2017A&A...600A..20A

Query : 2017A&A...600A..20A

2017A&A...600A..20A - Astronomy and Astrophysics, volume 600A, 20-20 (2017/4-1)

X-shooter spectroscopy of young stellar objects in Lupus. Accretion properties of class II and transitional objects.

ALCALA J.M., MANARA C.F., NATTA A., FRASCA A., TESTI L., NISINI B., STELZER B., WILLIAMS J.P., ANTONIUCCI S., BIAZZO K., COVINO E., ESPOSITO M., GETMAN F. and RIGLIACO E.

Abstract (from CDS):

The mass accretion rate, Macc, is a key quantity for the understanding of the physical processes governing the evolution of accretion discs around young low-mass (M*≤2.0M☉) stars and substellar objects (YSOs). We present here the results of a study of the stellar and accretion properties of the (almost) complete sample of class II and transitional YSOs in the Lupus I, II, III and IV clouds, based on spectroscopic data acquired with the VLT/X-shooter spectrograph. Our study combines the dataset from our previous work with new observations of 55 additional objects. We have investigated 92 YSO candidates in total, 11 of which have been definitely identified with giant stars unrelated to Lupus. The stellar and accretion properties of the 81 bona fide YSOs, which represent more than 90% of the whole class II and transition disc YSO population in the aforementioned Lupus clouds, have been homogeneously and self-consistently derived, allowing for an unbiased study of accretion and its relationship with stellar parameters. The accretion luminosity, Lacc, increases with the stellar luminosity, L*, with an overall slope of ∼1.6, similar but with a smaller scatter than in previous studies. There is a significant lack of strong accretors below L*~=0.1L☉, where Lacc is always lower than 0.01L*. We argue that the Lacc-L* slope is not due to observational biases, but is a true property of the Lupus YSOs. The log Macc-logM* correlation shows a statistically significant evidence of a break, with a steeper relation for M*≤0.2M☉ and a flatter slope for higher masses. The bimodality of the Macc-M* relation is confirmed with four different evolutionary models used to derive the stellar mass. The bimodal behaviour of the observed relationship supports the importance of modelling self-gravity in the early evolution of the more massive discs, but other processes, such as photo-evaporation and planet formation during the YSO's lifetime, may also lead to disc dispersal on different timescales depending on the stellar mass. The sample studied here more than doubles the number of YSOs with homogeneously and simultaneously determined Lacc and luminosity, Lline, of many permitted emission lines. Hence, we also refined the empirical relationships between Lacc and Lline on a more solid statistical basis.

Abstract Copyright: © ESO, 2017

Journal keyword(s): stars: pre-main sequence - stars: low-mass - accretion, accretion disks - open clusters and associations: individual: Lupus - open clusters and associations: individual: Lupus

VizieR on-line data: <Available at CDS (J/A+A/600/A20): table1.dat tablea2.dat tablea3.dat tablee1.dat-tablee9.dat>

CDS comments: RX J0438 not identified (incomplete format)

Simbad objects: 135

goto Full paper

goto View the references in ADS

Number of rows : 135
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024 		#notes
1 V* V1077 Tau Or* 04 34 18.0303957624 +18 30 06.519662280   13.70       G8 82 0
2 NAME Taurus Complex SFR 04 41.0 +25 52           ~ 4415 0
3 LDN 1615 DNe 05 05.5 -03 26           ~ 15 0
4 LDN 1616 DNe 05 07 00 -03 21.1           ~ 34 0
5 NAME Orion Nebula Cluster OpC 05 35.0 -05 29           ~ 2331 0
6 2MASS J05383858-0241558 Y*O 05 38 38.5944218448 -02 41 55.925390112 20.86 21.50 19.80 18.31 16.42 M5.5e 27 0
7 NAME sig Ori Cluster OpC 05 38 42 -02 36.0           ~ 567 0
8 2MASS J05385492-0228583 Y*O 05 38 54.9292657368 -02 28 58.375755156 21.05 20.21 18.61 17.22 15.48 M4.5 31 0
9 LDN 1641 MoC 05 39.0 -07 00           ~ 479 0
10 [W96] 4771-1075 TT* 05 39 05.4085005984 -02 32 30.366192804 17.541 15.79 14.42 13.54 12.70 K7e 37 0
11 Mayrit 425070 Y*O 05 39 11.4017533992 -02 33 32.831052984 21.773 21.52 19.94 18.32 16.43 M5e 28 0
12 NGC 2264 OpC 06 40 52.1 +09 52 37           ~ 1793 0
13 V* BX Ant TT* 10 18 28.6987521312 -31 50 02.830052544   13.39 11.454 11.382 9.325 M0Ve 119 0
14 NAME Cha 1 MoC 11 06 48 -77 18.0           ~ 1154 1
15 CD-29 8887 TT* 11 09 13.7928873024 -30 01 39.968872752   12.95 11.119 10.642 8.875 M2Ve 128 0
16 CD-34 7390A TT* 11 21 17.2193334624 -34 46 45.503251608   12.88 11.46 11.43 9.57 M1Ve 100 0
17 CD-34 7390 ** 11 21 17.24 -34 46 45.5     11.080   9.038 M1Ve+M1Ve 59 0
18 TWA 26 LM* 11 39 51.1378374696 -31 59 21.443660124         15.83 M8e 108 0
19 CD-36 7429B TT* 11 48 23.7348035520 -37 28 48.520414812   15.43 14.00   11.45 M1V 81 0
20 CD-36 7429A TT* 11 48 24.2227406904 -37 28 49.114270524   12.54 11.17 10.92 9.552 K5V 127 0
21 NAME Chamaeleon Region SFR 11 55 -78.0           ~ 806 0
22 V* V1249 Cen TT* 12 15 30.7203201048 -39 48 42.606684144   13.09 11.160 10.919 9.50 M0.5 116 0
23 V* V1250 Cen TT* 12 34 20.4720080040 -48 15 19.545583716   13.3 12.2   11.80 M3 37 0
24 V* V1251 Cen TT* 12 34 20.6481372456 -48 15 13.531352148   13.3 12.2   11.90 M3.5 44 0
25 1RXS J123420.1-481514 ** 12 34 20.65 -48 15 13.6           M3.0 14 0
26 Sz 65 Or* 15 39 27.7716659160 -34 46 17.211087984   13.11 12.13 11.33 10.76 K7 100 0
27 Sz 66 TT* 15 39 28.2828956688 -34 46 18.082914564   14.9   14.51 12.56 M2 59 0
28 V* MU Lup TT* 15 40 41.1704779152 -37 56 18.539934828     12.35     K6 22 0
29 2MASS J15414081-3345188 Y*O 15 41 40.8086577936 -33 45 18.847533888         17.38 M6.5 19 0
30 Lupus 1 Cld 15 43 02.1 -34 09 06           ~ 286 0
31 2MASS J15430624-3920194 TT* 15 43 06.2455060656 -39 20 19.483625508     12.25     K6 17 0
32 2MASS J15445789-3423392 Y*O 15 44 57.8922421008 -34 23 39.355357344   18.38 17.74 17.29 15.28 M5.0e 33 0
33 2MASS J15450887-3417333 Y*O 15 45 08.8742780880 -34 17 33.454839372       18.73   M5.5 45 0
34 CD-33 10685 Or* 15 45 12.8678037432 -34 17 30.644403036 12.47 11.56 10.224 9.60 8.685 K3Ve 272 1
35 V* HW Lup Or* 15 45 17.4118414392 -34 18 28.286447220   17.41 16.25     M1 74 0
36 2MASS J15451851-3421246 Y*O 15 45 18.5160315960 -34 21 24.553939896   17.95   17.35   M6.5 21 0
37 V* GW Lup Or* 15 46 44.7290527536 -34 30 35.677420056   13.8       M1.5e 143 0
38 V* HM Lup Or* 15 47 50.6288371920 -35 28 35.404076028   15.941 14.748 14.337   M3e 83 0
39 THA 15-5 TT* 15 47 56.9427182064 -35 14 34.796420412   14.5 16.2     K7e 85 0
40 V* HN Lup Or* 15 48 05.2154956876 -35 15 53.295162846   16.083 14.377 13.726   M3.5e 61 0
41 V* GQ Lup Or* 15 49 12.1053805848 -35 39 05.058139788 12.19 12.76 11.66 11.15   K7Ve 290 1
42 Sz 76 TT* 15 49 30.7355449512 -35 49 51.413284020   16.611 15.095 14.710   M3.2 52 0
43 Sz 77 TT* 15 51 46.9580885472 -35 56 44.112678504   12.0       K5.5 69 0
44 THA 15-8 TT* 15 53 41.1667402248 -39 00 37.115189856   11.6 11.5     ~ 13 0
45 THA 15-9 TT* 15 53 42.6872122728 -38 08 10.467552660   11.7 11.5     ~ 12 0
46 NAME THA 15-10A Y*O 15 55 50.2814014152 -38 01 33.699111168           M4.5 13 0
47 THA 15-10 TT* 15 55 50.289888 -38 01 33.50928   16.24 14.88 14.74   M5.1 37 0
48 NAME THA 15-10B Y*O 15 55 50.3362340280 -38 01 31.864857996           M5.5 7 0
49 WRAY 15-1384 TT* 15 56 02.0994258408 -36 55 28.274506140 14.91 14.342 13.470 13.311 11.86 M1 45 0
50 THA 15-12 Or* 15 56 09.2066646912 -37 56 06.126118692   13.12 11.93 11.45   M0e 420 0
51 V* RU Lup TT* 15 56 42.3108692112 -37 49 15.473946900 9.27 10.07 9.60     K7/M0e 468 0
52 Lupus 2 MoC 15 57 08 -37 47.1           ~ 114 1
53 Sz 84 TT* 15 58 02.5198436808 -37 36 02.729938536   14.3       M5.0e 72 0
54 WRAY 15-1400 TT* 15 59 16.4717314824 -41 57 10.300018176   13.5 12.0     K7IVe 97 0
55 2MASS J15592523-4235066 Y*O 15 59 25.2340111704 -42 35 06.571838868   17.42 16.82     M5 22 0
56 V* RY Lup Or* 15 59 28.3864710696 -40 21 51.249496176   12.62 9.90     G8/K1IV-V 223 0
57 IRAS 15563-4146 AB* 15 59 45.2700148776 -41 54 57.119355216   18.27 14.41 13.42 11.56 ~ 10 0
58 UCAC3 96-205744 Y*O 16 00 00.6018563304 -42 21 56.821951152   17.29 15.85 15.25 13.43 M4.5 37 0
59 UCAC3 96-205752 Y*O 16 00 02.3583827328 -42 22 14.600258148   16.86 15.46 14.98 13.59 M4 47 0
60 IRAS 15567-4141 LP* 16 00 07.4120207112 -41 49 48.691592652       16.30   ~ 15 1
61 2MASS J16002612-4153553 Y*O 16 00 26.1203153232 -41 53 55.371567156   16.57 16.45 15.70 13.80 M5.25 35 0
62 Sz 130 TT* 16 00 31.0374709944 -41 43 36.988516560   15.82 14.71 13.56 12.46 M1.5 62 0
63 IRAS 15571-4217 LP* 16 00 34.3942102824 -42 25 38.575025004   16.92 17.39 15.56   ~ 9 0
64 V* MY Lup TT* 16 00 44.5202267160 -41 55 30.935126748   12.64 12.17 11.06   K0 111 0
65 Sz 131 Y*O 16 00 49.4333360352 -41 30 03.916812096   17.51 16.13 14.60 12.92 M2 42 0
66 HD 325367 Or* 16 03 05.4915085848 -40 18 25.426727676   11.40 8.50     M0 355 0
67 Lupus 4 MoC 16 03 12.4 -42 07 43           ~ 152 0
68 Sz 133 Y*O 16 03 29.3848659360 -41 40 01.765426548   17.77 16.60 15.78 15.04 K2 48 0
69 V* HO Lup A Y*O 16 07 00.5998021080 -39 02 19.515199452           M0 14 0
70 V* HO Lup B Y*O 16 07 00.6752385384 -39 02 18.260138076           M4.5 13 0
71 2MASS J16070384-3911113 Y*O 16 07 03.84336 -39 11 11.3208       18.79 16.80 M4.5 42 0
72 2MASS J16070854-3914075 LM* 16 07 08.5530917712 -39 14 07.494035352   17.85   18.67 17.86 M1.75 39 0
73 2MASS J16070863-3947219 Y*? 16 07 08.6277721800 -39 47 21.860724696   15.38 14.04 13.50   ~ 7 0
74 THA 15-21 TT* 16 07 10.0694468880 -39 11 03.260683896   15.28 13.70 13.70 12.49 K7-M0 72 0
75 THA 15-20 TT* 16 07 11.5873449384 -39 03 47.492129340   16.25 14.58 14.11 12.92 M0.5 106 0
76 2MASS J16073773-3921388 Y*O 16 07 37.7327699304 -39 21 38.745260928   18.38 17.4 17.12 15.68 M5.5e 39 0
77 Sz 94 TT* 16 07 49.5974149968 -39 04 28.760342844   16.31 16.00 14.76 12.90 ~ 32 0
78 Sz 95 TT* 16 07 52.3109740056 -38 58 06.091698756   16.714 15.189 14.934 12.53 ~ 53 0
79 2MASS J16080017-3902595 Y*O 16 08 00.1718615064 -39 02 59.504573976   16.94 17.01 16.72 14.31 M5.5e 45 0
80 2MASS J16080618-3912225 LP* 16 08 06.1851371808 -39 12 22.547243232       18.00 13.76 ~ 16 1
81 Sz 96 TT* 16 08 12.6308620920 -39 08 33.470354256   14.80 13.43 13.69 11.84 ~ 79 0
82 2MASS J16081497-3857145 Y*O 16 08 14.9753942112 -38 57 14.409165492       18.93 17.42 4.75 42 0
83 SONYC Lup3-5 LM* 16 08 16.0404001440 -39 03 04.320708732   17.74 19.92 18.15 15.28 M7.5 26 0
84 THA 15-24 Y*O 16 08 21.8037909864 -39 04 21.491863824   16.18 14.61 14.67 12.92 M3 58 0
85 V* V1279 Sco Or* 16 08 22.4935277520 -39 04 46.427612052   14.99 13.66 11.70 11.21 M0.4 119 1
86 THA 15-25 Y*O 16 08 24.0422612880 -39 05 49.433170740   15.49 16.00 15.39 14.17 M3.5 49 0
87 THA 15-26 Y*O 16 08 25.7633674272 -39 06 01.247043888   16.62 15.43 14.97 13.12 M5 66 0
88 SSTc2d J160828.1-391310 Y*O 16 08 28.1226362485 -39 13 09.781567277   17.45   17.76 16.13 M6.5 28 0
89 WRAY 16-203 Or* 16 08 29.7275063376 -39 03 11.024360496   16.26 15.91 15.38 15.69 K0: 170 1
90 THA 15-29 Y*O 16 08 30.2687378568 -39 06 11.176056000   14.8 11.14 15.18 13.15 M4 64 0
91 IRAS 16051-3820 Y*O 16 08 30.6994064064 -38 28 26.846324004   11.89 11.15 10.67   K2 69 0
92 THA 15-30 TT* 16 08 30.8142130416 -39 05 48.837746436   15.2 15.25 13.96 13.57 M5 61 0
93 UCAC3 102-194847 Y*O 16 08 35.7826940376 -39 03 47.933557092   16.88 15.49 15.02 13.09 M6 28 0
94 V* V1094 Sco TT* 16 08 36.1772010696 -39 23 02.464980972 16.01 15.00 13.48 12.47 11.45 ~ 78 1
95 THA 15-31 LP? 16 08 36.9025257864 -40 16 20.380514952   15.0 14     M4 22 0
96 2MASS J16083733-3923109 Y*O 16 08 37.3331402112 -39 23 10.926378348   20.1 19.1 20.70 18.44 M7.5e 24 0
97 Sz 106 Y*O 16 08 39.7597402848 -39 06 25.321212288   15.1   15.00 14.66 M2.5 47 0
98 Sz 107 Y*O 16 08 41.7980924472 -39 01 37.038551232   17.31 16.06 15.42 13.20 M5.5 40 0
99 NAME Sz 108B Y*O 16 08 42.8838783888 -39 06 14.692839804       17.71 14.39 M5 37 0
100 IRAS 16054-3857 Y*O 16 08 49.3987083072 -39 05 39.447341844   16.76 17.71 15.89 14.24 M4.5 53 0
101 V* V1192 Sco Or* 16 08 51.4348063536 -39 05 30.460358652     21.9 18.97 18.18 M5 72 0
102 V* V1193 Sco Or* 16 08 51.5693655096 -39 03 17.707587264   15.27 14.58 13.72 12.28 M4.5 70 0
103 UCAC3 102-194910 Y*O 16 08 53.2420957464 -39 14 40.160339952   17.53 16.35 15.35 13.52 M3 49 1
104 2MASS J16085373-3914367 Y*O 16 08 53.7357629040 -39 14 36.799256184       21.73 18.76 M5.5 37 0
105 THA 15-33 TT* 16 08 54.6849382512 -39 37 43.145069664   15.34 13.98 13.29   M1IVe 92 0
106 2MASS J16085529-3848481 Y*O 16 08 55.2899613672 -38 48 48.174613416   17.36   17.24 15.24 M6.5 36 1
107 Sz 112 Y*O 16 08 55.5289090032 -39 02 33.941081832   16.62 15.39 14.78 12.93 M6 67 0
108 THA 15-34 Y*O 16 08 57.8026653048 -39 02 22.853868252   17.46 16.50 16.64 14.65 M6 59 0
109 2MASS J16085953-3856275 Y*O 16 08 59.5395612120 -38 56 27.592929708       19.25 16.91 M8.5e 33 0
110 2MASS J16090141-3925119 Y*O 16 09 01.4148377304 -39 25 11.923332420   16.92 15.31 15.04 13.48 M4 51 0
111 THA 15-35 Or* 16 09 01.8486544824 -39 05 12.414717240   15.33 14.12 14.35 12.54 M5.5 108 0
112 Sz 115 TT* 16 09 06.2137580736 -39 08 51.873869400   16.88 15.48 15.09 13.12 ~ 50 0
113 2MASS J16092697-3836269 Y*O 16 09 26.9795990952 -38 36 26.933727420   17.55   16.31 14.74 M4.5 32 0
114 Lupus 3 SFR 16 09.6 -39 03           ~ 323 0
115 THA 15-37 Y*O 16 09 44.3607357216 -39 13 30.167581764   15.84 14.59 14.20 12.38 M2 60 0
116 Sz 118 Y*O 16 09 48.6562295568 -39 11 16.847425032   18.32 16.90 16.61 15.00 K6 65 0
117 2MASS J16095628-3859518 Y*O 16 09 56.2954845696 -38 59 51.581549796   17.37 18.0 16.49 15.28 M6.0e 46 0
118 SONYC Lup3-29 Y*O 16 10 01.3326378528 -39 06 44.815987296   18.38 17.42 17.90 15.27 M7.5 27 0
119 2MASS J16101857-3836125 Y*O 16 10 18.5677223424 -38 36 12.598346628   18.37 16.63 16.67 14.70 M5 30 0
120 2MASS J16101984-3836065 Y*O 16 10 19.8333629688 -38 36 06.586243272   17.39   16.76 15.57 M6.5 35 0
121 2MASS J16102955-3922144 Y*O 16 10 29.5517478000 -39 22 14.451017844   17.51 16.31 15.79 13.90 M4.5 52 0
122 2MASS J16104536-3854547 RG* 16 10 45.3653978616 -38 54 54.728034696   17.51   17.13 16.05 <M1 17 0
123 NAME THA 15-42B Y*O 16 10 51.4487859072 -38 53 12.993835812           M2 9 0
124 THA 15-42 Y*O 16 10 51.5849835192 -38 53 13.767885384   15.89 14.48 14.44 12.95 M1e 73 0
125 2MASS J16114865-3817580 Y*O 16 11 48.6524006736 -38 17 58.088822352   17.04 15.64 15.72 14.99 ~ 12 0
126 2MASS J16115979-3823383 TT* 16 11 59.7947194344 -38 23 38.374012212   18.17 16.55 16.24 14.26 M5.0e 48 0
127 NAME Upper Sco Association As* 16 12 -23.4           ~ 1369 1
128 2MASS J16121120-3832197 Y*O 16 12 11.2108041432 -38 32 19.758929100   18.03   17.25 14.76 ~ 21 0
129 2MASS J16122269-3713276 LP* 16 12 22.7052583440 -37 13 27.640524972   17.63 15.63 15.76   ~ 9 0
130 UCAC3 104-204438 Y*O 16 12 43.7499349656 -38 15 03.075603264   15.00 13.44 13.39 11.61 M1 44 0
131 2MASS J16134410-3736462 Y*O 16 13 44.1007544088 -37 36 46.261518840   17.97   16.37 14.66 M5 26 0
132 Lupus 5 MoC 16 21 -37.5           ~ 63 0
133 Lupus 6 Cld 16 25 -40.3           ~ 51 1
134 NAME Ophiuchus Molecular Cloud SFR 16 28 06 -24 32.5           ~ 3629 1
135 IC 1396 OpC 21 38 58.8 +57 30 50           ~ 496 1

To bookmark this query, right click on this link: simbad:objects in 2017A&A...600A..20A and select 'bookmark this link' or equivalent in the popup menu