2004A&A...427..651D


C.D.S. - SIMBAD4 rel 1.7 - 2020.10.21CEST15:37:24

2004A&A...427..651D - Astronomy and Astrophysics, volume 427, 651-665 (2004/11-4)

Multiple protostellar systems. I. A deep near infrared survey of Taurus and Ophiuchus protostellar objects.

DUCHENE G., BOUVIER J., BONTEMPS S., ANDRE P. and MOTTE F.

Abstract (from CDS):

We performed a deep infrared imaging survey of 63 embedded young stellar objects (YSOs) located in the Taurus and Ophiuchus clouds to search for companions. The sample includes Class I and flat infrared spectrum protostellar objects. We find 17 companions physically bound to 15 YSOs with angular separations in the range 0.8-10" (110-1400AU) and derive a companion star fraction of 23±9% and 29±7% for embedded YSOs in Taurus and Ophiuchus, respectively, about twice as large as that found among G dwarfs in the solar neighborhood. Therefore, binary and multiple protostellar systems are a very frequent outcome of the fragmentation of prestellar cores. In spite of different properties of the clouds and especially of the prestellar cores, the fraction of wide companions, 27±6% for the combined sample, is identical in the two star-forming regions. This suggests that the frequency and properties of wide multiple protostellar systems are not very sensitive to specific initial conditions. Comparing the companion star fraction of the youngest YSOs still surrounded by extended envelopes to that of more evolved YSOs, we find evidence for a possible evolution of the fraction of wide multiple systems, which seems to decrease by a factor of about two on a timescale of ∼105yr. For the first time it is possible to confront the result of a multiplicity survey of a nearly complete population of embedded YSOs at an age of ∼105 yr to numerical simulations of molecular cloud collapse which, after a few free fall times, reach this evolutionary stage. Somewhat contrary to model predictions, we do not find evidence for a sub-clustering of embedded sources at this stage on a scale of a few 100AU that could be related to the formation of small-N protostellar clusters. Possible interpretations of this discrepancy are discussed.

Abstract Copyright:

Journal keyword(s): stars: formation - stars: binaries: visual - stars: pre-main sequence

Simbad objects: 150

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Number of rows : 150

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 NAME HH 7-11 MMS 2 smm 03 29 03.056 +31 15 51.67           ~ 68 0
2 V* V512 Per Or* 03 29 03.7567945196 +31 16 03.959183877           ~ 352 0
3 IRAS 04016+2610 Y*O 04 04 43.07064 +26 18 56.3904           ~ 236 0
4 NAME IRAS 04108+2803B Y*O 04 13 54.71688 +28 11 32.8992           K0-M3 36 0
5 IRAS 04108+2803 mul 04 13 54.9 +28 11 31           ~ 89 1
6 IRAS 04113+2758 ** 04 14 26.31 +28 06 04.5           ~ 57 0
7 IRAS 04158+2805 Y*O 04 18 58.1407377664 +28 12 23.347645825           M5.25 88 0
8 IRAS 04169+2702 Y*O 04 19 58.44936 +27 09 57.0672           K0-M4 104 1
9 NAME IRAS 04181+2654B Y*O 04 21 10.38840 +27 01 37.2576           K5-M4 22 0
10 IRAS 04181+2655 mul 04 21 10.9 +27 02 06           ~ 50 0
11 IRAS 04181+2654 Y*O 04 21 11.46888 +27 01 09.4044           G0-M3 58 0
12 IRAS 04191+1523 Y*O 04 22 00.43944 +15 30 21.2148           ~ 186 0
13 IRAS 04239+2436 Y*O 04 26 56.29704 +24 43 35.3280           ~ 148 0
14 IRAS 04248+2612 Y*O 04 27 57.30696 +26 19 18.3036           M 144 0
15 IRAS 04260+2642 Y*O 04 29 04.9905794928 +26 49 06.897053333           K6 48 0
16 IRC +20082 AB* 04 29 07.6289350401 +24 43 50.032473131   20.57 17.37   10.45 M8III 72 0
17 V* GV Tau TT* 04 29 23.7314759229 +24 33 00.216016292 19.20         K7 272 2
18 NAME Tau-Aur Complex SFR 04 30 +25.0           ~ 1226 0
19 IRAS 04295+2251 Y*O 04 32 32.05488 +22 57 26.6724           K0-M4 87 0
20 IRAS 04302+2247 Y*O 04 33 16.50096 +22 53 20.4000           ~ 136 0
21 IRAS 04325+2402 Y*O 04 35 35.39160 +24 08 19.4244           ~ 151 0
22 IRAS 04361+2547 Y*O 04 39 13.89767 +25 53 20.6340           ~ 185 1
23 IRAS 04365+2535 Y*O 04 39 35.19360 +25 41 44.7252           ~ 241 0
24 NAME Taurus Complex SFR 04 41.0 +25 52           ~ 3542 0
25 IRAS 04381+2540 Y*O 04 41 12.67920 +25 46 35.4216           K0-M2 120 1
26 Haro 6-33 TT* 04 41 38.8300758211 +25 56 26.681998749     18.40     M0.5 101 2
27 IRAS 04489+3042 Y*O 04 52 06.6859847880 +30 47 17.016855701           M2 62 0
28 NAME Trapezium Cluster As* 05 35 16.5 -05 23 14           ~ 1483 1
29 [SKS95] 162300.0-241834 Y*O 16 26 01.3663365059 -24 25 20.939925891           ~ 20 0
30 BKLT J162607-242725 Y*O 16 26 07.04280 -24 27 24.1848           ~ 20 1
31 BKLT J162607-242742 Y*O 16 26 07.63968 -24 27 41.3676           ~ 18 1
32 GSS 29 TT* 16 26 16.8584457266 -24 22 23.154122364       17.4 15.23 K5-K6 76 1
33 CRBR 2315.8-1700 Y*O 16 26 17.22936 -24 23 45.3660           ~ 36 0
34 BKLT J162618-241712 TT* 16 26 18.62064 -24 17 10.2912           ~ 4 0
35 CRBR 2317.3-1925 Y*O 16 26 18.82056 -24 26 10.5216           M7 40 0
36 Elia 2-20 TT* 16 26 18.8782824640 -24 28 19.698059817           ~ 93 1
37 CRBR 2317.6-1622 TT* 16 26 18.97296 -24 23 07.5048           ~ 7 0
38 CRBR 2317.5-1729 Y*O 16 26 18.98232 -24 24 14.2596           ~ 39 0
39 BKLT J162621-241544 TT* 16 26 21.0288455544 -24 15 41.487346014           ~ 9 0
40 GSS 30 Y*O 16 26 21.38160 -24 23 04.0524           ~ 200 1
41 [GY92] 5 Y*O 16 26 21.5389368381 -24 26 01.000528521       18.30 15.80 M7 59 1
42 [JJK2008] SMM J162622-24225 smm 16 26 21.60 -24 22 54.8           ~ 40 0
43 [CHG85] GSS 30 IRS 3 Y*O 16 26 21.77376 -24 22 51.3948           ~ 56 0
44 [RR90] Oph 2320.8-1721 Y*O 16 26 22.26912 -24 24 07.0632           M8 64 0
45 VSSG 12 Y*O 16 26 22.38552 -24 22 52.9464           ~ 52 0
46 [GY92] 15 Y*O 16 26 22.95576 -24 28 46.1496           M6 22 0
47 [GY92] 21 Y*O 16 26 23.57976 -24 24 39.4956           K7 62 2
48 GSS 32 TT* 16 26 24.0521249616 -24 24 48.105099750       17.81 15.58 K5-K6 95 1
49 Elia 2-24 TT* 16 26 24.0896068058 -24 16 13.456681632   16.3 14.40 15.81 13.97 K6 126 1
50 [GY92] 29 Y*O 16 26 25.28280 -24 24 45.0072           ~ 23 1
51 VSSG 29 Y*O 16 26 27.8166288668 -24 26 41.866584968         17.85 M5 36 1
52 VSSG 27 Y*O 16 26 30.46896 -24 22 57.1440           M 57 1
53 GSS 35 TT* 16 26 34.1750440278 -24 23 28.331873112     16.53 14.75 12.51 B3 217 1
54 VSSG 4 Y*O 16 26 37.78680 -24 23 00.7476           ~ 27 0
55 [GY92] 91 Y*O 16 26 40.46952 -24 27 14.4720           ~ 60 1
56 GSS 38 TT* 16 26 41.95872 -24 18 00.1404           ~ 8 0
57 WL 8 Y*O 16 26 42.01776 -24 33 26.2332           ~ 21 0
58 [GY92] 101 Y*O 16 26 42.43920 -24 26 25.8972           ~ 27 1
59 VSSG 11 TT* 16 26 43.7653879512 -24 16 33.287042569           ~ 45 1
60 VSSG 30 Y*O 16 26 44.19504 -24 34 48.3492           ~ 129 0
61 WL 2 Y*O 16 26 48.48624 -24 28 38.9064           ~ 51 1
62 [GY92] 130 TT* 16 26 48.74688 -24 26 25.5192           ~ 7 0
63 WL 18 TT* 16 26 48.9801383800 -24 38 25.150629987       19.33 17.38 M3.5 62 0
64 YLW 1A TT* 16 26 51.1109449971 -24 20 50.752881529           ~ 9 0
65 BBRCG 13 Y*O 16 26 51.97104 -24 30 39.4956           ~ 23 1
66 BBRCG 14 Y*O 16 26 53.46936 -24 32 36.2472           ~ 23 1
67 [GY92] 152 Y*O 16 26 54.29328 -24 24 38.1636           ~ 12 0
68 VSSG 5 Y*O 16 26 54.44376 -24 26 20.7204           ~ 40 1
69 [GY92] 154 Y*O 16 26 54.77088 -24 27 02.2464           M6 22 0
70 GSS 41 TT* 16 26 55.31160 -24 20 27.8124           ~ 13 0
71 BBRCG 16 TT* 16 26 56.91984 -24 28 37.0740           M2.5 16 0
72 WL 21 Y*O 16 26 57.33000 -24 35 38.8032           M6 40 0
73 CRBR 2356.6-3058 Y*O 16 26 58.27872 -24 37 40.9584           ~ 21 0
74 YLW 1C Y*O 16 26 58.39608 -24 21 29.9808           M6 32 0
75 BKLT J162658-241836 Y*O 16 26 58.63896 -24 18 34.6644           M4.5 22 1
76 WL 14 Y*O 16 26 59.04984 -24 35 56.8788           ~ 50 0
77 WL 22 TT* 16 26 59.16720 -24 34 58.8072           ~ 64 0
78 VSSG 8 TT* 16 27 01.61856 -24 21 37.0404           ~ 16 0
79 WL 16 Y*O 16 27 02.33520 -24 37 27.2316           A0-F3 153 0
80 [GY92] 188 Y*O 16 27 03.00720 -24 26 14.6976           ~ 24 1
81 BKLT J162703-242007 Y*O 16 27 03.59088 -24 20 05.4456           M1.5 16 0
82 VSSG 31 Y*O 16 27 04.10688 -24 28 29.9136           ~ 56 1
83 [GY92] 195 Y*O 16 27 04.57464 -24 27 15.6636           ~ 29 1
84 [GY92] 197 Y*O 16 27 05.24616 -24 36 29.7936           ~ 59 1
85 BKLT J162705-244013 Y*O 16 27 05.67576 -24 40 13.0908           ~ 16 0
86 YLW 10A TT* 16 27 05.97576 -24 26 18.5172           ~ 21 1
87 WL 17 Y*O 16 27 06.77616 -24 38 14.9964           ~ 85 0
88 [GY92] 207 TT* 16 27 07.95504 -24 40 29.1396           ~ 6 0
89 [GY92] 213 Y*O 16 27 09.35328 -24 40 22.4292           ~ 28 0
90 Elia 2-29 Y*O 16 27 09.43032 -24 37 18.7716           ~ 267 1
91 WLY 1-43 Y*O 16 27 11.17992 -24 40 46.6680           ~ 54 0
92 WL 19 Y*O 16 27 11.71416 -24 38 32.0604           ~ 66 0
93 WLY 2-33 Y*O 16 27 14.50512 -24 26 46.0860           ~ 30 0
94 YLW 10B Y*O 16 27 15.45432 -24 26 39.8004           ~ 45 0
95 WLY 2-35 Y*O 16 27 15.51408 -24 30 53.6832           ~ 29 0
96 WL 20 Y*O 16 27 15.69840 -24 38 43.4364           ~ 78 0
97 NAME WL 20E Y*O 16 27 15.87648 -24 38 43.3896           ~ 71 0
98 YLW 10C Y*O 16 27 15.88488 -24 25 14.1924           ~ 25 0
99 YLW 12A Y*O 16 27 17.57160 -24 28 56.2944           ~ 64 0
100 WL 5 TT* 16 27 18.17064 -24 28 52.6800           ~ 88 0
101 [GY92] 248 Y*? 16 27 18.37560 -24 24 26.3124           ~ 12 0
102 BBRCG 39 Y*O 16 27 18.38040 -24 39 14.6844           ~ 36 0
103 WL 3 Y*O 16 27 19.21584 -24 28 43.8528           K7 60 0
104 EM* SR 12 Or* 16 27 19.5054789229 -24 41 40.414828505     13.28 12.15 10.855 M0IVe 168 1
105 YLW 13B Y*O 16 27 21.46872 -24 41 43.0692           ~ 86 0
106 WL 6 Y*O 16 27 21.80448 -24 29 53.3616           ~ 111 0
107 [GY92] 258 TT* 16 27 24.39000 -24 41 47.5620           ~ 23 0
108 CRBR 2422.8-3423 Y*O 16 27 24.61320 -24 41 03.4080           ~ 81 1
109 [GY92] 260 Y*O 16 27 26.28552 -24 42 46.1304           ~ 23 0
110 YLW 16C Y*O 16 27 26.48952 -24 39 23.0760           M1 56 0
111 YLW 15B Y*O 16 27 26.61768 -24 40 45.1524           ~ 29 0
112 [JWM2000] SMM J16274-2440 PoC 16 27 26.70 -24 40 52.3           ~ 21 0
113 YLW 15 Y*O 16 27 26.93640 -24 40 50.8224           ~ 241 1
114 Elia 2-31 TT* 16 27 27.3790999869 -24 31 16.473626072           ~ 64 1
115 YLW 16A Y*O 16 27 28.02744 -24 39 33.5052           K8 185 0
116 Elia 2-32 Y*O 16 27 28.44576 -24 27 21.0348           K6.5 104 1
117 YLW 16B Y*O 16 27 29.43528 -24 39 16.1892           ~ 102 0
118 Elia 2-33 Y*O 16 27 30.18024 -24 27 43.3656           M2 109 1
119 ISO-Oph 150 TT* 16 27 30.91152 -24 27 33.1956           ~ 14 0
120 BBRCG 61 Y*O 16 27 32.85048 -24 32 34.8324           ~ 30 0
121 YLW 18 TT* 16 27 33.1158717225 -24 41 15.261194836       17.66 15.65 K5-K6 63 0
122 [GY92] 295 TT* 16 27 35.2624006505 -24 38 33.439591125       16.16 14.08 M4.5 33 0
123 IRAS 16245-2423 TT* 16 27 37.1911764648 -24 30 35.031583716       16.66 14.67 B5-F2 237 0
124 [GY92] 301 Y*O 16 27 37.24944 -24 42 38.0160           ~ 32 0
125 [GY92] 310 Y*O 16 27 38.6280925403 -24 38 39.230714152         17.40 M8 60 0
126 [GY92] 312 Y*O 16 27 38.94456 -24 40 20.6724           M2.5 38 0
127 YLW 45 Y*O 16 27 39.82824 -24 43 15.0672           ~ 107 0
128 BKLT J162741-244645 Y*O 16 27 41.61024 -24 46 44.7420           ~ 17 0
129 [GY92] 323 Y*O 16 27 41.75280 -24 43 36.0984           ~ 19 0
130 [GY92] 326 TT* 16 27 42.7019471651 -24 38 50.620859523         17.30 M2 38 0
131 WLY 2-53 TT* 16 27 43.78392 -24 43 08.0544           ~ 13 0
132 [GY92] 344 Y*O 16 27 45.78672 -24 44 53.8620           M6 27 0
133 [GY92] 350 Y*O 16 27 46.2918321741 -24 31 41.264641200           M7.5 35 0
134 [GY92] 352 Y*O 16 27 47.09496 -24 45 35.0676           ~ 21 0
135 [GY92] 370 TT* 16 27 49.9689327461 -24 44 16.965777286           ~ 9 0
136 YLW 52 Y*O 16 27 51.80472 -24 31 45.5304           ~ 61 0
137 [GY92] 377 Y*O 16 27 51.8959543237 -24 46 30.005519039           ~ 14 0
138 [GY92] 412 TT* 16 27 57.87480 -24 36 02.2140           ~ 7 0
139 [GY92] 450 Y*O 16 28 03.55560 -24 34 38.6148           M6 14 0
140 [GY92] 463 TT* 16 28 04.64592 -24 34 56.0964           ~ 16 0
141 [GY92] 472 TT* 16 28 05.77704 -24 33 54.9900           ~ 8 0
142 NAME Ophiuchus Molecular Cloud SFR 16 28 06 -24 32.5           ~ 3063 0
143 ISO-Oph 200 Y*O 16 31 43.7601980245 -24 55 24.587358028           ~ 14 0
144 ISO-Oph 201 TT* 16 31 48.92688 -24 54 29.2500           ~ 6 0
145 ISO-Oph 204 TT* 16 31 52.1212410606 -24 56 15.712413458           ~ 35 0
146 ISO-Oph 203 Y*O 16 31 52.44696 -24 55 36.0804           ~ 12 0
147 ISO-Oph 205 TT* 16 31 53.43552 -24 55 05.0736           ~ 6 0
148 ISO-Oph 208 TT* 16 31 59.3297095595 -24 54 40.646649360           ~ 6 0
149 WLY 2-67 Y*O 16 32 00.99624 -24 56 41.9640           ~ 55 0
150 ISO-Oph 210 Y*O 16 32 02.21712 -24 56 16.8144           ~ 4 0

    Equat.    Gal    SGal    Ecl

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2020.10.21-15:37:24

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