2018MNRAS.478.1825D


C.D.S. - SIMBAD4 rel 1.7 - 2020.01.22CET09:10:29

2018MNRAS.478.1825D - Mon. Not. R. Astron. Soc., 478, 1825-1836 (2018/August-1)

Is stellar multiplicity universal? Tight stellar binaries in the Orion nebula Cluster.

DUCHENE G., LACOUR S., MORAUX E., GOODWIN S. and BOUVIER J.

Abstract (from CDS):

We present a survey for the tightest visual binaries among 0.3-2 M members of the Orion nebula Cluster (ONC). Among 42 targets, we discovered 13 new 0.025-0.15 arcsec companions. Accounting for the Branch bias, we find a companion star fraction (CSF) in the 10-60 au range of 21+8–5 per cent, consistent with that observed in other star-forming regions (SFRs) and twice as high as among field stars; this excess is found with a high level of confidence. Since our sample is dominated by disc-bearing targets, this indicates that disc disruption by close binaries is inefficient, or has not yet taken place, in the ONC. The resulting separation distribution in the ONC drops sharply outside 60 au. These findings are consistent with a scenario in which the initial multiplicity properties, set by the star formation process itself, are identical in the ONC and in other SFRs and subsequently altered by the cluster's dynamical evolution. This implies that the fragmentation process does not depend on the global properties of a molecular cloud, but on the local properties of prestellar cores, and that the latter are self-regulated to be nearly identical in a wide range of environments. These results, however, raise anew the question of the origin of field stars as the tight binaries we have discovered will not be destroyed as the ONC dissolves into the Galactic field. It thus appears that most field stars formed in regions that differ from well-studied SFRs in the solar neighbourhood, possibly due to changes in core fragmentation on Gyr time-scales.

Abstract Copyright: © 2018 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): binaries: visual - stars: pre-main-sequence - open clusters and associations: individual: Orion Nebula Cluster

Simbad objects: 62

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Number of rows : 62

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 Cl Melotte 20 OpC 03 26 42 +48 48.0           ~ 744 0
2 Cl Melotte 22 OpC 03 47 00 +24 07.0           ~ 2925 0
3 Cl Melotte 25 OpC 04 26 54.00 +15 52 00.0           ~ 2605 0
4 NAME Tau-Aur Region SFR 04 30 +25.0           ~ 1188 1
5 NAME Taurus Dark Cloud SFR 04 41.0 +25 52           ~ 3357 0
6 V* WZ Ori Or* 05 34 19.5485097242 -05 30 19.801784004 18.084 16.800 15.537   12.889 K5e 33 0
7 V* V1956 Ori Or* 05 34 26.1651924875 -05 26 30.370505020   17.289 16.012   12.998 K2-K3e 26 0
8 Brun 259 *iN 05 34 26.1813596316 -05 24 18.985120802 16.427 14.574 13.499   11.323 K7 16 0
9 V* V1432 Ori Or* 05 34 29.2690892575 -05 14 39.677448119 18.028 16.395 15.138   12.391 K4 28 0
10 Brun 302 * 05 34 33.9457800569 -05 28 24.501197502 14.301 13.261 12.472   10.987 K2 27 0
11 Brun 311 Em* 05 34 35.1486521767 -05 32 10.396023129 15.141 14.151 13.301 12.46 11.467 K2IV 29 0
12 Brun 334 pr* 05 34 39.7639432774 -05 24 25.589725695 14.065 12.535 11.606   9.794 K3V+K5V 71 0
13 V* IX Ori Or* 05 34 40.8649507843 -05 22 42.307245151 14.801 14.891 14.062   11.806 K1e 69 0
14 V* V2073 Ori Or* 05 34 54.9427808457 -05 17 01.809992926   17.950 16.683   13.406 K4-K6e 25 0
15 V* KM Ori TT* 05 34 55.9722690466 -05 23 13.040121857 14.142 12.883 11.918   10.064 K5Ve 82 0
16 NAME Orion Nebula Cluster OpC 05 35.0 -05 29           ~ 1922 1
17 V* V403 Ori Or* 05 35 02.3858578279 -05 15 47.939118367 17.583 15.577 14.133   10.990 K3 35 0
18 V* KZ Ori Or* 05 35 02.9990606958 -05 30 01.477935100 16.525 15.054 14.103 13.02 11.751 K1.5 43 0
19 V* V2144 Ori Or* 05 35 04.7688594475 -05 17 42.279897990   19.095 17.645   13.991 K5 33 0
20 V* V480 Ori Or* 05 35 05.7297353611 -05 24 18.500713713 15.788 15.749 15.023 14.74 12.810 K4:e 39 1
21 COUP 262 * 05 35 06.2817443816 -05 22 02.666011260   14.2 18.810   14.347 K5 39 0
22 V* V1326 Ori BY* 05 35 09.7683440740 -05 23 26.899188471 16.267 14.776 13.806   11.678 K8 56 0
23 V* LS Ori Or* 05 35 10.4291304164 -05 38 24.703320674 14.907 13.979 13.095   10.988 G4-G6 24 0
24 V* V1487 Ori Or* 05 35 10.506 -05 22 45.54   15.896 14.820   12.201 M0.5 45 0
25 V* LU Ori Or* 05 35 11.4963856167 -05 26 02.387177088 16.158 14.823 13.781   11.454 M1 44 0
26 V* V488 Ori Or* 05 35 13.6039945930 -05 30 57.667592926 14.704 13.926 13.153 12.72 11.395 G7:e 64 0
27 2MASS J05351362-0519548 Y*O 05 35 13.6239501996 -05 19 54.816011026   14.0 18.903   13.964 K5 39 0
28 V* V1496 Ori FU* 05 35 13.8001039312 -05 22 07.024932180   16.184 14.987   12.289 K2e-m4 48 0
29 Parenago 1822 *iN 05 35 14.07 -05 22 36.6     15.906   12.799 M3 46 0
30 Parenago 1843 Y*O 05 35 14.3946416434 -05 23 33.627095373     15.052   12.251 M1 43 0
31 Parenago 1839 *iN 05 35 14.64 -05 22 33.7   15.891 14.779   12.008 K7 49 0
32 V* MO Ori Or* 05 35 14.6813176728 -05 39 10.976454338 14.543 13.437 12.640   11.028 ~ 37 0
33 V* V1330 Ori BY* 05 35 14.90 -05 22 39.2   15.040 13.940   11.632 K4 65 0
34 V* V1501 Ori Or* 05 35 15.5536588458 -05 25 14.150036747   15.163 14.077   11.527 K4-M1 50 0
35 Parenago 1867 Y*O 05 35 15.83370 -05 23 22.4207     13.645   12.102 Ke 75 1
36 Parenago 1895 *iN 05 35 16.3761310695 -05 24 03.352207848     14.06     K4-K7 32 0
37 * tet01 Ori C ** 05 35 16.46375 -05 23 22.8486 4.20 5.15 5.13 4.91 4.73 O7Vp 1262 1
38 NAME Trapezium Cluster As* 05 35 16.5 -05 23 14           ~ 1440 1
39 Parenago 1886 Em* 05 35 16.8916564433 -05 22 22.442365401   16.263 15.023   12.348 M0 33 0
40 Parenago 1894 Y*O 05 35 16.97 -05 23 37.0 15.006 14.944 14.492   12.593 M2e 75 0
41 Parenago 1888 Y*O 05 35 16.9772755651 -05 23 00.968295134   16.348 15.206   12.509 M0 39 0
42 V* AE Ori Or* 05 35 17.2187907436 -05 21 31.713678048           K4-K7 47 0
43 V* V1509 Ori Or* 05 35 17.5231320547 -05 17 40.050707797   14.6 19.757   14.065 K2-K3 35 0
44 V* MT Ori Or* 05 35 17.9484704886 -05 22 45.471640008 14.524 13.208 12.229   10.063 K2 90 0
45 V* AF Ori Or* 05 35 18.6662798791 -05 23 13.945021737         12.526 K2-K5e 47 0
46 Parenago 1936 * 05 35 19.3012431200 -05 20 07.868554798 16.762 16.209 15.480   12.933 K2 29 0
47 V* V2356 Ori Or* 05 35 19.6593467673 -05 24 26.605475821     15.711 13.17 12.835 M1.2e 53 0
48 V* V491 Ori Or* 05 35 20.0527592160 -05 21 05.915174797   16.647 15.421   12.533 K7 40 0
49 V* V1523 Ori Or* 05 35 21.3936006569 -05 26 44.072382151 16.740 14.918 13.896 12.82 11.760 K6 47 0
50 2MASS J05352380-0523342 Y*O 05 35 23.807 -05 23 34.30   13.2 16.651   13.509 M1e 25 1
51 V* V2423 Ori Or* 05 35 24.4382267468 -05 24 39.864026227   15.834 15.162   12.583 M0e 56 1
52 V* V2463 Ori Or* 05 35 27.3029693260 -05 23 36.626690972   16.708 15.626   12.805 K4 31 0
53 V* V420 Ori Or* 05 35 28.2056329283 -05 24 58.194007949 15.690 15.990 15.015   12.721 K7e 42 0
54 V* V2483 Ori Or* 05 35 29.8338293926 -05 32 53.507448347 14.293 13.244 12.495   10.902 G8V 39 0
55 LDN 1641 MoC 05 39.0 -07 00           ~ 421 0
56 NGC 2024 Cl* 05 41 43 -01 50.5           ~ 1060 1
57 M 78 RNe 05 46 45.8 +00 04 45   8.0       ~ 337 0
58 NGC 2071 RNe 05 47 10 +00 18.0           ~ 606 1
59 NGC 2632 OpC 08 40 24 +19 40.0           ~ 1191 0
60 NAME beta Pic Moving Group MGr 14 30 -42.0           ~ 532 0
61 NAME Upper Sco Association As* 16 12 -23.4           ~ 971 1
62 NAME Ophiuchus Molecular Cloud SFR 16 28 06 -24 32.5           ~ 2959 0

    Equat.    Gal    SGal    Ecl

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2020.01.22-09:10:29

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