2008AJ....135..441S

Query : 2008AJ....135..441S

2008AJ....135..441S - Astron. J., 135, 441-466 (2008/February-0)

The initial mass function and young brown dwarf candidates in NGC 2264. III. Photometric data.

SUNG H., BESSELL M.S., CHUN M.-Y., KARIMOV R. and IBRAHIMOV M.

Abstract (from CDS):

We have performed deep wide-field CCD photometry of the young open cluster NGC 2264 to study the extent of star-forming regions (SFRs) and the shape of the initial mass function. In this paper, we present VRI and Hα photometry for more than 67,000 stars. From the spatial distribution of the selected Hα emission stars, we identify two active SFRs and a less active halo region surrounding these two SFRs. There are several Hα emission stars in the field region outside the halo region, and these may be newly formed stars in the Mon OB1 association surrounding the cluster. The locus of pre-main-sequence (PMS) stars in the IC versus V - ICdiagram is revised from the distribution of Hα and X-ray emission stars in the diagram. The mean reddening of late-type PMS stars is estimated to be E(B - V) ~ 0.2 mag using the distribution of X-ray emission stars in the 2MASS color-color diagram. We can confirm that the Hα emission stars below the PMS locus (so-called BMS stars) are bona-fide members of NGC 2264 from their spatial distribution as well as from their near-IR excess in the 2MASS color-color diagram. In addition, four objects around IRS-2 detected with the Spitzer IRAC are also classified as BMS stars.

Abstract Copyright: ∼

Journal keyword(s): open clusters and associations: individual: NGC 2264 - stars: low-mass, brown dwarfs - stars: luminosity function, mass function

VizieR on-line data: <Available at CDS (J/AJ/135/441): table3.dat table8.dat table9.dat table12.dat>

Nomenclature: Table 3: Cl* NGC 2264 CID CNNNNN (Nos C00001 to C66066). Table 8: Cl* NGC 2264 WID WNNNN (Nos W0001 to W9000). Table 9: Cl* NGC 2264 SID SNNNN (Nos S0001 to S6044).

Status at CDS : All or part of tables of objects could be ingested in SIMBAD with priority 2.

Simbad objects: 103

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Number of rows : 103
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 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 12317 1
2 GSC 00012-00567 * 00 56 06.6525703920 +01 00 20.830293288 16.114 15.762 14.953 14.491 11.678 ~ 6 0
3 NAME Per Arm PoG 03 30 +45.0           ~ 1672 0
4 IC 348 OpC 03 44 31.1 +32 10 02           ~ 1476 1
5 Cl Melotte 22 OpC 03 46 38.0 +24 10 41           ~ 3679 0
6 Cl Melotte 25 OpC 04 30 27.4 +16 46 43           ~ 3309 0
7 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 19090 0
8 NAME Ori Trapezium OpC 05 35 16.5 -05 23 14           ~ 1708 1
9 V* FU Ori Or* 05 45 22.3647842544 +09 04 12.291320064   10.72 9.60     F0Iab 888 1
10 NGC 2168 OpC 06 09 07.5 +24 20 15           ~ 604 0
11 NAME Mon I MoC 06 35 +10.1           ~ 268 0
12 2MASS J06393962+0940442 Y*O 06 39 39.6287219352 +09 40 44.132860452     21.790 20.191 18.290 ~ 3 0
13 2MASS J06401412+0934091 BD? 06 40 14.1347701968 +09 34 09.111873720     22.305 20.646 18.669 ~ 2 0
14 2MASS J06401789+0941546 Y*O 06 40 17.8676736264 +09 41 54.970809864     22.560 20.920 18.589 ~ 4 0
15 2MASS J06402107+0935247 Y*O 06 40 21.0787833048 +09 35 24.839086308     21.433 19.684 17.508 ~ 3 0
16 Cl* NGC 2264 CID C21459 Y*O 06 40 21.3199403976 +09 48 25.971895044       21.937 19.036 ~ 3 0
17 Cl* NGC 2264 CID C21605 BD? 06 40 21.73 +09 06 04.7     22.849 20.910 18.516 ~ 2 0
18 2MASS J06402354+0948330 BD? 06 40 23.5381221456 +09 48 32.849892828     22.044 20.771 18.467 ~ 3 0
19 Cl* NGC 2264 CID C23335 BD? 06 40 26.4700221650 +09 44 48.227654956     22.991 21.284 18.898 ~ 3 0
20 [SBC2004b] CFHT 4720 BD? 06 40 28.98 +09 48 04.3       22.532 19.766 ~ 3 0
21 2MASS J06402937+0941035 BD? 06 40 29.4041838456 +09 41 03.787013652     22.175 20.850 18.506 ~ 3 0
22 Cl* NGC 2264 RMS 2446 Y*O 06 40 30.6361831032 +09 54 36.558268128     21.858 20.406 17.888 M7 7 0
23 Cl* NGC 2264 RMS 2462 Y*O 06 40 31.0700330064 +09 35 40.153106076     21.064 19.320 17.224 ~ 5 0
24 Cl* NGC 2264 RMS 2463 TT* 06 40 31.1061002016 +09 49 31.939641516     21.695 19.882 17.420 ~ 13 0
25 2MASS J06404043+0911372 Y*O 06 40 40.4135823912 +09 11 37.072116564       22.434 19.907 ~ 3 0
26 Cl* NGC 2264 RMS 2764 Y*O 06 40 40.7840352120 +09 34 26.913615852     21.318 19.758 17.739 M6 11 0
27 2MASS J06404119+0931287 Y*O 06 40 41.1880873848 +09 31 28.572643452     23.011 21.123 18.685 ~ 4 0
28 Cl* NGC 2264 RMS 2793 TT* 06 40 41.6431434000 +09 31 43.182535476     21.225 19.616 17.566 M5e 10 0
29 Cl* NGC 2264 SBL 1944B BD? 06 40 41.87 +09 43 55.7       21.720 19.052 ~ 3 0
30 Cl* NGC 2264 RMS 2906 Y*O 06 40 44.9376244008 +09 38 49.722863316     22.058 20.045 17.606 ~ 5 0
31 Cl* NGC 2264 RMS 2944 TT* 06 40 46.1031007560 +09 47 14.291999808     21.520 20.009 17.584 M6e 9 0
32 [SBC2004b] CFHT 7277 Y*O 06 40 49.97 +09 52 17.8       22.687 20.084 ~ 3 0
33 NGC 2264 340B Y*O 06 40 50.0310136772 +09 44 54.029701337     22.045 20.244 17.788 ~ 3 0
34 Cl* NGC 2264 RMS 3056 Y*O 06 40 50.0686971552 +09 47 06.410016672     21.395 19.986 17.613 ~ 7 0
35 Cl* NGC 2264 DS 184 TT* 06 40 51.0411989544 +09 49 06.063236688     21.046 19.706 17.473 ~ 6 0
36 [SBC2004b] CFHT 7422 Y*O 06 40 51.0892221240 +09 54 33.796281924     21.646 20.172 18.062 ~ 3 0
37 Cl* NGC 2264 SBL 2149 Y*O 06 40 51.3896185104 +09 45 57.726807048     22.521 20.273 18.057 ~ 6 0
38 2MASS J06405300+0947377 Y*O 06 40 53.0218981488 +09 47 37.700575080     22.491 21.106 18.750 ~ 3 0
39 NGC 2264 OpC 06 40 53.7 +09 52 32           ~ 1876 0
40 Cl* NGC 2264 LBM 5520 LM* 06 40 55.79880 +09 36 06.1524       21.730 19.323 M4.5 8 0
41 Cl* NGC 2264 RMS 3241 LM* 06 40 56.4254503272 +09 34 44.245921008     21.909 20.303 18.330 M5 9 0
42 Cl* NGC 2264 LBM 5570 LM* 06 40 56.7401776728 +09 38 10.087750284       21.421 19.098 M7.5 6 0
43 Cl* NGC 2264 LBM 5613 TT* 06 40 57.4770543768 +09 35 14.692609392     22.842 20.766 18.285 Me 7 0
44 2MASS J06405798+1002163 BD? 06 40 57.9783312024 +10 02 16.294533216     21.271 19.564 17.462 ~ 2 0
45 Cl* NGC 2264 SBL 2250B Y*O 06 40 58.1684914632 +09 51 12.920921748     21.888 20.233 17.666 ~ 3 0
46 Cl* NGC 2264 CID C33627 BD? 06 40 58.34 +10 17 12.8       22.479 20.070 ~ 2 0
47 2MASS J06405834+0937567 Y*O 06 40 58.3420924440 +09 37 56.745237072     21.630 19.654 17.374 ~ 8 0
48 2MASS J06405843+0937445 Y*O 06 40 58.4379899568 +09 37 44.448847860     21.357 19.249 16.886 ~ 8 0
49 * 15 Mon Be* 06 40 58.65963 +09 53 44.7229 3.360 4.45 4.68   4.88 O7V+B1.5/2V 823 0
50 V* V912 Mon Or* 06 40 59.3018740704 +09 35 52.389900096         16.50 GIII 37 0
51 2MASS J06405941+0945516 Y*O 06 40 59.4244670088 +09 45 51.707806200     21.248 19.853 17.608 ~ 4 0
52 Cl* NGC 2264 FMS 2-911 BD? 06 40 59.54 +09 34 43.6       21.535 19.328 ~ 3 0
53 Cl* NGC 2264 RMS 3333 TT* 06 40 59.6306052456 +09 36 57.538871496     21.985 19.932 17.641 M6e 14 0
54 [SBC2004b] CFHT 8141 Y*O 06 40 59.96 +09 49 18.2       22.183 19.679 ~ 3 0
55 Cl* NGC 2264 RMS 3356 BD? 06 41 00.3257187144 +09 30 17.224768152     22.157 20.456 18.344 ~ 3 0
56 Cl* NGC 2264 RMS 3362 Y*O 06 41 00.5517370776 +09 36 12.332049552     21.834 19.654 17.430 ~ 5 0
57 2MASS J06410258+0936156 Y*O 06 41 02.5955608944 +09 36 15.567048576       21.025 18.456 ~ 5 0
58 Cl* NGC 2264 RMS 3417 TT* 06 41 02.6688778056 +09 50 32.832819852     21.102 19.663 17.266 Me 6 0
59 IRAS 06382+0939 Y*O 06 41 02.81160 +09 36 16.1712         19.89 ~ 93 0
60 2MASS J06410350+0935248 BD? 06 41 03.5062098432 +09 35 24.734230476     22.068 20.492 18.497 ~ 4 0
61 Cl* NGC 2264 LBM 5819 Y*O 06 41 03.7901031600 +09 34 53.948238600     22.720 21.024 18.900 ~ 4 0
62 2MASS J06410389+0919352 Y*O 06 41 03.8885511168 +09 19 35.233980060     21.755 19.726 17.661 ~ 11 0
63 V* V809 Mon Or* 06 41 04.1712193560 +09 34 57.134251308     21.629 19.702 17.406 M8 10 0
64 Cl* NGC 2264 FMS 2-1114 Y*O 06 41 05.8022229048 +09 31 07.306468032     21.426 19.538 17.311 M8 8 0
65 NAME Cone Nebula DNe 06 41.1 +09 53           ~ 91 1
66 Cl* NGC 2264 RMS 3523 LM* 06 41 06.0513790056 +09 49 23.067620436     22.414 20.802 18.082 M7 7 0
67 Cl* NGC 2264 LBM 5944 BD? 06 41 06.52 +09 30 04.9     24.456 22.521 20.220 ~ 3 0
68 Cl* NGC 2264 LBM 5957 LM* 06 41 06.9701751960 +09 35 55.809478284     22.868 21.076 18.929 M5.5 6 0
69 Cl* NGC 2264 RMS 3569 Y*O 06 41 07.5858214128 +09 30 00.521568504     23.305 20.527 18.311 ~ 5 0
70 2MASS J06410812+0918151 Y*O 06 41 08.1259786056 +09 18 15.030596412     22.109 19.745 17.344 ~ 7 0
71 Cl* NGC 2264 LBM 6036 Y*O 06 41 09.0550463328 +09 29 07.409848596     22.349 19.723 17.386 M7e 8 0
72 HD 47887 Y*O 06 41 09.5990050152 +09 27 57.538520712 6.01 6.96 7.14   7.40 B0.7V 112 0
73 Cl* NGC 2264 LBM 6077 Y*O 06 41 10.16760 +09 31 22.3572     24.447 22.601 19.928 M7 7 0
74 V* V582 Mon TT* 06 41 10.3403165544 +09 28 33.487425336   17.404   17.21 16.45 K5e 206 0
75 Cl* NGC 2264 RMS 3677 LM* 06 41 11.8000415112 +09 31 12.274084776     23.413 21.154 18.646 M6.5 11 0
76 2MASS J06411208+0945281 Y*O 06 41 12.0851186592 +09 45 28.217523456     22.210 20.459 18.102 ~ 4 0
77 2MASS J06411242+0913247 BD? 06 41 12.4217528928 +09 13 24.764785932     21.220 19.350 17.151 ~ 3 0
78 2MASS J06411326+0935473 Y*O 06 41 13.2707644848 +09 35 47.371575948       19.555 17.253 ~ 5 0
79 2MASS J06411365+0955370 Y*O 06 41 13.6534537992 +09 55 37.224673932     22.273 20.555 18.176 ~ 5 0
80 2MASS J06411578+0915357 BD? 06 41 15.785 +09 15 35.71       22.503 19.955 ~ 2 0
81 2MASS J06411613+0938166 BD? 06 41 16.1545878936 +09 38 16.399779540     22.595 20.777 18.666 ~ 4 0
82 Cl* NGC 2264 CID C37601 BD? 06 41 17.12 +09 24 34.4     23.402 21.627 19.449 ~ 2 0
83 2MASS J06411714+0943378 Y*O 06 41 17.1424425792 +09 43 37.890427512     21.494 20.105 17.905 ~ 3 0
84 Cl* NGC 2264 FMS 2-1412 LM* 06 41 17.1466185504 +09 29 04.993912320     22.526 20.603 18.672 M5.5 4 0
85 2MASS J06411736+0931519 Y*O 06 41 17.3624320848 +09 31 52.186665324     22.298 20.489 18.232 ~ 6 0
86 Cl* NGC 2264 LBM 6307 Y*O 06 41 17.37840 +09 37 15.1140       21.922 19.301 M7 8 0
87 Cl* NGC 2264 LBM 6349 LM* 06 41 18.6200432520 +09 54 07.633088856     23.095 21.095 18.770 M3 6 0
88 Cl* NGC 2264 FMS 2-1449 BD? 06 41 18.77 +09 35 19.0     23.690 21.963 19.648 ~ 3 0
89 Cl* NGC 2264 CID C38517 BD? 06 41 20.72 +09 28 44.3     23.560 21.347 19.247 ~ 2 0
90 Cl* NGC 2264 RMS 3895 Y*O 06 41 21.0412696248 +09 32 41.696479464     21.164 19.478 17.402 ~ 7 0
91 2MASS J06412177+1017003 Y*O 06 41 21.7750530576 +10 17 00.398981724     22.068 20.254 18.262 ~ 3 0
92 Cl* NGC 2264 LBM 6607 LM* 06 41 23.290 +09 32 30.32     22.460 20.827 18.760 M7 5 0
93 Cl* NGC 2264 RMS 4001 BD? 06 41 25.9319412480 +09 30 26.146463292     21.750 20.017 17.970 ~ 3 0
94 2MASS J06412695+0946003 BD? 06 41 26.9587844232 +09 46 00.281986752     22.095 20.555 18.567 ~ 2 0
95 Cl* NGC 2264 CID C42417 BD? 06 41 34.29 +09 38 53.7       21.953 19.487 ~ 2 0
96 2MASS J06413618+1010481 BD? 06 41 36.1606347408 +10 10 48.113700744     22.754 20.908 18.778 ~ 2 0
97 Cl* NGC 2264 CID C44891 BD? 06 41 40.91 +10 03 29.7       22.208 19.875 ~ 2 0
98 IRAS 06497-0016 LP? 06 52 15.7316803560 -00 19 44.213258784 19.600 19.700 17.800 14.700 12.000 M9 12 0
99 NGC 2632 OpC 08 39 58.4 +19 36 33           ~ 1733 0
100 G 161-88 PM* 09 56 17.3708028360 -00 31 57.073791000 17.292 15.911 14.380 13.340 12.143 ~ 14 0
101 * rho Oph ** 16 25 35.11766 -23 26 49.8150 4.30 4.85 4.63 4.27 3.96 B2IV+B2V 670 0
102 NGC 6231 OpC 16 54 14.4 -41 48 53           ~ 562 0
103 VB 10 PM* 19 16 57.6109547886 +05 09 01.600923413     17.30     M8V 499 1

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