2004AJ....127.1747H


Query : 2004AJ....127.1747H

2004AJ....127.1747H - Astron. J., 127, 1747-1754 (2004/March-0)

A near-infrared multiplicity survey of class I/Flat-spectrum systems in six nearby molecular clouds.

HAISCH K.E.Jr, GREENE T.P., BARSONY M. and STAHLER S.W.

Abstract (from CDS):

We present new near-IR observations of 76 Class I/flat-spectrum objects in the nearby (d≲320 pc) Perseus, Taurus, Chamaeleon I and II, ρ Ophiuchi, and Serpens dark clouds. These observations are part of a larger systematic infrared multiplicity survey of self-embedded objects in the nearest dark clouds. When combined with the results of our previously published near-infrared multiplicity survey, we find a restricted companion star fraction of 14/79 (18%±4%) of the sources surveyed to be binary or higher order multiple systems over a separation range of ∼300-2000 AU with a magnitude difference ΔK≤4 and with no correction for background contamination or completeness. This is consistent with the fraction of binary/multiple systems found among older pre-main-sequence T Tauri stars in each of the Taurus, ρ Oph, and Chamaeleon star-forming regions over a similar separation range, as well as the combined companion star fraction for these regions. However, the companion star fraction for solar-type, and lower mass M dwarf, main-sequence stars in the solar neighborhood in this separation range (11%±3%) is approximately one-half that of our sample. Together with multiplicity statistics derived for previously published samples of Class 0 and Class I sources, our study suggests that a significant number of binary/multiple objects may remain to be discovered at smaller separations among our Class I/flat-spectrum sample and/or most of the evolution of binary/multiple systems occurs during the Class 0 phase of early stellar evolution.

Abstract Copyright:

Journal keyword(s): Stars: Binaries: Close - Stars: Formation - Stars: Pre-Main-Sequence

CDS comments: Table 6 : Cha II 8 not identified

Simbad objects: 92

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Number of rows : 92
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 2MASS J03250943+3046215 Y*O 03 25 09.430 +30 46 21.58     19.5     ~ 91 0
2 2MASS J03283450+3100510 Y*O 03 28 34.501 +31 00 51.01           ~ 71 0
3 V* V512 Per Or* 03 29 03.7578170808 +31 16 03.947525688           ~ 369 0
4 LZK 12 Y*O 03 29 10.4138336046 +31 21 59.070333199   16.06 14.25     B5:V+F2: 131 0
5 IRAS 03262+3114 IR 03 29 20.4 +31 24 47           ~ 6 0
6 NAME Perseus Cloud SFR 03 35.0 +31 13           ~ 1226 0
7 IRAS 03380+3135 cor 03 41 09.1372476624 +31 44 37.906318320           ~ 20 0
8 IRAS 03382+3145 MIR 03 41 20.94912 +31 54 50.8572           ~ 11 0
9 2MASS J03470544+3243084 Y*O 03 47 05.447 +32 43 08.43           ~ 54 0
10 IRAS 03445+3242 Y*O 03 47 41.603 +32 51 43.79           ~ 187 0
11 IRAS 04016+2610 Y*O 04 04 43.07064 +26 18 56.3904           ~ 247 0
12 IRAS 04108+2803 mul 04 13 54.9 +28 11 31           ~ 90 1
13 IRC +20082 AB* 04 29 07.6303239624 +24 43 50.048839668   20.57 17.37   10.45 M8III 73 0
14 V* GV Tau TT* 04 29 23.7314759229 +24 33 00.216016292 19.20         K7 280 0
15 Haro 6-13 Or* 04 32 15.4174258632 +24 28 59.577717108 19.22   17.7     M0 198 1
16 IRAS 04295+2251 Y*O 04 32 32.05488 +22 57 26.6724           K0-M4 91 0
17 Haro 6-28 Or* 04 35 56.8536876816 +22 54 36.092202012 18.94         M3.1 93 0
18 IRAS 04361+2547 Y*O 04 39 13.89288 +25 53 20.8788           ~ 190 1
19 IRAS 04365+2535 Y*O 04 39 35.19360 +25 41 44.7252           ~ 261 0
20 NAME Taurus Complex SFR 04 41.0 +25 52           ~ 3973 0
21 IRAS 04489+3042 Y*O 04 52 06.6862507800 +30 47 17.007457092           M2 64 0
22 NAME Trapezium Cluster As* 05 35 16.5 -05 23 14           ~ 1549 1
23 NGC 2024 Cl* 05 41 43 -01 50.5           ~ 1113 1
24 IRAS 11030-7702 TT* 11 04 22.7159038128 -77 18 08.299910700     17.89     K6/M0e 47 0
25 HH 48 HH 11 04 22.8 -77 18 08           ~ 40 0
26 Ass Cha T 2-21 TT* 11 06 15.3471261840 -77 21 56.720362608   12.58 11.01   9.35 G5Ve 129 0
27 NAME Cha 1 MoC 11 06 48 -77 18.0           ~ 1070 1
28 [PCW91] Ced 110 IRS 11 Y*O 11 06 58.030 -77 22 48.87           ~ 19 0
29 IRAS 11057-7706 Y*O 11 07 09.19896 -77 23 04.9920           ~ 59 0
30 V* GZ Cha Or* 11 07 16.22784 -77 23 06.8316           M1 25 0
31 Ass Cha T 1-16 Or* 11 07 57.9428053584 -77 38 44.977882344   15.1 14.2   13.04 K4-7 63 0
32 ESO-HA 562 Or* 11 08 02.8789169712 -77 38 42.580139640     17.61   14.41 M0.5+M0.5 42 0
33 HD 97048 Ae* 11 08 03.3109731720 -77 39 17.490777444 9.03 8.76 9.00   8.64 A0Vep 501 0
34 V* HP Cha Or* 11 08 15.216432 -77 33 53.17020   14.33 12.77 12.11   K3+G5e 102 0
35 V* HP Cha A * 11 08 15.4974157248 -77 33 53.446498956           K6e 81 0
36 ISO-ChaI 138 LM* 11 08 18.4691867664 -77 30 40.891618332         16.77 ~ 36 0
37 NAME Cha IR Nebula TT* 11 08 38.702 -77 43 51.54           M5.5 72 0
38 V* HV Cha Or* 11 09 22.6489972128 -76 34 32.164757616         16.79 M0.75-M1.75 49 0
39 HD 97300 Ae* 11 09 50.0199904704 -76 36 47.718191232   9.41 9.20   8.82 B9V 164 1
40 Ass Cha T 1-23 Or* 11 09 53.4189070920 -76 34 25.652641116   13.9 19.50 15.10 13.52 G9IIIe 83 0
41 V* HY Cha Or* 11 09 54.3714582264 -76 31 11.437434660     21.6   17.27 M1.75e 26 0
42 V* WW Cha Or* 11 10 00.0802739160 -76 34 57.963853416   14.74 14.10   10.95 ~ 140 0
43 Ass Cha T 1-27 Or* 11 10 49.5667074984 -77 17 51.754670016   16.80 16.64   13.84 M4Ve 72 0
44 NAME Chamaeleon Region SFR 11 55 -78.0           ~ 747 0
45 NAME Cha II MoC 12 54 -77.2           ~ 316 0
46 GSS 26 Y*O 16 26 10.33152 -24 20 54.8232           M0 78 1
47 CRBR 2315.8-1700 Y*O 16 26 17.22936 -24 23 45.3660           ~ 40 0
48 CRBR 2317.5-1729 Y*O 16 26 18.98232 -24 24 14.2596           ~ 42 0
49 GSS 30 Y*O 16 26 21.38160 -24 23 04.0524           ~ 207 1
50 VSSG 27 Y*O 16 26 30.46896 -24 22 57.1440           M 61 1
51 [GY92] 91 Y*O 16 26 40.46952 -24 27 14.4720           ~ 71 1
52 VSSG 30 Y*O 16 26 44.19504 -24 34 48.3492           ~ 132 0
53 WL 2 Y*O 16 26 48.48624 -24 28 38.9064           ~ 58 1
54 WL 22 TT* 16 26 59.16720 -24 34 58.8072           ~ 64 0
55 VSSG 31 Or* 16 27 04.10688 -24 28 29.9136           ~ 59 1
56 [GY92] 197 Y*O 16 27 05.24616 -24 36 29.7936           ~ 65 1
57 WL 17 Y*O 16 27 06.77616 -24 38 14.9964           ~ 94 0
58 Elia 2-29 Y*O 16 27 09.43032 -24 37 18.7716           ~ 276 1
59 WLY 2-33 Y*O 16 27 14.50512 -24 26 46.0860           ~ 32 0
60 YLW 10B Y*O 16 27 15.45432 -24 26 39.8004           ~ 49 0
61 YLW 12A Y*O 16 27 17.57160 -24 28 56.2944           ~ 66 0
62 WL 5 TT* 16 27 18.17064 -24 28 52.6800           ~ 88 0
63 BBRCG 39 Y*O 16 27 18.38040 -24 39 14.6844           ~ 38 0
64 WL 3 Y*O 16 27 19.21584 -24 28 43.8528           K7 62 0
65 YLW 13B Y*O 16 27 21.46872 -24 41 43.0692           ~ 90 0
66 WL 6 Y*O 16 27 21.80448 -24 29 53.3616           ~ 113 0
67 CRBR 2422.8-3423 Y*O 16 27 24.61320 -24 41 03.4080           ~ 86 1
68 Elia 2-32 Y*O 16 27 28.44576 -24 27 21.0348           K6.5 109 1
69 YLW 16B Or* 16 27 29.43528 -24 39 16.1892           ~ 105 0
70 IRAS 16245-2423 TT* 16 27 37.1906433768 -24 30 35.025246828       16.66 14.67 B5-F2 265 0
71 WLY 2-50 Y*O 16 27 38.1256099368 -24 30 42.980129964           ~ 31 0
72 [GY92] 312 Y*O 16 27 38.94456 -24 40 20.6724           M2.5 41 0
73 [GY92] 344 Y*O 16 27 45.78672 -24 44 53.8620           M6 29 0
74 YLW 52 Y*O 16 27 51.80472 -24 31 45.5304           ~ 67 0
75 NAME Ophiuchus Molecular Cloud SFR 16 28 06 -24 32.5           ~ 3373 1
76 2MASS J18294702+0116267 Y*O 18 29 47.023 +01 16 26.77           ~ 12 0
77 NAME Serpens Cloud SFR 18 29 49 +01 14.8           ~ 1021 2
78 IRAS 18272+0114 Or* 18 29 49.13016 +01 16 20.6472           ~ 69 1
79 V* V370 Ser Or* 18 29 49.24584 +01 16 31.5480           ~ 31 0
80 2MASS J18294960+0117058 Y*O 18 29 49.602 +01 17 05.83           ~ 30 0
81 SSTc2d J182949.6+011456 Y*O 18 29 49.70 +01 14 56.7           ~ 14 0
82 [ACA2003] Ser B 1 Y*O 18 29 52.85 +01 14 56.1           ~ 17 1
83 2MASS J18295520+0113222 Y*O 18 29 55.200 +01 13 22.21           ~ 16 0
84 2MASS J18295667+0112393 Y*O 18 29 56.674 +01 12 39.32           ~ 19 0
85 HBC 672 Em* 18 29 56.8848005064 +01 14 46.304766672   17.6       K8.0 100 0
86 2MASS J18295741+0114503 Y*O 18 29 57.4127920080 +01 14 50.197813116           M2.0 17 0
87 2MASS J18295781+0112280 Y*O 18 29 57.819 +01 12 28.05           ~ 20 0
88 2MASS J18295784+0112379 Y*O 18 29 57.849 +01 12 37.90           ~ 23 0
89 SSTc2d J182959.5+011159 cor 18 29 59.573 +01 11 58.39           ~ 23 0
90 2MASS J18300111+0113242 Y*O 18 30 01.110 +01 13 24.24           ~ 13 0
91 2MASS J18300209+0113587 Y*O 18 30 02.095 +01 13 58.79           ~ 20 0
92 2MASS J18300274+0112280 Y*O 18 30 02.747 +01 12 28.06           ~ 27 2

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2022.08.10-06:33:21

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