2015ApJ...815....2W


C.D.S. - SIMBAD4 rel 1.7 - 2020.02.17CET20:17:08

2015ApJ...815....2W - Astrophys. J., 815, 2 (2015/December-2)

Relative proper motions in the rho Ophiuchi cluster.

WILKING B.A., VRBA F.J. and SULLIVAN T.

Abstract (from CDS):

Near-infrared images optimized for astrometry have been obtained for four fields in the high-density L 1688 cloud core over a 12 year period. The targeted regions include deeply embedded young stellar objects (YSOs) and very low luminosity objects too faint and/or heavily veiled for spectroscopy. Relative proper motions in R.A. and decl. were computed for 111 sources and again for a subset of 65 YSOs, resulting in a mean proper motion of (0,0) for each field. Assuming each field has the same mean proper motion, YSOs in the four fields were combined to yield estimates of the velocity dispersions in R.A. and decl. that are consistent with 1.0 km/s. These values appear to be independent of the evolutionary state of the YSOs. The observed velocity dispersions are consistent with the dispersion in radial velocity derived for optically visible YSOs at the periphery of the cloud core and are consistent with virial equilibrium. The higher velocity dispersion of the YSOs in the plane of the sky relative to that of dense cores may be a consequence of stellar encounters due to dense cores and filaments fragmenting to form small groups of stars or the global collapse of the L 1688 cloud core. An analysis of the differential magnitudes of objects over the 12 year baseline has not only confirmed the near-infrared variability for 29 YSOs established by prior studies, but has also identified 18 new variability candidates. Four of these have not been previously identified as YSOs and may be newly identified cluster members.

Abstract Copyright:

Journal keyword(s): ISM: individual: Rho Ophiuchi cloud - stars: formation - stars: pre-main sequence

Simbad objects: 87

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Number of rows : 87

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 1333 SFR 03 28 55 +31 22.2   10.9       ~ 1200 1
2 NGC 2264 OpC 06 40 58 +09 53.7     3.9     ~ 1564 1
3 NAME Upper Sco Association As* 16 12 -23.4           ~ 975 1
4 NAME ASSOC II SCO As* 16 15 -24.2           ~ 1091 1
5 [SKS95] 162254.3-241531 * 16 25 55.57416 -24 22 17.3388           ~ 3 0
6 EM* SR 4 TT* 16 25 56.1659484606 -24 20 48.239269835     12.80 11.7 10.7 K0:Ve 145 1
7 [SKS95] 162255.5-241646 * 16 25 56.74344 -24 23 32.2800           ~ 4 0
8 [SKS95] 162256.4-241632 Y*O 16 25 57.69816 -24 23 18.2292           ~ 6 0
9 [C81] 8 TT* 16 25 59.6610538664 -24 21 22.381551315       15.03 13.00 M5.5 23 0
10 [BHM2012b] 134 * 16 26 01.68576 -24 23 28.8600           ~ 2 0
11 Haro 1-6 TT* 16 26 03.0281201323 -24 23 36.193999164   14.15 14.01 12.38 10.80 K0 200 1
12 CRBR 2304.5-1657 * 16 26 06.08784 -24 23 43.2096           ~ 5 0
13 GSS 26 Y*O 16 26 10.33152 -24 20 54.8232           M0 73 1
14 CRBR 2314.4-1237 Y*O 16 26 15.8181138736 -24 19 22.551055479           ~ 20 1
15 GSS 29 TT* 16 26 16.8584457266 -24 22 23.154122364       17.4 15.23 K5-K6 75 1
16 DoAr 24 TT* 16 26 17.0747576971 -24 20 21.594542024   16.06 14.21 14.02 11.57 K7.5V 98 1
17 CRBR 2315.8-1700 Y*O 16 26 17.22936 -24 23 45.3660           ~ 35 0
18 CRBR 2317.5-1729 Y*O 16 26 18.98232 -24 24 14.2596           ~ 38 0
19 NAME rho Oph Cluster Cl* 16 26 22 -24 23.7           ~ 46 0
20 NAME rho Oph A Cloud MoC 16 26 26.4 -24 22 33           ~ 237 1
21 WL 21 TT* 16 26 57.33000 -24 35 38.8032           ~ 40 0
22 CRBR 2356.6-3058 Y*O 16 26 58.27872 -24 37 40.9584           ~ 21 0
23 WL 14 Y*O 16 26 59.04984 -24 35 56.8788           ~ 49 0
24 WL 16 Y*O 16 27 02.33520 -24 37 27.2316           A0-F3 152 0
25 [GY92] 197 Y*O 16 27 05.24616 -24 36 29.7936           ~ 56 1
26 [GY92] 201 Y*O 16 27 06.0449677585 -24 38 12.323069411           ~ 9 0
27 WL 17 Y*O 16 27 06.77616 -24 38 14.9964           ~ 81 0
28 WL 10 Y*O 16 27 09.1086301538 -24 34 08.290873154           K9 62 0
29 Elia 2-29 Y*O 16 27 09.43032 -24 37 18.7716           ~ 263 1
30 WL 19 Y*O 16 27 11.71416 -24 38 32.0604           ~ 66 0
31 WL 11 Y*O 16 27 12.13128 -24 34 49.1412           M2 41 0
32 WLY 2-33 Y*O 16 27 14.50512 -24 26 46.0860           ~ 30 0
33 YLW 10B Y*O 16 27 15.45432 -24 26 39.8004           ~ 45 0
34 WLY 2-35 Y*O 16 27 15.51408 -24 30 53.6832           ~ 29 0
35 2MASS J16271643-2431145 Y*O 16 27 16.438 -24 31 14.55           ~ 13 0
36 2MASS J16271720-2435130 Y*? 16 27 17.20 -24 35 13.0           ~ 3 0
37 YLW 12A Y*O 16 27 17.57160 -24 28 56.2944           ~ 64 0
38 WL 5 TT* 16 27 18.17064 -24 28 52.6800           ~ 88 0
39 BBRCG 39 Y*O 16 27 18.38040 -24 39 14.6844           ~ 36 0
40 VSSG 26 Y*O 16 27 18.48720 -24 29 05.9136           ~ 82 0
41 WL 3 Y*O 16 27 19.21584 -24 28 43.8528           K7 60 0
42 EM* SR 12 TT* 16 27 19.5054789229 -24 41 40.414828505     13.28 12.15 10.855 M0IVe 162 1
43 YLW 13B Y*O 16 27 21.46872 -24 41 43.0692           ~ 85 0
44 WL 6 Y*O 16 27 21.80448 -24 29 53.3616           ~ 111 0
45 [GY92] 253 Y*O 16 27 21.83064 -24 43 35.6952           M3 28 0
46 BKLT J162721-242728 Y*O 16 27 21.83424 -24 27 27.5868           ~ 16 0
47 BBRCG 43 Y*O 16 27 21.97560 -24 29 39.7716           ~ 27 0
48 [GY92] 257 Y*O 16 27 24.19872 -24 29 29.4720           ~ 22 0
49 [GY92] 258 TT* 16 27 24.39000 -24 41 47.5620           ~ 23 0
50 CRBR 2422.8-3423 Y*O 16 27 24.61320 -24 41 03.4080           ~ 79 1
51 [GY92] 259 Y*O 16 27 24.63624 -24 29 35.3976           ~ 24 0
52 [GY92] 260 Y*O 16 27 26.28552 -24 42 46.1304           ~ 23 0
53 YLW 16C Y*O 16 27 26.48952 -24 39 23.0760           M1 54 0
54 [GY92] 264 TT* 16 27 26.5817762470 -24 25 54.393628119       17.90 15.72 M8 36 0
55 YLW 15B Y*O 16 27 26.61768 -24 40 45.1524           ~ 28 0
56 YLW 15 Y*O 16 27 26.93640 -24 40 50.8224           ~ 235 1
57 Elia 2-31 TT* 16 27 27.3790999869 -24 31 16.473626072           ~ 63 1
58 YLW 16A Y*O 16 27 28.02744 -24 39 33.5052           K8 182 0
59 BBRCG 44 Y*? 16 27 28.14096 -24 31 43.0932           ~ 9 0
60 Elia 2-32 Y*O 16 27 28.44576 -24 27 21.0348           K6.5 103 1
61 YLW 16B Y*O 16 27 29.43528 -24 39 16.1892           ~ 100 0
62 Elia 2-33 Y*O 16 27 30.18024 -24 27 43.3656           M2 106 1
63 ISO-Oph 150 TT* 16 27 30.91152 -24 27 33.1956           ~ 14 0
64 BBRCG 58 Y*O 16 27 32.13768 -24 29 43.5696           ~ 18 0
65 2MASS J16273288-2428116 BD* 16 27 32.883 -24 28 11.68           ~ 6 0
66 YLW 18 TT* 16 27 33.1158717225 -24 41 15.261194836       17.66 15.65 K5-K6 62 0
67 [GY92] 295 TT* 16 27 35.2624006505 -24 38 33.439591125       16.16 14.08 M4.5 32 0
68 [GY92] 297 Y*O 16 27 36.5263098744 -24 28 33.333096307       14.67 13.30 M2 12 0
69 [GY92] 298 * 16 27 36.80976 -24 39 39.2112           ~ 5 0
70 [GY92] 303 * 16 27 37.10592 -24 28 45.6996           ~ 5 0
71 IRAS 16245-2423 TT* 16 27 37.1911764648 -24 30 35.031583716       16.66 14.67 B5-F2 228 0
72 [GY92] 301 Y*O 16 27 37.24944 -24 42 38.0160           ~ 31 0
73 WLY 2-50 Y*O 16 27 38.1251499814 -24 30 43.009912599           ~ 29 0
74 [GY92] 310 Y*O 16 27 38.6280925403 -24 38 39.230714152         17.40 M8 59 0
75 [GY92] 313 * 16 27 38.93832 -24 30 24.5556           ~ 4 0
76 [GY92] 312 Y*O 16 27 38.94456 -24 40 20.6724           M2.5 38 0
77 ROX 27 TT* 16 27 39.4297106587 -24 39 15.527875310       15.76 14.03 M0+M4 87 0
78 2MASS J16273955-2443317 IR 16 27 39.551 -24 43 31.71           ~ 2 0
79 YLW 45 Y*O 16 27 39.82824 -24 43 15.0672           ~ 104 0
80 [GY92] 317 * 16 27 40.09536 -24 38 36.4596           ~ 5 0
81 [SKS95] 162438.7-241957 Y*O 16 27 40.10304 -24 26 36.5316           ~ 10 0
82 2MASS J16274160-2438382 Y*O 16 27 41.603 -24 38 38.30           ~ 4 0
83 [GY92] 323 Y*O 16 27 41.75280 -24 43 36.0984           ~ 19 0
84 2MASS J16274178-2442346 Y*O 16 27 41.788 -24 42 34.60           ~ 8 0
85 [GY92] 326 TT* 16 27 42.7019471651 -24 38 50.620859523         17.30 M2 37 0
86 WLY 2-53 TT* 16 27 43.78392 -24 43 08.0544           ~ 13 0
87 NAME Ophiuchus Molecular Cloud SFR 16 28 06 -24 32.5           ~ 2971 0

    Equat.    Gal    SGal    Ecl

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2020.02.17-20:17:08

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