2005ApJ...630..381B


C.D.S. - SIMBAD4 rel 1.7 - 2020.10.19CEST17:29:25

2005ApJ...630..381B - Astrophys. J., 630, 381-399 (2005/September-1)

A mid-infrared imaging survey of embedded young stellar objects in the ρ Ophiuchi cloud core.

BARSONY M., RESSLER M.E. and MARSH K.A.

Abstract (from CDS):

Result. of a comprehensive, new, ground-based mid-infrared imaging survey of the young stellar population of the ρ Ophiuchi cloud are presented. Data were acquired at the Palomar 5 m and at the Keck 10 m telescopes with the MIRLIN and LWS instruments, at 0".5 and 0".25 resolutions, respectively. Of 172 survey objects, 85 were detected. Among the 22 multiple systems observed, 15 were resolved and their individual component fluxes determined. A plot of the frequency distribution of the detected objects with SED spectral slope shows that YSOs spend ∼4x105 yr in the flat-spectrum phase, clearing out their remnant infall envelopes. Mid-infrared variability is found among a significant fraction of the surveyed objects and is found to occur for all SED classes with optically thick disks. Large-amplitude near-infrared variability, also found for all SED classes with optically thick disks, seems to occur with somewhat higher frequency at the earlier evolutionary stages. Although a general trend of mid-infrared excess and near-infrared veiling exists progressing through SED classes, with Class I objects generally exhibiting rK≥1, flat-spectrum objects with rK≥0.58, and Class III objects with rK=0, Class II objects exhibit the widest range of rKvalues, ranging from 0≤rK≤4.5. However, the highly variable value of veiling that a single source can exhibit in any of the SED classes in which active disk accretion can take place is striking and is direct observational evidence for highly time-variable accretion activity in disks. Finally, by comparing mid-infrared versus near-infrared excesses in a subsample with well-determined effective temperatures and extinction values, disk-clearing mechanisms are explored. The results are consistent with disk clearing proceeding from the inside out.

Abstract Copyright:

Journal keyword(s): Infrared: Stars - ISM: Individual: Name: ρ Ophiuchi Cloud - Stars: Planetary Systems: Protoplanetary Disks - Stars: Formation - Stars: Pre-Main-Sequence - Surveys

VizieR on-line data: <Available at CDS (J/ApJ/630/381): table2.dat table3.dat table4.dat table5.dat>

Simbad objects: 178

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Number of rows : 178

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 * mu. UMa SB* 10 22 19.7397659 +41 29 58.269105 6.53 4.64 3.05 1.76 0.80 M0III 292 0
2 * alf Boo RG* 14 15 39.67207 +19 10 56.6730 2.46 1.18 -0.05 -1.03 -1.68 K1.5IIIFe-0.5 2147 0
3 * alf CrB Al* 15 34 41.26800 +26 42 52.8940 2.19 2.22 2.24 2.21 2.25 A1IV 456 0
4 * sig Sco bC* 16 21 11.3157134 -25 35 34.051476 2.32 3.02 2.89 1.69 1.58 O9.5(V)+B7(V) 829 0
5 CD-24 12683 TT* 16 25 19.2425081811 -24 26 52.724827900   11.36 10.55   9.05 G9V 42 0
6 BKLT J162522-243452 Y*? 16 25 22.61208 -24 34 53.4324           ~ 6 0
7 YLW 19 Y*O 16 25 36.7376373343 -24 15 42.528646400   17.8 16.4 14.94 13.36 K3-K5 39 0
8 WLY 2-7 * 16 25 42.4534172311 -24 27 11.053453238           ~ 7 0
9 YLW 21 * 16 25 47.6936754855 -24 18 31.126196857           ~ 11 0
10 YLW 23 * 16 25 49.0571999680 -24 31 39.107365371           ~ 13 0
11 WLY 2-10 TT* 16 25 50.5249510923 -24 39 14.568017391     15.49 13.83 12.30 K5.5 34 0
12 EM* SR 4 Or* 16 25 56.1659484606 -24 20 48.239269835     12.80 11.7 10.7 K0:Ve 152 1
13 GSS 20 TT* 16 25 57.5191102746 -24 30 31.791765578     16.37 14.77 13.05 K5.5 48 0
14 Haro 1-6 Or* 16 26 03.0281201323 -24 23 36.193999164   14.15 14.01 12.38 10.80 K0 204 1
15 BKLT J162607-242725 Y*O 16 26 07.04280 -24 27 24.1848           ~ 20 1
16 CRBR 2307.5-1206 Y*O 16 26 08.79912 -24 18 52.6356           ~ 5 0
17 EM* SR 3 Y*O 16 26 09.3231207767 -24 34 12.176811236   10.9 9.88   9.01 A0 107 0
18 GSS 26 Y*O 16 26 10.33152 -24 20 54.8232           M0 74 1
19 CRBR 2314.4-1237 Y*O 16 26 15.8181138736 -24 19 22.551055479           ~ 21 1
20 GSS 29 TT* 16 26 16.8584457266 -24 22 23.154122364       17.4 15.23 K5-K6 76 1
21 DoAr 24 TT* 16 26 17.0747576971 -24 20 21.594542024   16.06 14.21 14.02 11.57 K7.5V 100 1
22 CRBR 2315.8-1700 Y*O 16 26 17.22936 -24 23 45.3660           ~ 36 0
23 BKLT J162618-242818 * 16 26 17.93688 -24 28 16.3380           ~ 6 0
24 BKLT J162618-241712 TT* 16 26 18.62064 -24 17 10.2912           ~ 4 0
25 Elia 2-20 TT* 16 26 18.8782824640 -24 28 19.698059817           ~ 93 1
26 CRBR 2317.6-1622 TT* 16 26 18.97296 -24 23 07.5048           ~ 7 0
27 CRBR 2317.5-1729 Y*O 16 26 18.98232 -24 24 14.2596           ~ 39 0
28 BKLT J162620-242840 Y*O 16 26 20.83872 -24 28 39.5724           ~ 14 0
29 GSS 30 Y*O 16 26 21.38160 -24 23 04.0524           ~ 200 1
30 [JJK2008] SMM J162622-24225 smm 16 26 21.60 -24 22 54.8           ~ 40 0
31 [CHG85] GSS 30 IRS 3 Y*O 16 26 21.77376 -24 22 51.3948           ~ 56 0
32 CRBR 2320.7-1803 Y*O 16 26 22.21152 -24 24 47.9196           ~ 9 1
33 [RR90] Oph 2320.8-1721 Y*O 16 26 22.26912 -24 24 07.0632           M8 64 0
34 [GY92] 14 Y*? 16 26 22.79952 -24 27 20.0736           ~ 5 0
35 [RR90] Oph 2321.6-1918 * 16 26 23.04696 -24 26 02.3640           ~ 9 0
36 GSS 31 TT* 16 26 23.3694945462 -24 20 59.580653864   15.9 14.70 14.33 11.53 K0e 133 1
37 [GY92] 21 Y*O 16 26 23.57976 -24 24 39.4956           K7 62 2
38 DoAr 25 TT* 16 26 23.6911216715 -24 43 13.886717283       12.65   K5 128 0
39 GSS 32 TT* 16 26 24.0521249616 -24 24 48.105099750       17.81 15.58 K5-K6 95 1
40 Elia 2-24 TT* 16 26 24.0896068058 -24 16 13.456681632   16.3 14.40 15.81 13.97 K6 126 1
41 [GY92] 31 Y*O 16 26 25.23384 -24 23 23.9208           M5.5 25 1
42 [GY92] 29 Y*O 16 26 25.28280 -24 24 45.0072           ~ 23 1
43 [GY92] 38 Y*O 16 26 28.43496 -24 21 51.6312           ~ 7 0
44 ROX 13 Y*O 16 26 29.67048 -24 19 05.5092           ~ 23 1
45 [GY92] 45 * 16 26 29.9872458673 -24 38 42.729704829           ~ 7 0
46 VSSG 27 Y*O 16 26 30.46896 -24 22 57.1440           M 57 1
47 YLW 35 Y*O 16 26 31.03680 -24 31 05.2248           ~ 21 1
48 WLY 2-15 * 16 26 31.62072 -24 31 41.0736           ~ 8 0
49 [GY92] 65 * 16 26 32.9118958548 -24 36 26.285158756           ~ 9 0
50 GSS 35 TT* 16 26 34.1750440278 -24 23 28.331873112     16.53 14.75 12.51 B3 217 1
51 VSSG 4 Y*O 16 26 37.78680 -24 23 00.7476           ~ 27 0
52 [GY92] 91 Y*O 16 26 40.46952 -24 27 14.4720           ~ 60 1
53 GSS 38 TT* 16 26 41.95872 -24 18 00.1404           ~ 8 0
54 WL 8 Y*O 16 26 42.01776 -24 33 26.2332           ~ 21 0
55 WL 7 Y*O 16 26 42.14328 -24 31 02.9460           ~ 31 0
56 [GY92] 101 Y*O 16 26 42.43920 -24 26 25.8972           ~ 27 1
57 [GY92] 103 Y*O 16 26 42.52440 -24 26 31.9056           ~ 10 1
58 GSS 37 TT* 16 26 42.85416 -24 20 29.8608       16.29 14.08 K7-M2 74 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 GSS 39 Y*O 16 26 45.0321556934 -24 23 07.808781522           M0 144 1
62 YLW 37 TT* 16 26 46.4318675036 -24 12 00.041276484   17.15   13.90 12.37 G3.5 51 0
63 BBRCG 6 Y*O 16 26 48.39672 -24 28 34.8852           ~ 10 1
64 WL 2 Y*O 16 26 48.48624 -24 28 38.9064           ~ 51 1
65 [GY92] 130 TT* 16 26 48.74688 -24 26 25.5192           ~ 7 0
66 WL 18 TT* 16 26 48.9801383800 -24 38 25.150629987       19.33 17.38 M3.5 62 0
67 BBRCG 14 Y*O 16 26 53.46936 -24 32 36.2472           ~ 23 1
68 GSS 40 Y*? 16 26 53.86296 -24 22 27.9804           ~ 14 0
69 VSSG 5 Y*O 16 26 54.44376 -24 26 20.7204           ~ 40 1
70 [GY92] 154 Y*O 16 26 54.77088 -24 27 02.2464           M6 22 0
71 [GY92] 156 Y*O 16 26 54.97272 -24 22 29.6904           ~ 22 1
72 GSS 41 TT* 16 26 55.31160 -24 20 27.8124           ~ 13 0
73 BBRCG 16 TT* 16 26 56.91984 -24 28 37.0740           M2.5 16 0
74 WL 21 Y*O 16 26 57.33000 -24 35 38.8032           M6 40 0
75 EM* SR 24B TT* 16 26 58.4363490468 -24 45 32.211217104           M0.5e 78 0
76 EM* SR 24A TT* 16 26 58.5027167089 -24 45 36.698300286       14.15 12.87 K1 91 0
77 WL 14 Y*O 16 26 59.04984 -24 35 56.8788           ~ 50 0
78 WL 22 TT* 16 26 59.16720 -24 34 58.8072           ~ 64 0
79 VSSG 8 TT* 16 27 01.61856 -24 21 37.0404           ~ 16 0
80 WL 16 Y*O 16 27 02.33520 -24 37 27.2316           A0-F3 153 0
81 [GY92] 188 Y*O 16 27 03.00720 -24 26 14.6976           ~ 24 1
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] 200 * 16 27 05.43072 -24 20 33.8280           ~ 5 0
85 YLW 10A TT* 16 27 05.97576 -24 26 18.5172           ~ 21 1
86 BBRCG 21 Y*O 16 27 05.97624 -24 28 36.3252           M7 35 0
87 WL 17 Y*O 16 27 06.77616 -24 38 14.9964           ~ 85 0
88 WL 10 Y*O 16 27 09.1086301538 -24 34 08.290873154           K9 63 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 BBRCG 25 Y*O 16 27 09.72456 -24 29 55.5648           ~ 10 0
92 EM* SR 21A TT* 16 27 10.2776332501 -24 19 12.620553212   16.08 14.10     G1 234 1
93 WL 9 Y*O 16 27 10.34664 -24 33 22.6692           ~ 23 0
94 WLY 1-43 Y*O 16 27 11.17992 -24 40 46.6680           ~ 54 0
95 WLY 2-32 Y*O 16 27 11.68224 -24 23 41.9748           ~ 19 0
96 WL 19 Y*O 16 27 11.71416 -24 38 32.0604           ~ 66 0
97 WL 11 Y*O 16 27 12.13128 -24 34 49.1412           M2 42 0
98 [GY92] 232 Y*? 16 27 13.26240 -24 41 33.7128           ~ 20 0
99 WLY 2-33 Y*O 16 27 14.50512 -24 26 46.0860           ~ 30 0
100 YLW 10B Y*O 16 27 15.45432 -24 26 39.8004           ~ 45 0
101 WLY 2-35 Y*O 16 27 15.51408 -24 30 53.6832           ~ 29 0
102 WL 20 Y*O 16 27 15.69840 -24 38 43.4364           ~ 78 0
103 NAME WL 20E Y*O 16 27 15.87648 -24 38 43.3896           ~ 71 0
104 YLW 10C Y*O 16 27 15.88488 -24 25 14.1924           ~ 25 0
105 YLW 12A Y*O 16 27 17.57160 -24 28 56.2944           ~ 64 0
106 WL 5 TT* 16 27 18.17064 -24 28 52.6800           ~ 88 0
107 [GY92] 248 Y*? 16 27 18.37560 -24 24 26.3124           ~ 12 0
108 BBRCG 39 Y*O 16 27 18.38040 -24 39 14.6844           ~ 36 0
109 VSSG 26 Y*O 16 27 18.48720 -24 29 05.9136           ~ 83 0
110 WL 3 Y*O 16 27 19.21584 -24 28 43.8528           K7 60 0
111 EM* SR 12 Or* 16 27 19.5054789229 -24 41 40.414828505     13.28 12.15 10.855 M0IVe 168 1
112 YLW 13B Y*O 16 27 21.46872 -24 41 43.0692           ~ 86 0
113 [GY92] 255 Y*O 16 27 21.68472 -24 21 49.9608           ~ 9 0
114 WL 6 Y*O 16 27 21.80448 -24 29 53.3616           ~ 111 0
115 [GY92] 253 Y*O 16 27 21.83064 -24 43 35.6952           M3 28 0
116 BBRCG 43 Y*O 16 27 21.97560 -24 29 39.7716           ~ 27 0
117 VSSG 22 Y*O 16 27 22.9143048814 -24 17 57.430600647           ~ 35 1
118 [GY92] 257 Y*O 16 27 24.19872 -24 29 29.4720           ~ 22 0
119 [GY92] 258 TT* 16 27 24.39000 -24 41 47.5620           ~ 23 0
120 CRBR 2422.8-3423 Y*O 16 27 24.61320 -24 41 03.4080           ~ 81 1
121 [GY92] 259 Y*O 16 27 24.63624 -24 29 35.3976           ~ 24 0
122 [GY92] 260 Y*O 16 27 26.28552 -24 42 46.1304           ~ 23 0
123 YLW 16C Y*O 16 27 26.48952 -24 39 23.0760           M1 56 0
124 YLW 15B Y*O 16 27 26.61768 -24 40 45.1524           ~ 29 0
125 [JWM2000] SMM J16274-2440 PoC 16 27 26.70 -24 40 52.3           ~ 21 0
126 YLW 15 Y*O 16 27 26.93640 -24 40 50.8224           ~ 241 1
127 BBRCG 46 Y*O 16 27 27.06864 -24 32 17.5200           ~ 17 0
128 Elia 2-31 TT* 16 27 27.3790999869 -24 31 16.473626072           ~ 64 1
129 YLW 16A Y*O 16 27 28.02744 -24 39 33.5052           K8 185 0
130 BBRCG 44 Y*? 16 27 28.14096 -24 31 43.0932           ~ 9 0
131 Elia 2-32 Y*O 16 27 28.44576 -24 27 21.0348           K6.5 104 1
132 BKLT J162728-241709 Y*? 16 27 28.75104 -24 17 07.0296           ~ 4 0
133 BBRCG 51 Y*? 16 27 29.29416 -24 34 08.5368           ~ 7 0
134 YLW 16B Y*O 16 27 29.43528 -24 39 16.1892           ~ 102 0
135 BBRCG 53 Y*O 16 27 29.96424 -24 33 36.5688           ~ 19 0
136 Elia 2-33 Y*O 16 27 30.18024 -24 27 43.3656           M2 109 1
137 BKLT J162730-242755 * 16 27 30.49 -24 27 55.8           ~ 2 0
138 BBRCG 58 Y*O 16 27 32.13768 -24 29 43.5696           ~ 18 0
139 BBRCG 60 Y*O 16 27 32.67576 -24 33 23.9328           ~ 31 0
140 BBRCG 59 Y*O 16 27 32.71056 -24 32 42.3636           ~ 13 0
141 [GY92] 288 Y*O 16 27 32.72616 -24 45 00.4248           ~ 12 0
142 BBRCG 61 Y*O 16 27 32.85048 -24 32 34.8324           ~ 30 0
143 YLW 18 TT* 16 27 33.1158717225 -24 41 15.261194836       17.66 15.65 K5-K6 63 0
144 [GY92] 303 * 16 27 37.10592 -24 28 45.6996           ~ 5 0
145 IRAS 16245-2423 TT* 16 27 37.1911764648 -24 30 35.031583716       16.66 14.67 B5-F2 237 0
146 [GY92] 301 Y*O 16 27 37.24944 -24 42 38.0160           ~ 32 0
147 [GY92] 309 Y*? 16 27 38.05752 -24 25 27.9372           ~ 6 0
148 WLY 2-50 Y*O 16 27 38.1251499814 -24 30 43.009912599           ~ 30 0
149 YLW 47 TT* 16 27 38.3220493264 -24 36 58.601739078       17.69 15.52 M0 85 0
150 ROX 27 TT* 16 27 39.4297106587 -24 39 15.527875310       15.76 14.03 M0+M4 93 0
151 YLW 45 Y*O 16 27 39.82824 -24 43 15.0672           ~ 107 0
152 EM* SR 9 Or* 16 27 40.2858402419 -24 22 04.132012501   12.91 11.533 11.11 10.00 K5e 250 0
153 [GY92] 323 Y*O 16 27 41.75280 -24 43 36.0984           ~ 19 0
154 WLY 2-53 TT* 16 27 43.78392 -24 43 08.0544           ~ 13 0
155 [GY92] 344 Y*O 16 27 45.78672 -24 44 53.8620           M6 27 0
156 [GY92] 346 Y*O 16 27 45.96504 -24 38 00.5712           ~ 6 0
157 Elia 2-35 * 16 27 46.6886310284 -24 23 22.098059715           K5III 26 0
158 [GY92] 352 Y*O 16 27 47.09496 -24 45 35.0676           ~ 21 0
159 [GY92] 371 Y*O 16 27 49.7891400099 -24 25 21.930904732           M6 28 0
160 Elia 2-36 TT* 16 27 49.8769818907 -24 25 40.237798866       13.69 12.19 A7 65 0
161 NAME IRAS 16248-2841 * 16 27 50.7316456882 -24 48 21.637739741         16.53 ~ 5 0
162 YLW 52 Y*O 16 27 51.80472 -24 31 45.5304           ~ 61 0
163 WLY 2-55 TT* 16 27 52.0863419872 -24 40 50.713643148     16.28 14.48 12.78 K7.5 79 0
164 WLY 1-54 * 16 27 54.4277925804 -24 48 04.082721133           ~ 10 0
165 EM* SR 10 Or* 16 27 55.5811105202 -24 26 18.029286663   15.23 14.19 13.91 11.95 M1.5e 71 0
166 [GY92] 450 Y*O 16 28 03.55560 -24 34 38.6148           M6 14 0
167 [GY92] 461 Y*? 16 28 04.55160 -24 34 48.4536           ~ 8 0
168 [GY92] 463 TT* 16 28 04.64592 -24 34 56.0964           ~ 16 0
169 NAME Ophiuchus Molecular Cloud SFR 16 28 06 -24 32.5           ~ 3063 0
170 BKLT J162836-243552 * 16 28 36.40704 -24 35 52.2564           ~ 2 0
171 BKLT J162841-241618 * 16 28 41.76936 -24 16 16.3416           ~ 2 0
172 BKLT J162904-244057 * 16 29 03.69792 -24 40 58.1376           ~ 2 0
173 WLY 1-64 AB* 16 29 23.3996753815 -24 13 56.891655695           M6 16 0
174 * alf Sco ** 16 29 24.45970 -26 25 55.2094 4.08 2.75 0.91 -0.64 -1.87 M0.5Iab+B3V: 706 0
175 * tet Oph bC* 17 22 00.5793468 -24 59 58.366974 2.18 3.03 3.26 3.38 3.58 OB 315 0
176 * alf Lyr dS* 18 36 56.33635 +38 47 01.2802 0.03 0.03 0.03 0.07 0.10 A0Va 2520 0
177 * gam Aql * 19 46 15.5802908 +10 36 47.740788 5.93 4.23 2.72 1.65 0.87 K3II 419 0
178 * mu. Cep s*r 21 43 30.4610574 +58 46 48.160181 8.85 6.43 4.08 1.98 0.22 M2-Ia 623 1

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2020.10.19-17:29:25

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