2006A&A...452..245N


Query : 2006A&A...452..245N

2006A&A...452..245N - Astronomy and Astrophysics, volume 452, 245-252 (2006/6-2)

Accretion in the ρ-Ophiuchi pre-main sequence stars.

NATTA A., TESTI L. and RANDICH S.

Abstract (from CDS):

The aim of this paper is to provide a measurement of the mass accretion rate in a large, complete sample of objects in the core of the star forming region ρ Oph. The sample includes most of the objects (104 out of 111) with evidence of a circumstellar disk from mid-infrared photometry; it covers a stellar mass range from about 0.03 to 3M and it is complete to a limiting mass of ∼0.05M. We used J and K-band spectra to derive the mass accretion rate of each object from the intensity of the hydrogen recombination lines, Paβ or Brγ. For comparison, we also obtained similar spectra of 35 diskless objects. The results show that emission in these lines is only seen in stars with disks, and can be used as an indicator of accretion. However, the converse does not hold, as about 50% of our disk objects do not have detectable line emission. The measured accretion rates show a strong correlation with the mass of the central object ({dot}(M)acc∝M*1.8±0.2) and a large spread, of two orders of magnitude at least, for any interval of M*. A comparison with existing data for Taurus shows that the objects in the two regions have similar behaviour, at least for objects more massive than ∼0.1M. The implications of these results are briefly discussed.

Abstract Copyright:

Journal keyword(s): stars: formation - accretion, accretion disks - stars: activity

VizieR on-line data: <Available at CDS (J/A+A/452/245): tablec1.dat tablec2.dat tablec3.dat>

Nomenclature: Tables C1, C2, C3: ISO-Oph NNNa N=11 added.

Simbad objects: 144

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Number of rows : 144
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 NAME Taurus Complex SFR 04 41.0 +25 52           ~ 3972 0
2 M 42 HII 05 35 17.3 -05 23 28           ~ 3918 0
3 NAME Ori A MoC 05 38 -07.1           ~ 2860 0
4 NAME Chamaeleon Region SFR 11 55 -78.0           ~ 747 0
5 YLW 19 Y*O 16 25 36.7381317840 -24 15 42.526380780   17.8 16.4 14.94 13.36 K3-K5 43 0
6 BKLT J162538-242238 Y*O 16 25 38.1274773528 -24 22 36.185318004           M0 29 0
7 IRAS 16226-2420 TT* 16 25 39.5828608249 -24 26 34.889477995       16.78 14.84 M2 39 0
8 WLY 2-10 TT* 16 25 50.5247210760 -24 39 14.565244608     15.49 13.83 12.30 K5.5 35 0
9 EM* SR 4 Or* 16 25 56.1659023848 -24 20 48.240627072     12.80 11.7 10.7 K0:Ve 169 1
10 [SKS95] 162300.0-241834 Y*O 16 26 01.3781005104 -24 25 20.496413424           ~ 22 0
11 VSSG 19 TT* 16 26 03.2977778400 -24 17 46.536135468     16.49 14.86 13.00 M2 32 0
12 BKLT J162604-241753 Y*O 16 26 04.57776 -24 17 51.4824           ~ 16 0
13 BKLT J162607-242725 Y*O 16 26 07.04280 -24 27 24.1848           ~ 21 1
14 BKLT J162607-242742 Y*O 16 26 07.63968 -24 27 41.3676           ~ 18 1
15 EM* SR 3 Y*O 16 26 09.3229222944 -24 34 12.172009728   10.9 9.88   9.01 A0 112 0
16 GSS 26 Y*O 16 26 10.33152 -24 20 54.8232           M0 78 1
17 CRBR 2314.4-1237 Y*O 16 26 15.8177264160 -24 19 22.561232916           ~ 22 1
18 GSS 29 TT* 16 26 16.8561896376 -24 22 23.150221356       17.4 15.23 K5-K6 79 1
19 DoAr 24 TT* 16 26 17.0743951968 -24 20 21.594730920   16.06 14.21 14.02 11.57 K7.5V 103 1
20 CRBR 2317.3-1925 Y*O 16 26 18.82056 -24 26 10.5216           M7 43 0
21 Elia 2-20 TT* 16 26 18.8775818016 -24 28 19.695035064           ~ 106 1
22 CRBR 2317.5-1729 Y*O 16 26 18.98232 -24 24 14.2596           ~ 42 0
23 BKLT J162621-241544 TT* 16 26 21.0273010224 -24 15 41.471673624           ~ 9 0
24 [GY92] 5 Y*O 16 26 21.5381846568 -24 26 00.994958844       18.30 15.80 M7 64 1
25 [GY92] 3 Y*O 16 26 21.9078410496 -24 44 39.697627344       17.95 15.62 M6.5 50 0
26 [RR90] Oph 2320.8-1721 Y*O 16 26 22.26912 -24 24 07.0632           M8 68 0
27 [GY92] 15 Y*O 16 26 22.95576 -24 28 46.1496           M6 23 0
28 GSS 31 TT* 16 26 23.3684537424 -24 20 59.579380248   15.9 14.70 14.33 11.53 K0e 138 1
29 [GY92] 21 Y*O 16 26 23.57976 -24 24 39.4956           K7 66 2
30 DoAr 25 TT* 16 26 23.6911292736 -24 43 13.888543800       12.65   K5 148 0
31 GSS 32 TT* 16 26 24.0509462472 -24 24 48.095495928       17.81 15.58 K5-K6 99 1
32 Elia 2-24 TT* 16 26 24.0886188024 -24 16 13.448569260   16.3 14.40 15.81 13.97 K6 143 1
33 [GY92] 29 Y*O 16 26 25.28280 -24 24 45.0072           ~ 24 1
34 [GY92] 33 Y*O 16 26 27.5391054120 -24 41 53.887865712           ~ 24 0
35 BKLT J162628-241543 Y*O 16 26 28.47672 -24 15 41.1660           ~ 10 1
36 VSSG 27 Y*O 16 26 30.46896 -24 22 57.1440           M 61 1
37 YLW 35 Y*O 16 26 31.03680 -24 31 05.2248           ~ 21 1
38 BKLT J162636-241554 Y*O 16 26 36.8350696008 -24 15 51.854365512       17.37 15.67 K7-M1 37 1
39 VSSG 4 Y*O 16 26 37.78680 -24 23 00.7476           ~ 30 0
40 [GY92] 84 Y*O 16 26 38.80368 -24 23 22.7328           M6 21 0
41 [GY92] 93 TT* 16 26 41.2666088952 -24 40 17.881012092       15.41 13.37 M5 55 0
42 WL 7 Y*O 16 26 42.14328 -24 31 02.9460           ~ 33 0
43 GSS 37 TT* 16 26 42.85416 -24 20 29.8608       16.29 14.08 K7-M2 77 1
44 [GY92] 109 Y*O 16 26 42.89280 -24 22 59.0808           M6 19 0
45 VSSG 11 TT* 16 26 43.7641950672 -24 16 33.272135940           ~ 46 1
46 [GY92] 112 TT* 16 26 44.3020015896 -24 43 14.061995292     17.07 15.15 13.37 M3 33 0
47 GSS 39 Y*O 16 26 45.0318401664 -24 23 07.793180124           M0 171 1
48 YLW 37 TT* 16 26 46.4288834880 -24 12 00.078675192   17.15   13.90 12.37 G3.5 56 0
49 [GY92] 122 Y*O 16 26 47.0562943152 -24 44 29.784385248       17.41 15.19 M4.5 19 0
50 WL 2 Y*O 16 26 48.48624 -24 28 38.9064           ~ 58 1
51 WL 18 TT* 16 26 48.9809680488 -24 38 25.152593208       19.33 17.38 M3.5 65 0
52 VSSG 3 Y*O 16 26 49.2314977008 -24 20 03.429427200           ~ 45 1
53 YLW 1A TT* 16 26 51.1102330584 -24 20 50.761137588           ~ 9 0
54 BBRCG 13 Y*O 16 26 51.97104 -24 30 39.4956           ~ 25 1
55 BBRCG 14 Y*O 16 26 53.46936 -24 32 36.2472           ~ 25 1
56 VSSG 5 Y*O 16 26 54.44376 -24 26 20.7204           ~ 42 1
57 [GY92] 154 Y*O 16 26 54.77088 -24 27 02.2464           M6 24 0
58 BKLT J162656-241353 TT* 16 26 56.7836190744 -24 13 51.537326592       18.46 16.29 K7 27 0
59 BBRCG 16 TT* 16 26 56.91984 -24 28 37.0740           M2.5 16 0
60 WL 21 Y*O 16 26 57.33000 -24 35 38.8032           M6 41 0
61 CRBR 2356.6-3058 Y*O 16 26 58.27872 -24 37 40.9584           ~ 23 0
62 YLW 1C Or* 16 26 58.39608 -24 21 29.9808           M6 33 0
63 EM* SR 24B TT* 16 26 58.4361499704 -24 45 32.224542876           M0.5e 81 0
64 EM* SR 24A TT* 16 26 58.5134422944 -24 45 36.722580480       14.15 12.87 K1 97 0
65 Haro 1-7 ** 16 26 58.53 -24 45 35.3           K2:e+M0.5e 99 0
66 BKLT J162658-241836 Or* 16 26 58.63896 -24 18 34.6644           M4.5 23 1
67 WL 14 Or* 16 26 59.04984 -24 35 56.8788           ~ 51 0
68 VSSG 8 TT* 16 27 01.61856 -24 21 37.0404           ~ 16 0
69 WL 16 Y*O 16 27 02.33520 -24 37 27.2316           A0-F3 155 0
70 [GY92] 188 Y*O 16 27 03.00720 -24 26 14.6976           ~ 27 1
71 BKLT J162703-242007 Y*O 16 27 03.59088 -24 20 05.4456           M1.5 19 0
72 VSSG 31 Or* 16 27 04.10688 -24 28 29.9136           ~ 59 1
73 [GY92] 195 Or* 16 27 04.57464 -24 27 15.6636           ~ 31 1
74 [GY92] 204 TT* 16 27 06.5924837856 -24 41 48.871282992       17.57 15.43 M5 87 0
75 WL 17 Y*O 16 27 06.77616 -24 38 14.9964           ~ 94 0
76 BKLT J162708-241204 TT* 16 27 09.0794157000 -24 12 00.814867308       18.47 16.14 M2.5 26 0
77 WL 10 Or* 16 27 09.1062090672 -24 34 08.278196304           K9 66 0
78 [GY92] 213 Y*O 16 27 09.35328 -24 40 22.4292           ~ 30 0
79 Elia 2-29 Y*O 16 27 09.43032 -24 37 18.7716           ~ 276 1
80 EM* SR 21A TT* 16 27 10.2778380120 -24 19 12.622467720   16.08 14.10     G1 256 1
81 WLY 1-43 Y*O 16 27 11.17992 -24 40 46.6680           ~ 57 0
82 WLY 2-32 Y*O 16 27 11.68224 -24 23 41.9748           ~ 19 0
83 WL 19 Y*O 16 27 11.71416 -24 38 32.0604           ~ 68 0
84 WL 11 Or* 16 27 12.13128 -24 34 49.1412           M2 43 0
85 VSSG 24 Y*O 16 27 13.7329154424 -24 18 16.861890420           ~ 34 1
86 [GY92] 235 Y*O 16 27 13.8206486496 -24 43 31.647995436           M3.5 39 0
87 WLY 2-33 Y*O 16 27 14.50512 -24 26 46.0860           ~ 32 0
88 YLW 10B Y*O 16 27 15.45432 -24 26 39.8004           ~ 49 0
89 WL 20 Y*O 16 27 15.69840 -24 38 43.4364           ~ 78 0
90 NAME WL 20E Y*O 16 27 15.8951829912 -24 38 43.788560604           ~ 71 0
91 YLW 12A Y*O 16 27 17.57160 -24 28 56.2944           ~ 66 0
92 ISO-Oph 123 TT* 16 27 17.5857757152 -24 05 13.700934204   20.3 18.9 17.67 15.47 M3.5 13 0
93 VSSG 26 Or* 16 27 18.48720 -24 29 05.9136           ~ 86 0
94 WL 3 Y*O 16 27 19.21584 -24 28 43.8528           K7 62 0
95 YLW 13B Y*O 16 27 21.46872 -24 41 43.0692           ~ 90 0
96 VSSG 22 Or* 16 27 22.9174580712 -24 17 57.414656688           ~ 36 1
97 BKLT J162726-241925 Y*O 16 27 26.22336 -24 19 22.9980           M7.75 27 0
98 [GY92] 260 Y*O 16 27 26.28552 -24 42 46.1304           ~ 25 0
99 YLW 16C Or* 16 27 26.48952 -24 39 23.0760           M1 56 0
100 Elia 2-31 TT* 16 27 27.3786513768 -24 31 16.442242464           ~ 67 1
101 Elia 2-32 Y*O 16 27 28.44576 -24 27 21.0348           K6.5 109 1
102 Elia 2-33 Y*O 16 27 30.18024 -24 27 43.3656           M2 114 1
103 [GY92] 284 TT* 16 27 30.8467391952 -24 24 56.094396228       18.45 16.24 M3.25 42 0
104 BBRCG 56 Y*O 16 27 31.0593237432 -24 34 03.262655028           ~ 19 0
105 BBRCG 60 Y*O 16 27 32.67576 -24 33 23.9328           ~ 33 0
106 BBRCG 61 Y*O 16 27 32.85048 -24 32 34.8324           ~ 31 0
107 YLW 18 TT* 16 27 33.1157754648 -24 41 15.259932924       17.66 15.65 K5-K6 68 0
108 [GY92] 295 TT* 16 27 35.2627683216 -24 38 33.428056416       16.16 14.08 M4.5 34 0
109 [GY92] 296 Y*O 16 27 35.6609124408 -24 45 32.525715996           ~ 13 0
110 [GY92] 297 Y*O 16 27 36.5262764280 -24 28 33.332095092       14.67 13.30 M2 12 0
111 [GY92] 301 Y*O 16 27 37.24944 -24 42 38.0160           ~ 35 0
112 BKLT J162737-241756 Y*O 16 27 37.4277519528 -24 17 54.924640440           M7.5 27 0
113 YLW 47 TT* 16 27 38.3206405584 -24 36 58.594880844       17.69 15.52 M0 89 0
114 [GY92] 310 Y*O 16 27 38.6295993720 -24 38 39.214842072         17.40 M8 63 0
115 [GY92] 312 Y*O 16 27 38.94456 -24 40 20.6724           M2.5 41 0
116 ROX 27 TT* 16 27 39.4295731464 -24 39 15.527230272       15.76 14.03 M0+M4 102 0
117 EM* SR 9 Or* 16 27 40.2857881416 -24 22 04.130226300   12.91 11.533 11.11 10.00 K5e 269 0
118 [GY92] 322 Y*O 16 27 41.49432 -24 35 37.6656           ~ 18 0
119 BKLT J162741-244645 Y*O 16 27 41.61024 -24 46 44.7420           ~ 19 0
120 2MASS J16274164-2435411 Y*? 16 27 41.64240 -24 35 41.1324           ~ 5 0
121 [GY92] 323 Y*O 16 27 41.75280 -24 43 36.0984           ~ 21 0
122 [GY92] 326 TT* 16 27 42.7019158944 -24 38 50.619050052         17.30 M2 39 0
123 [GY92] 344 Y*O 16 27 45.78672 -24 44 53.8620           M6 29 0
124 [GY92] 350 Y*O 16 27 46.2923939352 -24 31 41.243157372           M7.5 38 0
125 [GY92] 352 Y*O 16 27 47.09496 -24 45 35.0676           ~ 22 0
126 [GY92] 371 Y*O 16 27 49.7891400099 -24 25 21.930904732           M6 31 0
127 Elia 2-36 TT* 16 27 49.8764029464 -24 25 40.232849484       13.69 12.19 A7 67 0
128 [GY92] 370 TT* 16 27 49.9683571632 -24 44 16.983329568           ~ 9 0
129 [GY92] 373 Y*O 16 27 50.5084164432 -24 39 03.048694488           ~ 7 0
130 [GY92] 377 Y*O 16 27 51.8954041800 -24 46 30.021158712           ~ 14 0
131 [GY92] 397 Y*O 16 27 55.25496 -24 28 39.5580           M6 27 0
132 EM* SR 10 Or* 16 27 55.5811084704 -24 26 18.029534748   15.23 14.19 13.91 11.95 M1.5e 74 0
133 [GY92] 398 Y*O 16 27 55.65360 -24 44 50.9028           ~ 9 0
134 [GY92] 412 TT* 16 27 57.87480 -24 36 02.2140           ~ 7 0
135 [GY92] 450 Y*O 16 28 03.55560 -24 34 38.6148           M6 14 0
136 [GY92] 472 TT* 16 28 05.77704 -24 33 54.9900           ~ 8 0
137 NAME Ophiuchus Molecular Cloud SFR 16 28 06 -24 32.5           ~ 3373 1
138 BKLT J162812-241138 Y*O 16 28 12.7235398560 -24 11 35.716712676           M6 29 0
139 BKLT J162813-243249 Y*O 16 28 13.7954116248 -24 32 49.476119064       18.08 15.72 M3-M4.5 20 0
140 YLW 58 TT* 16 28 16.5129208176 -24 36 58.054939128   18.5   16.55 14.46 M4 91 0
141 ISO-Oph 195 TT* 16 28 16.7370297600 -24 05 14.436020040       15.59 13.91 K5-K6 34 0
142 BKLT J162821-244246 Y*O 16 28 21.70584 -24 42 47.1276           ~ 12 0
143 EM* SR 20 Or* 16 28 32.6876536896 -24 22 45.008526648   16.23   12.59   G7 79 0
144 EM* SR 13 Or* 16 28 45.2768168328 -24 28 18.905579112     13.60 12.40 10.9 M2e 127 0

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2022.08.09-03:37:38

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