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


C.D.S. - SIMBAD4 rel 1.7 - 2020.10.21CEST15:28:10

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

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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 - 2020
#notes
1 V* V1077 Tau Or* 04 34 18.0134345949 +18 30 06.335688396   13.70       G8 74 0
2 NAME Taurus Complex SFR 04 41.0 +25 52           ~ 3542 0
3 LDN 1615 DNe 05 05.5 -03 26           ~ 13 0
4 LDN 1616 DNe 05 07 00 -03 21.1           ~ 27 0
5 NAME Orion Nebula Cluster OpC 05 35.0 -05 29           ~ 2013 1
6 2MASS J05383858-0241558 Y*O 05 38 38.5945611243 -02 41 55.919882016 20.86 21.50 19.80 18.31 16.42 M5.5e 24 0
7 NAME sigma Orionis Cluster MGr 05 38 42 -02 36.0           ~ 490 0
8 2MASS J05385492-0228583 Y*O 05 38 54.9294057342 -02 28 58.375274422 21.05 20.21 18.61 17.22 15.48 M4.5 24 0
9 LDN 1641 MoC 05 39.0 -07 00           ~ 428 0
10 [W96] 4771-1075 LM* 05 39 05.4085166628 -02 32 30.366076729 17.541 15.79 14.42 13.54 12.70 K7e 22 0
11 Mayrit 425070 Y*O 05 39 11.4014704592 -02 33 32.826664924 21.773 21.52 19.94 18.32 16.43 M5e 25 0
12 NGC 2264 OpC 06 40 58 +09 53.7     3.9     ~ 1602 1
13 V* BX Ant TT* 10 18 28.6989165716 -31 50 02.826261802   13.39 11.454 11.382 9.325 M0Ve 103 0
14 NAME Cha I MoC 11 06 48 -77 18.0           ~ 985 1
15 CD-29 8887 TT* 11 09 13.8074415397 -30 01 40.070212113   12.95 11.119 10.642 8.875 M2Ve 111 0
16 CD-34 7390A TT* 11 21 17.2193442623 -34 46 45.500772910   12.88 11.46 11.43 9.57 M1Ve 83 0
17 CD-34 7390 ** 11 21 17.24 -34 46 45.5     11.080   9.038 M1Ve+M1Ve 56 0
18 TWA 26 LM* 11 39 51.1435262748 -31 59 21.473337261         15.83 M8e 97 0
19 CD-36 7429B TT* 11 48 23.7347470027 -37 28 48.519698919   15.43 14.00   11.45 M1V 66 0
20 CD-36 7429A TT* 11 48 24.2226856081 -37 28 49.112368947   12.54 11.17 10.92 9.552 K5V 107 0
21 NAME Chamaeleon Region SFR 11 55 -78.0           ~ 694 0
22 V* V1249 Cen TT* 12 15 30.7203284919 -39 48 42.605543199   13.09 11.160 10.919 9.50 M0.5 84 0
23 V* V1250 Cen TT* 12 34 20.4718890806 -48 15 19.545698484   13.3 12.2   11.80 M3 34 0
24 V* V1251 Cen TT* 12 34 20.6481566533 -48 15 13.530604360   13.3 12.2   11.90 M3.5 39 0
25 1RXS J123420.1-481514 ** 12 34 20.65 -48 15 13.6           ~ 13 0
26 Sz 65 Or* 15 39 27.7717320499 -34 46 17.209059896   13.11 12.13 11.33 10.76 K7 73 0
27 Sz 66 TT* 15 39 28.2834975101 -34 46 18.086529821   14.9   14.51 12.56 M2 41 0
28 V* MU Lup TT* 15 40 41.1703115673 -37 56 18.539632353     12.35     K6 15 0
29 2MASS J15414081-3345188 Y*O 15 41 40.8089583953 -33 45 18.862191968         17.38 M6.5 14 0
30 NAME Lupus I Cld 15 43 02.1 -34 09 06           ~ 227 0
31 2MASS J15430624-3920194 TT* 15 43 06.2450955333 -39 20 19.482414922     12.25     K6 11 0
32 2MASS J15445789-3423392 Y*O 15 44 57.8923724839 -34 23 39.364812934   18.38 17.74 17.29 15.28 M5.0e 25 0
33 2MASS J15450887-3417333 Y*O 15 45 08.8747567515 -34 17 33.460978147       18.73   M5.5 30 0
34 CD-33 10685 Or* 15 45 12.8670160092 -34 17 30.646921079 12.47 11.56 10.224 9.60 8.685 K3Ve 221 1
35 V* HW Lup Or* 15 45 17.4119603565 -34 18 28.293017151   17.41 16.25     M1 53 0
36 2MASS J15451851-3421246 Y*O 15 45 18.5160162909 -34 21 24.564123500   17.95   17.35   M6.5 14 0
37 V* GW Lup Or* 15 46 44.7292759994 -34 30 35.677245389   13.8       M1.5e 86 0
38 V* HM Lup Or* 15 47 50.6290613485 -35 28 35.404500425   15.96       M3e 62 0
39 THA 15-5 TT* 15 47 56.9433443193 -35 14 34.797849332   14.5 16.2     K7e 64 0
40 V* HN Lup Or* 15 48 05.2154956876 -35 15 53.295162846           M3.5e 49 0
41 CD-35 10525 Or* 15 49 12.1055573607 -35 39 05.053991067 12.19 12.76 11.66 11.15   K7Ve 240 0
42 Sz 76 TT* 15 49 30.7354526514 -35 49 51.418314548   14.4       M3.2 34 0
43 Sz 77 TT* 15 51 46.9579216483 -35 56 44.112995611   12.0       K5.5 53 0
44 THA 15-8 TT* 15 53 41.1668020196 -39 00 37.116322256   11.6 11.5     ~ 12 0
45 THA 15-9 TT* 15 53 42.6868709624 -38 08 10.466422483   11.7 11.5     ~ 11 0
46 NAME THA 15-10A Y*O 15 55 50.2817116421 -38 01 33.696904246           M4.5 6 0
47 THA 15-10 TT* 15 55 50.289888 -38 01 33.50928   16.24 14.88 14.74   M5.1 33 0
48 NAME THA 15-10B Y*O 15 55 50.3364022290 -38 01 31.865473844           M5.5 4 0
49 WRAY 15-1384 TT* 15 56 02.0991789524 -36 55 28.274442471 14.91 15.05 13.85 12.91 11.86 M1 29 0
50 THA 15-12 Or* 15 56 09.2067120748 -37 56 06.126159332   13.12 11.93 11.45   M0e 256 0
51 V* RU Lup Or* 15 56 42.3109948086 -37 49 15.473469159 9.27 10.07 9.60     K7/M0e 389 0
52 NAME Lup II MoC 15 57 08 -37 47.1           ~ 91 1
53 Sz 84 TT* 15 58 02.5212129160 -37 36 02.733294310   14.3       M5.0e 52 0
54 WRAY 15-1400 TT* 15 59 16.4714616661 -41 57 10.300292528   13.5 12.0     K7IVe 61 0
55 2MASS J15592523-4235066 Y*O 15 59 25.2348817583 -42 35 06.574333595   17.42 16.82     M5 16 0
56 V* RY Lup Or* 15 59 28.3852522995 -40 21 51.255321659   12.62 9.90     G8/K1IV-V 170 0
57 IRAS 15563-4146 AB* 15 59 45.2705819588 -41 54 57.121611892   18.27 14.41 13.42 11.56 ~ 7 0
58 2MASS J16000060-4221567 Y*O 16 00 00.6025556934 -42 21 56.821022044   17.29 15.85 15.25 13.43 M4.5 24 0
59 2MASS J16000236-4222145 Y*O 16 00 02.3596641694 -42 22 14.595263750   16.86 15.46 14.98 13.59 M4 29 0
60 IRAS 15567-4141 LP? 16 00 07.4124438132 -41 49 48.699754698       16.30   ~ 12 1
61 2MASS J16002612-4153553 Y*O 16 00 26.1203643851 -41 53 55.381248967   16.57 16.45 15.70 13.80 M5.25 24 0
62 Sz 130 TT* 16 00 31.0374928462 -41 43 36.991093739   15.82 14.71 13.56 12.46 M1.5 44 0
63 IRAS 15571-4217 LP? 16 00 34.3949435471 -42 25 38.581854714   16.92 17.39 15.56   ~ 7 0
64 V* MY Lup TT* 16 00 44.5199369001 -41 55 30.931594414   12.64 12.17 11.06   K0 62 0
65 Sz 131 Y*O 16 00 49.4334861658 -41 30 03.918935711   17.51 16.13 14.60 12.92 M2 28 0
66 HD 325367 Or* 16 03 05.4914377137 -40 18 25.426543472   11.40 8.50     M0 282 0
67 NAME Lupus IV MoC 16 03 12.4 -42 07 43           ~ 125 0
68 Sz 133 Y*O 16 03 29.3676884922 -41 40 01.858389664   17.77 16.60 15.78 15.04 K2 34 0
69 V* HO Lup A Y*O 16 07 00.5996246992 -39 02 19.517159959           M0 7 0
70 V* HO Lup B Y*O 16 07 00.6750793403 -39 02 18.258247935           M4.5 6 0
71 2MASS J16070384-3911113 Y*O 16 07 03.8309506752 -39 11 11.679148554       18.79 16.80 M4.5 29 0
72 2MASS J16070854-3914075 LM* 16 07 08.5541572537 -39 14 07.513184501   17.85   18.67 17.86 M1.75 26 0
73 2MASS J16070863-3947219 Y*? 16 07 08.6278455005 -39 47 21.859888575   15.38 14.04 13.50   ~ 6 0
74 THA 15-21 TT* 16 07 10.0693512723 -39 11 03.258471635   15.28 13.70 13.70 12.49 K7-M0 54 0
75 THA 15-20 TT* 16 07 11.5876160594 -39 03 47.490881982   16.25 14.58 14.11 12.92 M0.5 76 0
76 2MASS J16073773-3921388 Y*O 16 07 37.7338427461 -39 21 38.749993258   18.38 17.4 17.12 15.68 M5.5e 32 0
77 Sz 94 TT* 16 07 49.5977000657 -39 04 28.760980696   16.31 16.00 14.76 12.90 ~ 27 0
78 Sz 95 TT* 16 07 52.3113021630 -38 58 06.092190897   16.39 14.57 14.25 12.53 ~ 39 0
79 2MASS J16080017-3902595 Y*O 16 08 00.1728975807 -39 02 59.503265866   16.94 17.01 16.72 14.31 M5.5e 34 0
80 2MASS J16080618-3912225 Y*O 16 08 06.1847356015 -39 12 22.557197482       18.00 13.76 ~ 13 1
81 Sz 96 TT* 16 08 12.6306575418 -39 08 33.469578208   14.80 13.43 13.69 11.84 ~ 65 0
82 2MASS J16081497-3857145 Y*O 16 08 14.9860473609 -38 57 14.441818824       18.93 17.42 4.75 33 0
83 SONYC Lup3-5 LM* 16 08 16.0418067283 -39 03 04.322083980   17.74 19.92 18.15 15.28 M7.5 20 0
84 THA 15-24 Y*O 16 08 21.8039413126 -39 04 21.489571046   16.18 14.61 14.67 12.92 M3 46 0
85 V* V1279 Sco Or* 16 08 22.4935035747 -39 04 46.427826148   14.99 13.66 11.70 11.21 M0.4 88 1
86 THA 15-25 Y*O 16 08 24.0420404465 -39 05 49.434128359   15.49 16.00 15.39 14.17 M3.5 38 0
87 THA 15-26 Y*O 16 08 25.7651773769 -39 06 01.220655906   16.62 15.43 14.97 13.12 M5 53 0
88 [LEM2005] Lup 607 Y*O 16 08 28.08 -39 13 09.8   17.45   17.76 16.13 M6.5 17 0
89 WRAY 16-203 Or* 16 08 29.7086692265 -39 03 10.994386198   16.26 15.91 15.38 15.69 K0: 153 1
90 THA 15-29 Y*O 16 08 30.2690257641 -39 06 11.174771741   14.8 11.14 15.18 13.15 M4 52 0
91 IRAS 16051-3820 Y*O 16 08 30.6992185515 -38 28 26.847010777   11.89 11.15 10.67   K2 39 0
92 THA 15-30 TT* 16 08 30.8149015625 -39 05 48.840814971   15.2 15.25 13.96 13.57 M5 48 0
93 2MASS J16083578-3903479 Y*O 16 08 35.7827668528 -39 03 47.934787375   16.88 15.49 15.02 13.09 M6 21 0
94 V* V1094 Sco TT* 16 08 36.1770068081 -39 23 02.462096497 16.01 15.00 13.48 12.47 11.45 ~ 54 1
95 THA 15-31 Em* 16 08 36.9029603891 -40 16 20.384805732   15.0 14     M4 16 0
96 2MASS J16083733-3923109 Y*O 16 08 37.3342512532 -39 23 10.926425276   20.1 19.1 20.70 18.44 M7.5e 19 0
97 Sz 106 Y*O 16 08 39.7599221819 -39 06 25.320570812   15.1   15.00 14.66 M2.5 38 0
98 Sz 107 Y*O 16 08 41.7994782799 -39 01 37.026638986   17.31 16.06 15.42 13.20 M5.5 29 0
99 NAME Sz 108B Y*O 16 08 42.8841122475 -39 06 14.695751140       17.71 14.39 M5 25 0
100 IRAS 16054-3857 Y*O 16 08 49.3978327073 -39 05 39.440608212   16.76 17.71 15.89 14.24 M4.5 43 0
101 V* V1192 Sco Or* 16 08 51.4339982240 -39 05 30.468181083     21.9 18.97 18.18 M5 60 0
102 V* V1193 Sco Or* 16 08 51.5694611925 -39 03 17.705756264   15.27 14.58 13.72 12.28 M4.5 55 0
103 2MASS J16085324-3914401 Y*O 16 08 53.2415720407 -39 14 40.165579947   17.53 16.35 15.35 13.52 M3 33 1
104 2MASS J16085373-3914367 Y*O 16 08 53.7314563013 -39 14 36.829640504       21.73 18.76 M5.5 28 0
105 THA 15-33 TT* 16 08 54.6847312618 -39 37 43.145460615   15.34 13.98 13.29   M1IVe 64 0
106 2MASS J16085529-3848481 Y*O 16 08 55.2905019030 -38 48 48.173805375   17.36   17.24 15.24 M6.5 25 1
107 Sz 112 Y*O 16 08 55.5292331003 -39 02 33.939799154   16.62 15.39 14.78 12.93 M6 54 0
108 THA 15-34 Y*O 16 08 57.8033256003 -39 02 22.851598056   17.46 16.50 16.64 14.65 M6 46 0
109 2MASS J16085953-3856275 Y*O 16 08 59.5393748161 -38 56 27.596410166       19.25 16.91 M8.5e 23 0
110 2MASS J16090141-3925119 Y*O 16 09 01.4148763417 -39 25 11.923408383   16.92 15.31 15.04 13.48 M4 35 0
111 THA 15-35 Or* 16 09 01.8488471357 -39 05 12.416220509   15.33 14.12 14.35 12.54 M5.5 72 0
112 Sz 115 TT* 16 09 06.2136491733 -39 08 51.871061306   16.88 15.48 15.09 13.12 ~ 39 0
113 2MASS J16092697-3836269 Y*O 16 09 26.975 -38 36 26.92   17.55   16.31 14.74 M4.5 20 0
114 NAME Lupus III SFR 16 09.6 -39 03           ~ 273 0
115 THA 15-37 Y*O 16 09 44.3608441561 -39 13 30.167268370   15.84 14.59 14.20 12.38 M2 48 0
116 Sz 118 Y*O 16 09 48.6557347813 -39 11 16.846032967   18.32 16.90 16.61 15.00 K6 49 0
117 2MASS J16095628-3859518 Y*O 16 09 56.2955801075 -38 59 51.582757696   17.37 18.0 16.49 15.28 M6 33 0
118 SONYC Lup3-29 Y*O 16 10 01.3309952901 -39 06 44.824860359   18.38 17.42 17.90 15.27 M7.5 22 0
119 2MASS J16101857-3836125 Y*O 16 10 18.5683658482 -38 36 12.598285096   18.37 16.63 16.67 14.70 M5 19 0
120 2MASS J16101984-3836065 Y*O 16 10 19.8339336690 -38 36 06.581180628   17.39   16.76 15.57 M6.5 25 0
121 2MASS J16102955-3922144 Y*O 16 10 29.5512951868 -39 22 14.456010068   17.51 16.31 15.79 13.90 M4.5 37 0
122 2MASS J16104536-3854547 RG* 16 10 45.3654531935 -38 54 54.727328861   17.51   17.13 16.05 <M1 12 0
123 NAME THA 15-42B Y*O 16 10 51.4489738777 -38 53 12.990740056           M2 3 0
124 THA 15-42 Y*O 16 10 51.5851116158 -38 53 13.768173219   15.89 14.48 14.44 12.95 M1e 55 0
125 2MASS J16114865-3817580 Y*O 16 11 48.6520993846 -38 17 58.090168432   17.04 15.64 15.72 14.99 ~ 10 0
126 2MASS J16115979-3823383 TT* 16 11 59.7951623767 -38 23 38.375533996   18.17 16.55 16.24 14.26 M5.0e 37 0
127 NAME Upper Sco Association As* 16 12 -23.4           ~ 1053 1
128 2MASS J16121120-3832197 Y*O 16 12 11.2110279026 -38 32 19.760083148   18.03   17.25 14.76 ~ 15 0
129 2MASS J16122269-3713276 Y*? 16 12 22.7063544461 -37 13 27.643685611   17.63 15.63 15.76   ~ 6 0
130 2MASS J16124373-3815031 Y*O 16 12 43.7500201062 -38 15 03.075872612   15.00 13.44 13.39 11.61 M1 28 0
131 2MASS J16134410-3736462 Y*O 16 13 44.1006863103 -37 36 46.261197711   17.97   16.37 14.66 M5 19 0
132 NAME Lupus V MoC 16 21 -37.5           ~ 53 0
133 NAME Lupus VI Cld 16 25 -40.3           ~ 40 1
134 NAME Ophiuchus Molecular Cloud SFR 16 28 06 -24 32.5           ~ 3063 0
135 IC 1396 OpC 21 39 00 +57 29.4           ~ 447 1

    Equat.    Gal    SGal    Ecl

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2020.10.21-15:28:10

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