2017A&A...597A..90D


C.D.S. - SIMBAD4 rel 1.7 - 2020.06.04CEST22:49:49

2017A&A...597A..90D - Astronomy and Astrophysics, volume 597A, 90-90 (2017/1-1)

Proper motion survey and kinematic analysis of the ρ Ophiuchi embedded cluster.

DUCOURANT C., TEIXEIRA R., KRONE-MARTINS A., BONTEMPS S., DESPOIS D., GALLI P.A.B., BOUY H., LE CAMPION J.F., RAPAPORT M. and CUILLANDRE J.C.

Abstract (from CDS):

Context. The ρ Ophiuchi molecular complex and in particular the Lynds L1688 dark cloud is unique in its proximity (∼130pc), in its richness in young stars and protostars, and in its youth (0.5Myr). It is certainly one of the best targets currently accessible from the ground to study the early phases of star-formation. Proper motion analysis is a very efficient tool for separating members of clusters from field stars, but very few proper motions are available in the ρ Ophiuchi region since most of the young sources are deeply embedded in dust and gas.
Aims. We aim at performing a kinematic census of young stellar objects (YSOs) in the ρ Ophiuchi F core and partially in the E core of the L1688 dark cloud.
Methods. We run a proper motion program at the ESO New Technology Telescope (NTT) with the Son of ISAAC (SOFI) instrument over nine years in the near-infrared. We complemented these observations with various public image databases to enlarge the time base of observations and the field of investigation to 0.5°x0.5°. We derived positions and proper motions for 2213 objects. From these, 607 proper motions were derived from SOFI observations with a ∼1.8mas/yr accuracy while the remaining objects were measured only from auxiliary data with a mean precision of about ∼3mas/yr.
Results. We performed a kinematic analysis of the most accurate proper motions derived in this work, which allowed us to separate cluster members from field stars and to derive the mean properties of the cluster. From the kinematic analysis we derived a list of 68 members and 14 candidate members, comprising 26 new objects with a high membership probability. These new members are generally fainter than the known ones. We measured a mean proper motion of (µαcosδ, µδ)=(-8.2,-24.3)±0.8mas/yr for the L1688 dark cloud. A supervised classification was applied to photometric data of members to allocate a spectral energy distribution (SED) classification to the unclassified members.
Conclusions. We kinematically confirmed that the 56 members that were known from previous studies of the ρ Ophiuchi F cluster and that were also part of our survey are members of the cluster, and we added 26 new members. We defined the evolutionary status of the unclassified members of the cluster. We showed that a large part (23) of these new members are probably brown dwarfs, which multiplies the number of known substellar objects in the cluster by a factor of 3.3.

Abstract Copyright: © ESO, 2017

Journal keyword(s): proper motions - reference systems - stars: formation - open clusters and associations: individual: ρ Ophiuchi

VizieR on-line data: <Available at CDS (J/A+A/597/A90): table6.dat table7.dat table8.dat refs.dat>

Status at CDS:  

Simbad objects: 107

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Number of rows : 107

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 NGC 5139 GlC 13 26 47.28 -47 28 46.1   6.12 5.33     ~ 2987 0
2 NAME Upper Sco Association As* 16 12 -23.4           ~ 1011 1
3 NAME ASSOC II SCO As* 16 15 -24.2           ~ 1110 1
4 BKLT J162618-245020 * 16 26 18.7424850779 -24 50 24.294764286         16.27 ~ 2 0
5 NAME rho Oph Cluster Cl* 16 26 22 -24 23.7           ~ 49 0
6 [GY92] 73 * 16 26 35.8218106187 -24 45 32.531140332         18.17 ~ 3 0
7 BKLT J162641-245354 * 16 26 41.7275854291 -24 53 58.493475773         16.47 ~ 3 0
8 [GY92] 112 TT* 16 26 44.3013631817 -24 43 14.063146447     17.07 15.15 13.37 M3 31 0
9 BKLT J162644-244711 TT* 16 26 44.4214830718 -24 47 13.727009090       15.72 13.88 M4.5 13 0
10 [GY92] 122 Y*O 16 26 47.0549335086 -24 44 29.783806566       17.41 15.19 M4.5 18 0
11 BKLT J162648-244906 * 16 26 48.90072 -24 49 08.7024           ~ 3 0
12 SONYC RhoOph-1 BD? 16 26 56.33520 -24 42 37.7244           ~ 7 0
13 CFHTWIR-Oph 53 BD* 16 26 56.36976 -24 41 20.4576           L3? 9 0
14 EM* SR 24B TT* 16 26 58.4363490468 -24 45 32.211217104           M0.5e 78 0
15 UGCS J162658.60-244328.5 NIR 16 26 58.60464 -24 43 28.5060           ~ 1 0
16 [GY92] 169 * 16 26 58.6212192092 -24 46 02.844433986           ~ 5 0
17 WL 14 Y*O 16 26 59.04984 -24 35 56.8788           ~ 50 0
18 UGCS J162700.96-244339.5 NIR 16 27 00.96216 -24 43 39.5508           ~ 2 0
19 NAME rho Oph E MoC 16 27 02.0 -24 38 31           ~ 54 0
20 WISE J162702.05-243938.6 * 16 27 02.05 -24 39 38.6           ~ 2 0
21 [GY92] 193 Y*O 16 27 04.5152139620 -24 42 59.673480203       16.69 14.97 K6-M1 28 0
22 [GY92] 194 Y*O 16 27 04.5600221372 -24 42 14.018532542       17.54 15.66 K8-M0 26 0
23 BKLT J162705-244013 Y*O 16 27 05.67576 -24 40 13.0908           ~ 16 0
24 [GY92] 201 Y*O 16 27 06.0449677585 -24 38 12.323069411           ~ 9 0
25 [GY92] 204 Y*O 16 27 06.5924723987 -24 41 48.883697790       17.57 15.43 M5 81 0
26 WL 17 Y*O 16 27 06.77616 -24 38 14.9964           ~ 82 0
27 [GY92] 212 Y*O 16 27 09.3036312037 -24 43 20.047636575           ~ 10 0
28 [GY92] 213 Y*O 16 27 09.35328 -24 40 22.4292           ~ 28 0
29 WL 9 Y*O 16 27 10.34664 -24 33 22.6692           ~ 23 0
30 WLY 1-43 Y*O 16 27 11.17992 -24 40 46.6680           ~ 54 0
31 WL 19 Y*O 16 27 11.71416 -24 38 32.0604           ~ 66 0
32 BKLT J162712-245205 * 16 27 13.0331463901 -24 52 06.735358733           ~ 3 0
33 [GMM2009] Oph L1688 19 Y*O 16 27 13.26048 -24 39 30.4704           ~ 3 0
34 [GY92] 235 Y*O 16 27 13.8208549477 -24 43 31.648188013           M3.5 36 0
35 BKLT J162714-245132 TT* 16 27 14.4886186727 -24 51 33.461634524   18.5 16.44 15.04 13.17 M4.5 34 1
36 BKLT J162715-245137 TT* 16 27 15.1288179688 -24 51 38.809044111   16.9 15.02 13.86 12.38 M2 56 1
37 WLY 2-35 Y*O 16 27 15.51408 -24 30 53.6832           ~ 29 0
38 NAME WL 20E Y*O 16 27 15.87648 -24 38 43.3896           ~ 71 0
39 BKLT J162718-245113 * 16 27 18.3204420771 -24 51 14.102828377         16.33 ~ 3 0
40 WSB 48 TT* 16 27 18.3583335118 -24 54 53.710641892   18.5   14.70 13.23 M3.75 18 0
41 BBRCG 39 Y*O 16 27 18.38040 -24 39 14.6844           ~ 36 0
42 2MASS J16271877-2456063 * 16 27 18.7666162382 -24 56 06.363454497           ~ 1 0
43 WL 3 Y*O 16 27 19.21584 -24 28 43.8528           K7 60 0
44 EM* SR 12 Or* 16 27 19.5054789229 -24 41 40.414828505     13.28 12.15 10.855 M0IVe 165 1
45 NAME SR 12C LM* 16 27 19.66704 -24 41 48.8292           M9.0 30 0
46 BKLT J162721-244648 * 16 27 21.4344523807 -24 46 49.404639243           ~ 3 0
47 YLW 13B Y*O 16 27 21.46872 -24 41 43.0692           ~ 86 0
48 [GY92] 253 Y*O 16 27 21.83064 -24 43 35.6952           M3 28 0
49 BBRCG 43 Y*O 16 27 21.97560 -24 29 39.7716           ~ 27 0
50 WSB 49 TT* 16 27 22.9689016105 -24 48 07.138242529   16.9   15.06 13.31 M4.25 37 0
51 [GY92] 258 TT* 16 27 24.39000 -24 41 47.5620           ~ 23 0
52 CRBR 2422.8-3423 Y*O 16 27 24.61320 -24 41 03.4080           ~ 80 1
53 [GY92] 259 Y*O 16 27 24.63624 -24 29 35.3976           ~ 24 0
54 UGCS J162725.49-243743.3 NIR 16 27 25.49256 -24 37 43.3200           ~ 1 0
55 CFHTWIR-Oph 77 LM* 16 27 25.64400 -24 37 28.5168           M9.75 7 0
56 BKLT J162726-244716 * 16 27 26.02560 -24 47 17.0124           ~ 4 0
57 [GY92] 260 Y*O 16 27 26.28552 -24 42 46.1304           ~ 23 0
58 YLW 16C Y*O 16 27 26.48952 -24 39 23.0760           M1 55 0
59 [GY92] 264 TT* 16 27 26.5817762470 -24 25 54.393628119       17.90 15.72 M8 37 0
60 YLW 15B Y*O 16 27 26.61768 -24 40 45.1524           ~ 28 0
61 YLW 15 Y*O 16 27 26.93640 -24 40 50.8224           ~ 238 1
62 Elia 2-31 TT* 16 27 27.3790999869 -24 31 16.473626072           ~ 64 1
63 EQ J162727.6-243818.6 * 16 27 27.602 -24 38 18.62           ~ 2 0
64 NAME rho Oph B2 Cloud PoC 16 27 27.9 -24 26 29           ~ 73 1
65 [GY92] 270 * 16 27 28.05888 -24 36 29.5956           ~ 6 0
66 UGCS J162728.13-243719.5 NIR 16 27 28.140 -24 37 19.59           ~ 1 0
67 [WMR2005] 3-7 TT* 16 27 28.7288992638 -24 54 31.788541494       16.02 14.32 M4.75 10 0
68 UGCS J162729.07-244747.1 NIR 16 27 29.07264 -24 47 47.1012           ~ 1 0
69 YLW 16B Y*O 16 27 29.43528 -24 39 16.1892           ~ 101 0
70 BBRCG 53 Y*O 16 27 29.96424 -24 33 36.5688           ~ 19 0
71 BKLT J162730-244726 Y*O 16 27 30.8381007993 -24 47 26.799406990       18.32 16.17 M1-M2 22 0
72 BBRCG 58 Y*O 16 27 32.13768 -24 29 43.5696           ~ 18 0
73 [GY92] 288 Y*O 16 27 32.72616 -24 45 00.4248           ~ 12 0
74 BBRCG 61 Y*O 16 27 32.85048 -24 32 34.8324           ~ 30 0
75 YLW 18 TT* 16 27 33.1158717225 -24 41 15.261194836       17.66 15.65 K5-K6 63 0
76 [GY92] 295 TT* 16 27 35.2624006505 -24 38 33.439591125       16.16 14.08 M4.5 33 0
77 [GY92] 296 Y*O 16 27 35.6623113458 -24 45 32.524940178           ~ 12 0
78 [GY92] 301 Y*O 16 27 37.24944 -24 42 38.0160           ~ 31 0
79 NAME rho Oph F MoC 16 27 37.3 -24 42 28           ~ 56 0
80 [GY92] 310 Y*O 16 27 38.6280925403 -24 38 39.230714152         17.40 M8 60 0
81 2MASS J16273868-2451527 * 16 27 38.68728 -24 51 52.7616           ~ 2 0
82 [GY92] 312 Y*O 16 27 38.94456 -24 40 20.6724           M2.5 38 0
83 ROX 27 TT* 16 27 39.4297106587 -24 39 15.527875310       15.76 14.03 M0+M4 92 0
84 BKLT J162741-244645 Y*O 16 27 41.61024 -24 46 44.7420           ~ 17 0
85 2MASS J16274164-2435411 Y*? 16 27 41.64240 -24 35 41.1324           ~ 4 0
86 [GY92] 323 Y*O 16 27 41.75280 -24 43 36.0984           ~ 19 0
87 UGCS J162741.88-244045.2 NIR 16 27 41.88216 -24 40 45.2748           ~ 2 0
88 [GY92] 326 TT* 16 27 42.7019471651 -24 38 50.620859523         17.30 M2 38 0
89 [GY92] 344 Y*O 16 27 45.78672 -24 44 53.8620           ~ 27 0
90 [GY92] 350 Y*O 16 27 46.2918321741 -24 31 41.264641200           M7.5 35 0
91 UGCS J162746.78-244059.1 NIR 16 27 46.78872 -24 40 59.1024           ~ 1 0
92 [GY92] 352 Y*O 16 27 47.09496 -24 45 35.0676           ~ 21 0
93 CFHTWIR-Oph 101 LM* 16 27 47.258 -24 46 45.83           M7 5 0
94 BKLT J162747-244942 * 16 27 47.4626746961 -24 49 43.626778397           ~ 3 0
95 2MASS J16274825-2442256 BD? 16 27 48.25 -24 42 25.6           ~ 10 0
96 [GY92] 370 TT* 16 27 49.9689327461 -24 44 16.965777286           ~ 9 0
97 [GY92] 374 * 16 27 50.57496 -24 39 48.7296           ~ 3 0
98 BKLT J162750-245112 * 16 27 50.7677861211 -24 51 13.163749193           ~ 3 0
99 [GY92] 377 Y*O 16 27 51.8959543237 -24 46 30.005519039           ~ 14 0
100 BKLT J162800-244819 TT* 16 27 59.9579948843 -24 48 19.320324261   17.3 17.42 15.83 13.44 M4.75 27 0
101 NAME Ophiuchus Molecular Cloud SFR 16 28 06 -24 32.5           ~ 3008 0
102 NAME Oph Cloud Complex DNe 16 30 -24.3           ~ 63 1
103 NAME Oph Cluster ClG 17 12 24.7 -23 21 01           ~ 238 0
104 NAME Gal Center reg 17 45 40.04 -29 00 28.1           ~ 11464 0
105 NAME rho Oph C-S PoC ~ ~           ~ 5 0
106 NAME rho Oph A3 PoC ~ ~           ~ 5 0
107 NAME Carina Region reg ~ ~           ~ 151 0

    Equat.    Gal    SGal    Ecl

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2020.06.04-22:49:49

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