2013MNRAS.436.1694R

Query : 2013MNRAS.436.1694R

2013MNRAS.436.1694R - Mon. Not. R. Astron. Soc., 436, 1694-1707 (2013/December-1)

Long-baseline interferometric multiplicity survey of the Sco-Cen OB association.

RIZZUTO A.C., IRELAND M.J., ROBERTSON J.G., KOK Y., TUTHILL P.G., WARRINGTON B.A., HAUBOIS X., TANGO W.J., NORRIS B., TEN BRUMMELAAR T., KRAUS A.L., JACOB A. and LALIBERTE-HOUDEVILLE C.

Abstract (from CDS):

We present the first multiplicity-dedicated long-baseline optical interferometric survey of the Scorpius-Centaurus-Lupus-Crux association. We used the Sydney University Stellar Interferometer to undertake a survey for new companions to 58 Sco-Cen B-type stars and have detected 24 companions at separations ranging from 7 to 130mas, 14 of which are new detections. Furthermore, we use a Bayesian analysis and all available information in the literature to determine the multiplicity distribution of the 58 stars in our sample, showing that the companion frequency is f = 1.35±0.25 and the mass ratio distribution is best described by qγ with γ = -0.46, agreeing with previous Sco-Cen high-mass work and differing significantly from lower mass stars in Tau-Aur. Based on our analysis, we estimate that among young B-type stars in moving groups, up to 23 percent are apparently single stars. This has strong implications for the understanding of high-mass star formation, which requires angular momentum dispersal through some mechanism such as formation of multiple systems.

Abstract Copyright: © 2013 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society (2013)

Journal keyword(s): methods: statistical - techniques: high angular resolution - techniques: interferometric - binaries: close - stars: formation - open clusters and associations: individual: Sco-Cen

Simbad objects: 72

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Number of rows : 72
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 Tau-Aur Complex SFR 04 30 +25.0           ~ 1453 0
2 * pi. Cen ** 11 21 00.4170807171 -54 29 27.964002014           B5Vn 127 0
3 * j Cen Be* 11 49 41.0673344112 -63 47 18.500667000 3.58 4.160 4.308     B3V 125 0
4 HD 103079 Pu* 11 51 51.2242408032 -65 12 21.276443520 4.19 4.85 4.99     B4V 86 0
5 HD 105382 Be* 12 08 05.2222663992 -50 39 40.575451536 3.65 4.32 4.47 4.53 4.70 B5V 186 0
6 * del Cen Be* 12 08 21.4976373 -50 43 20.738614 1.51 2.39 2.52 2.48 2.62 B2Vne 320 0
7 * rho Cen Pu* 12 11 39.1197479712 -52 22 06.384420264 3.20 3.81 3.96 4.05 4.21 B3V 136 0
8 * del Cru Pu* 12 15 08.7184790676 -58 44 56.126676618 1.63 2.568 2.752     B2IV 223 1
9 * zet Cru Pu* 12 18 26.2420745160 -64 00 11.107331280 3.26 3.90 4.05     B2/3V 120 0
10 NAME Lower Centaurus Crux As* 12 19 -57.1           ~ 565 1
11 * G Cen Pu* 12 26 31.7600444794 -51 27 02.288916487 4.02 4.654 4.808     B3V(n) 93 0
12 * alf Cru SB* 12 26 35.89522 -63 05 56.7343           B0.5IV+B1V 99 0
13 * alf01 Cru * 12 26 35.896 -63 05 56.73   1.10 1.28     B0.5IV 150 0
14 * alf02 Cru * 12 26 36.442 -63 05 58.28   1.41 1.58     B1V 75 0
15 * sig Cen ** 12 28 02.3821158564 -50 13 50.296708174 2.95 3.72 3.91 4.02 4.22 B2V 175 0
16 * gam Mus SB* 12 32 28.0129260853 -72 07 58.763241944 3.12 3.73 3.88 3.91 4.08 B5V+A: 155 0
17 * alf Mus ** 12 37 11.0178886 -69 08 08.033239 1.62 2.484 2.649     B2IV 163 1
18 * bet Mus ** 12 46 16.80410 -68 06 29.2164 2.13     5.51   B2V+B3V 129 0
19 HD 110956 Pu* 12 46 22.7144465193 -56 29 19.735770746 3.86 4.462 4.620     B2/3V 130 0
20 2MASS J12474011-5940441 SB* 12 47 40.1181037752 -59 40 44.230374408           ~ 5 0
21 * bet Cru bC* 12 47 43.26877 -59 41 19.5792 0.03 1.02 1.25 1.38 1.64 B1IV 360 1
22 * mu.01 Cru Pu* 12 54 35.6242611666 -57 10 40.528916907 3.12 3.87 4.04 4.14 4.38 B2IV-V 159 0
23 * mu.02 Cru Be* 12 54 36.8841589536 -57 10 07.193918388 4.59 5.09 5.20 5.00 5.06 B5Vne 189 0
24 * lam Cru Be* 12 54 39.1827302030 -59 08 48.129223088 3.86 4.451 4.602     B3Vne 150 1
25 * f Cen Pu* 13 06 16.7036641232 -48 27 47.846528742 4 4.552 4.691     B4V 121 0
26 V* V1155 Cen Or* 13 06 17.8394885472 -48 27 45.439240680   11.62 10.80     ~ 23 0
27 * ksi02 Cen SB* 13 06 54.6394033029 -49 54 22.487112422 3.29 4.08 4.27     B3V 150 0
28 * eps Cen bC* 13 39 53.25774 -53 27 59.0081 1.16 2.08 2.30 2.45 2.70 B1III 259 0
29 * nu. Cen bC* 13 49 30.2765077433 -41 41 15.750707249 2.31 3.188 3.386     B2V 213 0
30 * mu. Cen Be* 13 49 36.9886872492 -42 28 25.440271450 2.37 3.27 3.43 3.41 3.50 B2Vnpe 453 0
31 * 3 Cen ** 13 51 49.60136 -32 59 38.7067           B5III+B9IV 256 0
32 * h Cen SB* 13 53 12.5382897240 -31 55 39.430392240 4.04 4.59 4.73     B5IVp 108 0
33 * phi Cen Pu* 13 58 16.2661773764 -42 06 02.724906325 2.79 3.608 3.802     B2IV 166 0
34 * ups01 Cen Pu* 13 58 40.7486851 -44 48 12.908967 2.87 3.67 3.87 4.01 4.22 B2IV-V 157 0
35 * chi Cen bC* 14 06 02.7680367867 -41 10 46.678474802 3.4 4.155 4.343     B2V 231 1
36 * iot Lup V* 14 19 24.2211609376 -46 03 29.139332461 2.65 3.355 3.529     B2.5IV 120 0
37 * a Cen Ro* 14 23 02.2387240143 -39 30 42.544559700 3.50 4.24 4.42 4.53 4.70 B2V 289 0
38 * tau01 Lup bC* 14 26 08.2244287979 -45 13 17.123883210 3.68 4.393 4.553     B2IV 158 0
39 * sig Lup El* 14 32 37.0550628352 -50 27 25.733667127 3.39 4.240 4.423     B1/B2V 122 0
40 * eta Cen Be* 14 35 30.4241610 -42 09 28.170782 1.30 2.12 2.31 2.41 2.59 B2Ve 361 1
41 * rho Lup V* 14 37 53.2261607412 -49 25 32.981831985 3.34 3.90 4.05 4.14 4.25 B3/4V 112 0
42 2MASS J14415376-4723331 * 14 41 53.7623573520 -47 23 33.172935000           ~ 1 0
43 * alf Lup bC* 14 41 55.7557866 -47 23 17.515486 1.22 2.126 2.286     B1.5III 247 0
44 * b Cen ** 14 41 57.5905450998 -37 47 36.580200460 3.14 3.83 4.00 4.11 4.26 B2.5V 159 0
45 * omi Lup ** 14 51 38.3028905 -43 34 31.296546 3.59 4.164 4.313     B5IV 123 0
46 HD 131120 Pu* 14 52 51.0731473122 -37 48 11.382138696 4.11 4.855 5.015     B7IIIp 134 0
47 * bet Lup ** 14 58 31.92536 -43 08 02.2699 1.59 2.46 2.68 2.78 2.95 B2IV 197 0
48 * kap Cen bC* 14 59 09.6849382 -42 06 15.106919 2.15 2.93 3.11     B2IV 212 0
49 * lam Lup SB* 15 08 50.6128505350 -45 16 47.500979673 3.18 3.88 4.05     B3V 147 0
50 * e Lup SB* 15 12 49.5875193435 -44 30 01.490425801 3.98 4.638 4.806     B3IV/V 90 0
51 * del Lup bC* 15 21 22.3138254072 -40 38 51.109328940 2.12 2.995 3.190     B1.5IV 230 0
52 * eps Lup bC* 15 22 40.8682566 -44 41 22.614637 2.46 3.191 3.366     B3IV+B3:V 193 0
53 * eps Lup C * 15 22 41.3567453712 -44 41 48.336951048         8.74 A5V 5 0
54 * phi02 Lup * 15 23 09.3506362429 -36 51 30.557900083 3.77 4.39 4.54 4.60 4.74 B4V 139 0
55 NAME Upper Centaurus Lupus MGr 15 24 -41.9           ~ 567 1
56 * gam Lup ** 15 35 08.44835 -41 10 00.3247 1.76 2.586 2.765     B2IV 187 0
57 * d Lup Be* 15 35 53.24806 -44 57 30.1982 3.68     6.70   B3V 129 0
58 * tau Lib SB* 15 38 39.3694957 -29 46 39.895604   3.481 3.642     B2.5V 170 0
59 * psi02 Lup SB* 15 42 41.0197420380 -34 42 37.467073334 4.08 4.576 4.721     B5V 122 0
60 * rho Sco SB* 15 56 53.0772000457 -29 12 50.667996815 2.84 3.66 3.86 3.97 4.17 B2IV-V 221 0
61 * pi. Sco SB* 15 58 51.1132378 -26 06 50.788602 1.82 2.71 2.91 3.00 3.20 B1V+B2:V: 415 0
62 * eta Lup bC? 16 00 07.3279160436 -38 23 48.138224969 2.36 3.19 3.41     B2.5IV 186 0
63 * del Sco SB* 16 00 20.00528 -22 37 18.1431 1.30 2.20 2.32 2.36 2.49 B0.3IV 776 0
64 HD 143699 * 16 03 24.1895252119 -38 36 09.141541952 4.18 4.75 4.89 4.96 5.10 B5/7III/IV 154 0
65 * tet Lup Pu* 16 06 35.5439828160 -36 48 08.173906632 3.36 4.027 4.201     B2.5Vn 130 0
66 NAME Upper Sco Association As* 16 12 -23.4           ~ 1586 1
67 * c02 Sco SB* 16 12 18.2046168820 -27 55 34.953285603 3.66 4.413 4.568     B2V 201 0
68 NAME Upper Sco-Cen As* 16 15 -24.2           ~ 1497 1
69 NAME Ophiuchus Molecular Cloud SFR 16 28 06 -24 32.5           ~ 3969 1
70 * tau Sco * 16 35 52.9528530 -28 12 57.661515 1.55 2.56 2.81 2.93 3.18 B0V 959 0
71 * mu.02 Sco bC? 16 52 20.1453198 -38 01 03.125839 2.52 3.343 3.542     B2IV 161 0
72 * kap Sco bC* 17 42 29.27520 -39 01 47.9391 1.32 2.211 2.386     B1.5III 250 0

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