2012MNRAS.425.3112C

Query : 2012MNRAS.425.3112C

2012MNRAS.425.3112C - Mon. Not. R. Astron. Soc., 425, 3112-3118 (2012/October-1)

A photometric and astrometric investigation of the brown dwarfs in blanco 1.

CASEWELL S.L., BAKER D.E.A., JAMESON R.F., HODGKIN S.T., DOBBIE P.D. and MORAUX E.

Abstract (from CDS):

We present the results of a photometric and astrometric study of the low-mass stellar and substellar population of the young open cluster Blanco 1. We have exploited J-band data, obtained recently with the Wide Field Camera (WFCAM) on the United Kingdom Infrared Telescope (UKIRT), and 10-year-old I- and z-band optical imaging from CFH12k on the Canada-France-Hawaii Telescope (CFHT), to identify 44 candidate low-mass stellar and substellar members, in an area of 2 deg2, on the basis of their colours and proper motions. This sample includes five sources which are newly discovered. We also confirm the lowest mass candidate member of Blanco 1 unearthed so far (29MJup). We determine the cluster mass function to have a slope of α=+0.93, assuming it to have a power-law form. This is high, but nearly consistent with previous studies of the cluster (to within the errors), and also that of its much better studied Northern hemisphere analogue, the Pleiades.

Abstract Copyright: © 2012 The Authors Monthly Notices of the Royal Astronomical Society 2012 RAS

Journal keyword(s): brown dwarfs - stars: low-mass - open clusters and associations: individual: Blanco 1

Nomenclature: Table 1: [CBJ2012] blNNNNN-NNNNN N=44.

Simbad objects: 47

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Number of rows : 47
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 [MBS2007b] CFHT-BL-89 LM* 00 00 05.86 -30 20 18.4         21.971 ~ 1 0
2 [CBJ2012] bl2399-4716 LM* 00 00 06.83 -30 13 33.7         19.045 ~ 1 0
3 [MBS2007b] CFHT-BL-65 LM* 00 00 07.31 -29 54 26.8         20.575 ~ 1 0
4 [MBS2007b] CFHT-BL-50 LM* 00 00 09.86 -30 01 59.4         19.612 ~ 2 0
5 [CBJ2012] bl7507-10415 LM* 00 00 12.1086527568 -30 35 56.369813244         18.676 ~ 1 0
6 [MBS2007b] CFHT-BL-83 LM* 00 00 34.79 -30 02 51.0         21.800 ~ 1 0
7 [CBJ2012] bl3819-15319 LM* 00 00 36.4950609408 -30 19 16.235652828         19.184 ~ 1 0
8 [CBJ2012] bl3800-15178 LM* 00 00 42.7553160408 -30 17 43.732392648         18.612 M5.6 3 0
9 [CBJ2012] bl60868-7134 LM* 00 01 19.2176761176 -29 54 06.242521968         18.779 ~ 1 0
10 [MBS2007b] F6-09-202 LM* 00 01 35.611 -30 03 09.90         19.268 M6.2 4 0
11 [CBJ2012] bl862-2266 LM* 00 01 48.7692655300 -30 38 06.952772888         18.951 ~ 1 0
12 [MBS2007b] CFHT-BL-114 LM* 00 02 05.68 -30 01 23.7         22.655 ~ 1 0
13 [MBS2007b] CFHT-BL-55 LM* 00 02 15.12 -30 09 52.6         19.835 ~ 1 0
14 [MBS2007b] CFHT-BL-53 LM* 00 02 16.135 -30 18 40.46         19.810 ~ 1 0
15 [CBJ2012] bl89514-11054 LM* 00 02 50.6196601520 -30 28 53.715208958         19.241 ~ 1 0
16 Cl Blanco 1 OpC 00 03 04.1 -29 48 55           ~ 380 0
17 [MBS2007b] CFHT-BL-85 LM* 00 03 06.63 -30 29 53.9         21.999 ~ 1 0
18 [CBJ2012] bl84053-20433 LM* 00 03 17.87 -30 11 40.9         21.663 ~ 1 0
19 [CBJ2012] bl54514-36502 LM* 00 03 23.6408970360 -29 55 17.932839384         19.058 ~ 1 0
20 [CBJ2012] bl54505-36470 LM* 00 03 24.2656863528 -30 00 52.008063624         18.959 ~ 1 0
21 [MBS2007b] CFHT-BL-60 LM* 00 03 40.17 -30 03 40.9         20.478 ~ 1 0
22 [MBS2007b] CFHT-BL-74 LM* 00 03 43.78 -30 04 01.7         21.404 ~ 1 0
23 [CBJ2012] bl56159-35803 LM* 00 03 50.87 -30 01 58.0         22.329 ~ 1 0
24 [MBS2007b] CFHT-BL-51 LM* 00 04 07.62 -29 59 18.8         19.806 ~ 1 0
25 [MBS2007b] CFHT-BL-43 LM* 00 04 32.8868602183 -30 18 41.856386036         19.127 M6.3 3 0
26 [MBS2007b] CFHT-BL-82 LM* 00 04 42.00 -30 04 33.5         21.704 ~ 1 0
27 [CBJ2012] bl51473-23799 LM* 00 04 54.9523440936 -29 46 32.760351768         18.663 ~ 1 0
28 [MBS2007b] CFHT-BL-93 LM* 00 04 57.74 -30 14 02.0         22.186 ~ 1 0
29 [MBS2007b] CFHT-BL-67 LM* 00 05 05.19 -29 49 55.8         20.943 ~ 1 0
30 [MBS2007b] CFHT-BL-70 LM* 00 05 45.83 -30 03 46.1         21.221 ~ 1 0
31 [MBS2007b] CFHT-BL-46 LM* 00 05 57.020 -29 43 47.87         19.328 ~ 1 0
32 [CBJ2012] bl76187-40858 LM* 00 06 08.53 -30 25 42.1         19.767 ~ 1 0
33 [MBS2007b] CFHT-BL-72 LM* 00 06 08.96 -29 44 25.2         21.280 ~ 1 0
34 [CBJ2012] bl76145-40818 LM* 00 06 10.7986334640 -30 21 37.202634144         18.817 ~ 1 0
35 [MBS2007b] CFHT-BL-75 LM* 00 06 29.32 -30 20 33.5         21.321 ~ 1 0
36 [MBS2007b] CFHT-BL-118 LM* 00 06 32.59 -29 46 05.6         22.782 ~ 1 0
37 [CBJ2012] bl33600-62347 LM* 00 06 41.7122243496 -29 42 52.962090444         19.310 ~ 1 0
38 [MBS2007b] CFHT-BL-63 LM* 00 06 49.36 -29 40 41.2         20.698 ~ 1 0
39 [CBJ2012] bl71077-57153 LM* 00 07 08.8070899680 -30 06 42.563548548         18.958 M6.0 3 0
40 [MBS2007b] CFHT-BL-57 LM* 00 07 22.76 -30 01 57.3         20.139 ~ 1 0
41 [CBJ2012] bl78357-42493 LM* 00 07 33.8752977216 -30 24 34.948436508         19.327 ~ 1 0
42 [MBS2007b] CFHT-BL-54 LM* 00 07 41.428 -29 56 19.69         19.971 ~ 1 0
43 [MBS2007b] CFHT-BL-19 LM* 00 07 50.6400083112 -30 05 09.863763972         18.515 ~ 2 0
44 [MBS2007b] F8-04-298 LM* 00 08 13.55 -30 16 50.2         19.384 ~ 1 0
45 [CBJ2012] bl37640-49624 LM* 00 08 27.3701430960 -29 43 54.111760464         18.708 ~ 2 0
46 Cl Melotte 22 OpC 03 46 38.0 +24 10 41           ~ 3679 0
47 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 19090 0

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