2003ApJ...583..358B

Query : 2003ApJ...583..358B

2003ApJ...583..358B - Astrophys. J., 583, 358-367 (2003/January-3)

Near-infrared adaptive optics imaging of the embedded cluster NGC 2024.

BECK T.L., SIMON M. and CLOSE L.M.

Abstract (from CDS):

We present the results of a high-resolution near-infrared adaptive optics survey of the young obscured star-forming region NGC 2024. Out of the total 73 stars detected in the adaptive optics survey of the cluster, we find three binaries and one triple. The resulting companion star fraction, 7%±3% in the separation range of 0".35-2".3 (145-950 AU), is consistent with that expected from the multiplicity of mature solar-type stars in the local neighborhood. Our survey was sensitive to faint secondaries, but no companions with ΔK'>1.2 mag are detected within 2" of any star. The cluster has a K' luminosity function that peaks at ∼12, and although our completeness limit was 17.7 mag at K', the faintest star we detected had a K' magnitude of 16.62.

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Journal keyword(s): Stars: Binaries: Visual - Galaxy: Open Clusters and Associations: Individual: NGC Number: NGC 2024 - Stars: Pre-Main-Sequence

Nomenclature: Table 1: Cl* NGC 2024 BSC NN (Nos 1-94).

Simbad objects: 111

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Number of rows : 111
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 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 NAME Tau-Aur Complex SFR 04 30 +25.0           ~ 1453 0
5 Cl Melotte 25 OpC 04 30 27.4 +16 46 43           ~ 3309 0
6 NAME Taurus Complex SFR 04 41.0 +25 52           ~ 4971 0
7 NAME Ori Trapezium OpC 05 35 16.5 -05 23 14           ~ 1708 1
8 * zet Ori ** 05 40 45.52666 -01 56 33.2649 0.50 1.56 1.77 1.85 2.05 O9.7Ib+B0III 375 0
9 NAME Horsehead Nebula DNe 05 40 59.0 -02 27 30           ~ 555 0
10 2MASS J05413502-0153286 Y*O 05 41 35.0292307080 -01 53 28.807097280           M4.75 5 0
11 2MASS J05413547-0154195 Y*O 05 41 35.48 -01 54 19.5           ~ 4 0
12 2MASS J05413575-0153483 Y*O 05 41 35.7638821632 -01 53 48.524685504           M2.75 5 0
13 Cl* NGC 2024 BSC 5 * 05 41 35.8 -01 53 32           ~ 1 0
14 2MASS J05413583-0154222 Y*O 05 41 35.84 -01 54 22.2           ~ 2 0
15 Cl* NGC 2024 BSC 9 * 05 41 36.2 -01 53 42           ~ 1 0
16 Cl* NGC 2024 BSC 8 * 05 41 36.2 -01 53 34           ~ 1 0
17 [BCB89] IRS 18 Y*O 05 41 36.2397031704 -01 54 24.347553120           ~ 13 0
18 Cl* NGC 2024 BSC 7 * 05 41 36.29 -01 53 24.5           ~ 1 0
19 Cl* NGC 2024 BSC 10 * 05 41 36.38 -01 53 09.4           ~ 1 0
20 2MASS J05413645-0154412 Y*O 05 41 36.4589264856 -01 54 41.383628712           M7.25 2 0
21 Cl* NGC 2024 BSC 14 * 05 41 36.5 -01 54 10           ~ 1 0
22 2MASS J05413654-0153188 Y*O 05 41 36.5430918048 -01 53 19.027496976           ~ 6 0
23 [BCB89] IRS 17 Y*O 05 41 36.6016646160 -01 53 54.652127892           ~ 7 0
24 2MASS J05413668-0154082 Y*O 05 41 36.6898229784 -01 54 08.408633364           ~ 4 0
25 Cl* NGC 2024 BSC 16 Y*O 05 41 36.6995420808 -01 52 43.151854656           ~ 13 0
26 Cl* NGC 2024 BSC 18 * 05 41 36.7 -01 53 54           ~ 1 1
27 Cl* NGC 2024 BSC 17 * 05 41 36.7 -01 53 54           ~ 1 1
28 Cl* NGC 2024 BSC 20 * 05 41 36.7577615904 -01 52 45.023343564           ~ 1 1
29 [BCB89] IRS 16 Y*O 05 41 36.8214565992 -01 53 59.077159692           ~ 10 0
30 2MASS J05413682-0154479 Y*O 05 41 36.8358422448 -01 54 48.118045788           M7.25 6 0
31 Cl* NGC 2024 BSC 22 * 05 41 36.9 -01 52 35           ~ 1 0
32 Cl* NGC 2024 BSC 23 * 05 41 36.9 -01 52 29           ~ 1 1
33 2MASS J05413693-0152333 Y*O 05 41 36.9420710905 -01 52 33.570825588           ~ 3 1
34 2MASS J05413693-0153393 Y*O 05 41 36.9437944344 -01 53 39.473630844           ~ 5 0
35 [BCB89] IRS 12 Y*O 05 41 37.3414165248 -01 53 13.454106216           ~ 15 0
36 Cl* NGC 2024 HLL 34 Y*O 05 41 37.4001901512 -01 52 44.837581944           ~ 5 0
37 Cl* NGC 2024 BSC 29 * 05 41 37.5 -01 54 33           ~ 1 0
38 Cl* NGC 2024 BSC 27 * 05 41 37.5 -01 52 27           ~ 1 0
39 Cl* NGC 2024 BSC 31 * 05 41 37.6 -01 55 05           ~ 1 0
40 Cl* NGC 2024 BSC 32 * 05 41 37.6 -01 54 36           ~ 1 0
41 2MASS J05413762-0154246 Y*O 05 41 37.6323009096 -01 54 24.814233972           ~ 4 0
42 Cl* NGC 2024 BSC 34 * 05 41 37.7 -01 54 27           ~ 1 0
43 [BCB89] IRS 15 Y*O 05 41 37.7431192008 -01 53 51.578246832           ~ 13 0
44 Cl* NGC 2024 BSC 35 * 05 41 37.8 -01 53 06           ~ 1 0
45 NGC 2024 1 Y*O 05 41 37.8554929272 -01 54 36.640829556   13.58 12.17     B0.5V 60 0
46 Cl* NGC 2024 BSC 38 * 05 41 37.9 -01 54 28           ~ 1 0
47 FLMN J0541379-0153187 Y*O 05 41 37.9 -01 53 19           M4.75 2 0
48 2MASS J05413789-0153112 Y*O 05 41 37.9057871976 -01 53 11.393006748           M 15 0
49 Cl* NGC 2024 BSC 41 * 05 41 38.0 -01 55 16           ~ 1 0
50 2MASS J05413807-0153572 Y*O 05 41 38.0835551256 -01 53 57.311572272           ~ 4 0
51 Cl* NGC 2024 BSC 42 * 05 41 38.1 -01 54 12           ~ 1 0
52 2MASS J05413818-0154549 Y*O 05 41 38.19 -01 54 54.9           ~ 5 0
53 Cl* NGC 2024 BSC 44 * 05 41 38.2 -01 53 23           ~ 1 0
54 [BCB89] IRS 11 Y*O 05 41 38.2491466584 -01 53 09.237286968           ~ 12 0
55 Cl* NGC 2024 BSC 46 * 05 41 38.3 -01 54 20           ~ 1 0
56 2MASS J05413832-0153331 Y*O 05 41 38.3288354568 -01 53 33.261951624           ~ 3 0
57 Cl* NGC 2024 BSC 48 * 05 41 38.4783892584 -01 54 25.538694192           ~ 2 0
58 [BCB89] IRS 10 Y*O 05 41 38.5918815672 -01 53 22.920556200           ~ 8 0
59 2MASS J05413906-0155007 Y*O 05 41 39.06 -01 55 00.8           ~ 2 0
60 [BCB89] IRS 14 Y*O 05 41 39.0936364368 -01 53 58.471752444           ~ 17 0
61 Cl* NGC 2024 BSC 52 * 05 41 39.1 -01 53 57           ~ 1 0
62 [BCB89] IRS 13 Y*O 05 41 39.19320 -01 54 14.0724           ~ 19 0
63 2MASS J05413920-0153075 Y*O 05 41 39.20 -01 53 07.5           ~ 4 0
64 Cl* NGC 2024 BSC 56 * 05 41 39.4 -01 53 28           ~ 1 0
65 Cl* NGC 2024 BSC 54 * 05 41 39.4 -01 53 21           ~ 1 1
66 2MASS J05413956-0154416 Y*O 05 41 39.57 -01 54 41.7           ~ 3 0
67 Cl* NGC 2024 BSC 59 * 05 41 40.0 -01 53 51           ~ 1 0
68 Cl* NGC 2024 BSC 58 * 05 41 40.0 -01 53 30           ~ 1 0
69 2MASS J05414019-0154073 Y*O 05 41 40.20 -01 54 07.3           ~ 4 0
70 Cl* NGC 2024 BSC 61 * 05 41 40.63 -01 53 48.2           ~ 1 0
71 2MASS J05414091-0154087 Y*O 05 41 40.91 -01 54 08.7           ~ 3 0
72 Cl* NGC 2024 BSC 63 * 05 41 41.2 -01 54 33           ~ 1 1
73 Cl* NGC 2024 BSC 64 * 05 41 41.2 -01 54 33           ~ 1 2
74 Cl* NGC 2024 BSC 67 * 05 41 41.3 -01 54 34           ~ 1 1
75 2MASS J05414134-0153326 Y*O 05 41 41.3524630 -01 53 32.838938           ~ 12 0
76 2MASS J05414138-0153522 Y*O 05 41 41.38 -01 53 52.3           ~ 4 0
77 2MASS J05414148-0154390 Y*O 05 41 41.49 -01 54 39.1           ~ 7 0
78 Cl* NGC 2024 BSC 70 * 05 41 41.5 -01 54 07           ~ 1 1
79 Cl* NGC 2024 BSC 71 * 05 41 41.6 -01 54 08           ~ 1 1
80 Cl* NGC 2024 BSC 72 * 05 41 41.6 -01 54 07           ~ 1 1
81 2MASS J05414170-0153444 Y*O 05 41 41.70 -01 53 44.5           ~ 3 0
82 Cl* NGC 2024 HLL 78 Y*O 05 41 41.982 -01 54 24.00           ~ 8 0
83 Cl* NGC 2024 BSC 75 * 05 41 42.4 -01 53 58           ~ 1 0
84 2MASS J05414249-0154097 Y*O 05 41 42.49 -01 54 09.8           ~ 3 0
85 Cl* NGC 2024 BSC 77 * 05 41 42.6 -01 54 34           ~ 1 0
86 Cl* NGC 2024 BSC 76 Y*O 05 41 42.62 -01 54 45.7           ~ 6 0
87 2MASS J05414280-0154360 Y*O 05 41 42.80 -01 54 36.1           ~ 6 0
88 NGC 2024 Cl* 05 41 43 -01 50.5           ~ 1198 1
89 Cl* NGC 2024 BSC 82 * 05 41 43.1 -01 54 29           ~ 1 0
90 Cl* NGC 2024 BSC 80 * 05 41 43.1 -01 54 18           ~ 1 0
91 Cl* NGC 2024 BSC 81 * 05 41 43.1 -01 54 10           ~ 1 0
92 Cl* NGC 2024 BSC 79 * 05 41 43.11 -01 53 57.3           ~ 1 0
93 Cl* NGC 2024 BSC 83 * 05 41 44.0 -01 54 40           ~ 1 0
94 2MASS J05414436-0154203 Y*O 05 41 44.37 -01 54 20.3           ~ 4 0
95 2MASS J05414482-0154251 Y*O 05 41 44.82 -01 54 25.1           ~ 9 0
96 2MASS J05414483-0154357 Y*O 05 41 44.834 -01 54 35.72           ~ 9 0
97 Cl* NGC 2024 BSC 89 * 05 41 45.1 -01 54 18           ~ 1 1
98 Cl* NGC 2024 BSC 88 * 05 41 45.1 -01 54 18           ~ 1 1
99 [BCB89] IRS 2b Y*O 05 41 45.490 -01 54 28.78           O8V 57 1
100 Cl* NGC 2024 BSC 91 * 05 41 45.6 -01 54 44           ~ 1 0
101 [BCB89] IRS 2 Y*O 05 41 45.81 -01 54 29.8           B 105 0
102 Cl* NGC 2024 BSC 93 Y*O 05 41 46.11 -01 54 14.8           ~ 7 0
103 2MASS J05414655-0154469 Y*O 05 41 46.55 -01 54 47.0           ~ 4 0
104 LDN 1630 DNe 05 45.5 -00 59           ~ 392 0
105 M 78 RNe 05 46 45.8 +00 04 45   8.0       ~ 397 0
106 NGC 2071 RNe 05 47 10 +00 18.0           ~ 661 1
107 NAME Chamaeleon Region SFR 11 55 -78.0           ~ 887 0
108 NAME Lupus Complex SFR 16 03 -38.1           ~ 851 0
109 NAME Ophiuchus Molecular Cloud SFR 16 28 06 -24 32.5           ~ 3969 1
110 NAME Oph Cloud Complex DNe 16 30 -24.3           ~ 67 1
111 NAME Corona Australis Cloud MoC 19 01 51 -36 58.9           ~ 554 0

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