.3985030872 -22 36 49.184403300           M6.25 22 0
80 NAME Upper Sco Association As* 16 12 -23.4           ~ 1586 1
81 2MASS J16121521-2128142 Or* 16 12 15.1915160232 -21 28 14.879116380           M9 6 0
82 2MASS J16130140-2142544 * 16 13 01.3871402928 -21 42 54.955704888           ~ 3 0
83 2MASS J16130232-2124283 BD* 16 13 02.32224 -21 24 28.3788           L0 19 0
84 [LDC2013] J161334.64-213620.3 PM* 16 13 34.63512 -21 36 20.2788           ~ 1 0
85 [LDC2013] J161337.55-211157.2 PM* 16 13 37.57200 -21 11 57.5196           ~ 1 0
86 2MASS J16134079-2219459 LM* 16 13 40.7920502208 -22 19 46.034585292           M7.5 19 0
87 [LDC2013] J161346.86-212148.3 * 16 13 46.86648 -21 21 48.2040           ~ 1 0
88 DANCe J16140756-2211524 BD* 16 14 07.56288 -22 11 52.1952           L4.5 6 0
89 UGCS J161422.56-233117.6 BD* 16 14 22.56960 -23 31 17.6556           L2.0 5 0
90 2MASS J16143287-2242133 LM* 16 14 32.8666803624 -22 42 13.414745412           M6.5 24 0
91 [LDC2013] J161437.13-210621.2 * 16 14 37.13 -21 06 21.2           ~ 1 0
92 2MASS J16144169-2351058 BD* 16 14 41.69616 -23 51 05.8248           L1 15 0
93 UGCS J161505.29-231911.1 EB* 16 15 05.2964170896 -23 19 11.162493516     17.24     ~ 3 0
94 UGCS J161512.68-222949.0 BD* 16 15 12.68520 -22 29 49.0812           L7.0 6 0
95 UCAC4 332-080663 Or* 16 15 16.6629044520 -23 40 46.275998736           M8.75 10 0
96 2MASS J16152762-2352340 * 16 15 27.6290630136 -23 52 34.025906028           M4.0 8 0
97 [LDC2013] J161532.36-225951.1 * 16 15 32.36 -22 59 51.1           ~ 2 0
98 2MASS J16153648-2315175 LM* 16 15 36.4834590600 -23 15 17.631690588           M5.75 20 0
99 2MASS J16161043-2148081 LM* 16 16 10.4379032760 -21 48 08.145533844           ~ 4 0
100 2MASS J16161066-2151237 * 16 16 10.663 -21 51 23.77           ~ 2 0
101 UGCS J161612.39-240510.8 PM* 16 16 12.39648 -24 05 10.8708           ~ 1 0
102 UGCS J161615.87-222107.3 PM* 16 16 15.87912 -22 21 07.3692           ~ 1 0
103 2MASS J16162598-2112227 Y*O 16 16 25.9885919976 -21 12 22.853294568           M5 9 0
104 [LDC2013] J161632.28-215051.4 PM* 16 16 32.28048 -21 50 52.0260           ~ 1 0
105 2MASS J16170054-2212535 Or* 16 17 00.5279841744 -22 12 54.012042828           M9 4 0
106 2MASS J16170261-2054491 Or* 16 17 02.6172713640 -20 54 49.154801832           M5.75 9 0
107 2MASS J16170653-2053506 PM* 16 17 06.5348943240 -20 53 50.742146724           ~ 1 0
108 [LDC2013] J161726.44-232948.2 * 16 17 26.44080 -23 29 48.2028           ~ 2 0
109 2MASS J16174320-2059209 * 16 17 43.2119175552 -20 59 20.975680104           ~ 1 0
110 2MASS J16174366-2111552 Or* 16 17 43.6765861464 -21 11 55.205186208           M4 6 0
111 UGCS J161754.11-232605.7 Y*O 16 17 54.11376 -23 26 05.7444           M9-L2 2 0
112 2MASS J16180570-2055285 * 16 18 05.7153635112 -20 55 28.532286912           ~ 3 0
113 2MASS J16181973-2345140 * 16 18 19.7281790040 -23 45 14.112847440           ~ 1 0
114 2MASS J16182082-2344210 * 16 18 20.8255015104 -23 44 21.087546864           ~ 1 0
115 2MASS J16182479-2347475 * 16 18 24.7955221776 -23 47 47.585504400           ~ 1 0
116 2MASS J16182548-2340538 * 16 18 25.4697101352 -23 40 53.799604032           ~ 1 0
117 2MASS J16182565-2342453 * 16 18 25.6543249896 -23 42 45.380072160           ~ 1 0
118 NAME Ophiuchus Molecular Cloud SFR 16 28 06 -24 32.5           ~ 3969 1
119 NAME Serpens Cloud SFR 18 29 49 +01 14.8           ~ 1195 1

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