CDS

2017A&A...602A..33F

Query : 2017A&A...602A..33F

2017A&A...602A..33F - Astronomy and Astrophysics, volume 602A, 33-33 (2017/6-1)

X-shooter spectroscopy of young stellar objects in Lupus. Atmospheric parameters, membership, and activity diagnostics.

FRASCA A., BIAZZO K., ALCALA J.M., MANARA C.F., STELZER B., COVINO E. and ANTONIUCCI S.

Abstract (from CDS):

Aims. A homogeneous determination of basic stellar parameters of young stellar object (YSO) candidates is needed to confirm their pre-main sequence evolutionary stage and membership to star forming regions (SFRs), and to get reliable values of the quantities related to chromospheric activity and accretion.
Methods. We used the code ROTFIT and synthetic BT-Settl spectra for the determination of the atmospheric parameters (Teff and logg), veiling (r), radial (RV), and projected rotational velocity (vsini) from X-shooter spectra of 102 YSO candidates (95 of infrared ClassII and seven ClassIII) in the Lupus SFR. The spectral subtraction of inactive templates, rotationally broadened to match the vsini of the targets, enabled us to measure the line fluxes for several diagnostics of both chromospheric activity and accretion, such as Hα, Hβ, CaII, and NaI lines.
Results. We have shown that 13 candidates can be rejected as Lupus members based on their discrepant RV with respect to Lupus and/or the very low logg values. At least 11 of them are background giants, two of which turned out to be lithium-rich giants. Regarding the members, we found that all ClassIII sources have Hα fluxes that are compatible with a pure chromospheric activity, while objects with disks lie mostly above the boundary between chromospheres and accretion. Young stellar objects with transitional disks display both high and low Hα fluxes. We found that the line fluxes per unit surface are tightly correlated with the accretion luminosity (Lacc) derived from the Balmer continuum excess. This rules out that the relationships between Lacc and line luminosities found in previous works are simply due to calibration effects. We also found that the CaII-IRT flux ratio, FCaII8542/FCaII8498, is always small, indicating an optically thick emission source. The latter can be identified with the accretion shock near the stellar photosphere. The Balmer decrement reaches instead, for several accretors, high values typical of optically thin emission, suggesting that the Balmer emission originates in different parts of the accretion funnels with a smaller optical depth.

Abstract Copyright: © ESO, 2017

Journal keyword(s): stars: pre-main sequence - stars: fundamental parameters - stars: chromospheres - 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/602/A33): table1.dat table2.dat table3.dat>

Simbad objects: 115

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Number of rows : 115
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2023 		#notes
1 NAME Ori Region reg 05 35 17.30 -05 23 28.0           ~ 568 0
2 * gam02 Vel WR* 08 09 31.95013 -47 20 11.7108 0.64 1.58 1.83 1.85 2.00 WC8+O7.5III-V 894 0
3 NAME TW Hya Association As* 11 01.9 -34 42           ~ 925 0
4 NAME Cha 1 MoC 11 06 48 -77 18.0           ~ 1132 1
5 Sz 65 Or* 15 39 27.7716659160 -34 46 17.211087984   13.11 12.13 11.33 10.76 K7 96 0
6 Sz 66 TT* 15 39 28.2828956688 -34 46 18.082914564   14.9   14.51 12.56 M2 56 0
7 2MASS J15414081-3345188 Y*O 15 41 40.8086577936 -33 45 18.847533888         17.38 M6.5 19 0
8 Lupus 1 Cld 15 43 02.1 -34 09 06           ~ 278 0
9 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
10 2MASS J15450887-3417333 Y*O 15 45 08.8742780880 -34 17 33.454839372       18.73   M5.5 44 0
11 CD-33 10685 Or* 15 45 12.8678037432 -34 17 30.644403036 12.47 11.56 10.224 9.60 8.685 K3Ve 269 1
12 V* HW Lup Or* 15 45 17.4118414392 -34 18 28.286447220   17.41 16.25     M1 72 0
13 2MASS J15451851-3421246 Y*O 15 45 18.5160315960 -34 21 24.553939896   17.95   17.35   M6.5 19 0
14 V* GW Lup Or* 15 46 44.7290527536 -34 30 35.677420056   13.8       M1.5e 133 0
15 V* HM Lup Or* 15 47 50.6288371920 -35 28 35.404076028   15.941 14.748 14.337   M3e 80 0
16 THA 15-5 TT* 15 47 56.9427182064 -35 14 34.796420412   14.5 16.2     K7e 83 0
17 V* HN Lup Or* 15 48 05.2154956876 -35 15 53.295162846   16.083 14.377 13.726   M3.5e 60 0
18 V* GQ Lup Or* 15 49 12.1053805848 -35 39 05.058139788 12.19 12.76 11.66 11.15   K7Ve 283 1
19 Sz 76 TT* 15 49 30.7355449512 -35 49 51.413284020   16.611 15.095 14.710   M3.2 50 0
20 Sz 77 TT* 15 51 46.9580885472 -35 56 44.112678504   12.0       K5.5 67 0
21 V* R Lup Mi* 15 53 28.9269888792 -36 17 52.166230728   12.08 9.40     M5 26 0
22 THA 15-8 TT* 15 53 41.1667402248 -39 00 37.115189856   11.6 11.5     ~ 13 0
23 THA 15-9 TT* 15 53 42.6872122728 -38 08 10.467552660   11.7 11.5     ~ 12 0
24 NAME THA 15-10A Y*O 15 55 50.2814014152 -38 01 33.699111168           M4.5 13 0
25 THA 15-10 TT* 15 55 50.289888 -38 01 33.50928   16.24 14.88 14.74   M5.1 36 0
26 NAME THA 15-10B Y*O 15 55 50.3362340280 -38 01 31.864857996           M5.5 7 0
27 WRAY 15-1384 TT* 15 56 02.0994258408 -36 55 28.274506140 14.91 14.342 13.470 13.311 11.86 M1 43 0
28 THA 15-12 Or* 15 56 09.2066646912 -37 56 06.126118692   13.12 11.93 11.45   M0e 398 0
29 V* RU Lup TT* 15 56 42.3108692112 -37 49 15.473946900 9.27 10.07 9.60     K7/M0e 454 0
30 Lupus 2 MoC 15 57 08 -37 47.1           ~ 112 1
31 Sz 84 TT* 15 58 02.5198436808 -37 36 02.729938536   14.3       M5.0e 70 0
32 WRAY 15-1400 TT* 15 59 16.4717314824 -41 57 10.300018176   13.5 12.0     K7IVe 92 0
33 2MASS J15592523-4235066 Y*O 15 59 25.2340111704 -42 35 06.571838868   17.42 16.82     M5 22 0
34 V* RY Lup Or* 15 59 28.3864710696 -40 21 51.249496176   12.62 9.90     G8/K1IV-V 218 0
35 UCAC3 96-205744 Y*O 16 00 00.6018563304 -42 21 56.821951152   17.29 15.85 15.25 13.43 M4.5 36 0
36 UCAC3 96-205752 Y*O 16 00 02.3583827328 -42 22 14.600258148   16.86 15.46 14.98 13.59 M4 45 0
37 IRAS 15567-4141 LP* 16 00 07.4120207112 -41 49 48.691592652       16.30   ~ 14 1
38 2MASS J16002612-4153553 Y*O 16 00 26.1203153232 -41 53 55.371567156   16.57 16.45 15.70 13.80 M5.25 34 0
39 Sz 130 TT* 16 00 31.0374709944 -41 43 36.988516560   15.82 14.71 13.56 12.46 M1.5 60 0
40 IRAS 15571-4217 LP* 16 00 34.3942102824 -42 25 38.575025004   16.92 17.39 15.56   ~ 8 0
41 V* MY Lup TT* 16 00 44.5202267160 -41 55 30.935126748   12.64 12.17 11.06   K0 108 0
42 Sz 131 Y*O 16 00 49.4333360352 -41 30 03.916812096   17.51 16.13 14.60 12.92 M2 40 0
43 NAME Lupus Complex SFR 16 03 -38.1           ~ 689 0
44 HD 325367 Or* 16 03 05.4915085848 -40 18 25.426727676   11.40 8.50     M0 334 0
45 Lupus 4 MoC 16 03 12.4 -42 07 43           ~ 149 0
46 Sz 133 Y*O 16 03 29.3848659360 -41 40 01.765426548   17.77 16.60 15.78 15.04 K2 47 0
47 V* HO Lup A Y*O 16 07 00.5998021080 -39 02 19.515199452           M0 14 0
48 V* HO Lup Or* 16 07 00.603672 -39 02 19.49316   13.94 13.17 13.03   M1e 65 0
49 V* HO Lup B Y*O 16 07 00.6752385384 -39 02 18.260138076           M4.5 12 0
50 2MASS J16070384-3911113 Y*O 16 07 03.84336 -39 11 11.3208       18.79 16.80 M4.5 40 0
51 2MASS J16070854-3914075 LM* 16 07 08.5530917712 -39 14 07.494035352   17.85   18.67 17.86 M1.75 38 0
52 2MASS J16070863-3947219 Y*? 16 07 08.6277721800 -39 47 21.860724696   15.38 14.04 13.50   ~ 7 0
53 THA 15-21 TT* 16 07 10.0694468880 -39 11 03.260683896   15.28 13.70 13.70 12.49 K7-M0 70 0
54 THA 15-20 TT* 16 07 11.5873449384 -39 03 47.492129340   16.25 14.58 14.11 12.92 M0.5 104 0
55 THA 15-22 Y*O 16 07 15.1613436144 -40 03 41.329768716   13.8 12.98     ~ 9 0
56 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
57 Sz 94 TT* 16 07 49.5974149968 -39 04 28.760342844   16.31 16.00 14.76 12.90 ~ 32 0
58 Sz 95 TT* 16 07 52.3109740056 -38 58 06.091698756   16.714 15.189 14.934 12.53 ~ 52 0
59 2MASS J16080017-3902595 Y*O 16 08 00.1718615064 -39 02 59.504573976   16.94 17.01 16.72 14.31 M5.5e 44 0
60 2MASS J16080618-3912225 LP* 16 08 06.1851371808 -39 12 22.547243232       18.00 13.76 ~ 15 1
61 Sz 96 TT* 16 08 12.6308620920 -39 08 33.470354256   14.80 13.43 13.69 11.84 ~ 77 0
62 2MASS J16081497-3857145 Y*O 16 08 14.9753942112 -38 57 14.409165492       18.93 17.42 4.75 41 0
63 SONYC Lup3-5 LM* 16 08 16.0404001440 -39 03 04.320708732   17.74 19.92 18.15 15.28 M7.5 26 0
64 THA 15-24 Y*O 16 08 21.8037909864 -39 04 21.491863824   16.18 14.61 14.67 12.92 M3 57 0
65 V* V1279 Sco Or* 16 08 22.4935277520 -39 04 46.427612052   14.99 13.66 11.70 11.21 M0.4 115 1
66 THA 15-25 Y*O 16 08 24.0422612880 -39 05 49.433170740   15.49 16.00 15.39 14.17 M3.5 48 0
67 THA 15-26 Y*O 16 08 25.7633674272 -39 06 01.247043888   16.62 15.43 14.97 13.12 M5 65 0
68 SSTc2d J160828.1-391310 Y*O 16 08 28.1226362485 -39 13 09.781567277   17.45   17.76 16.13 M6.5 28 0
69 WRAY 16-203 Or* 16 08 29.7275063376 -39 03 11.024360496   16.26 15.91 15.38 15.69 K0: 168 1
70 THA 15-29 Y*O 16 08 30.2687378568 -39 06 11.176056000   14.8 11.14 15.18 13.15 M4 63 0
71 IRAS 16051-3820 Y*O 16 08 30.6994064064 -38 28 26.846324004   11.89 11.15 10.67   K2 67 0
72 THA 15-30 TT* 16 08 30.8142130416 -39 05 48.837746436   15.2 15.25 13.96 13.57 M5 59 0
73 UCAC3 102-194847 Y*O 16 08 35.7826940376 -39 03 47.933557092   16.88 15.49 15.02 13.09 M6 28 0
74 V* V1094 Sco TT* 16 08 36.1772010696 -39 23 02.464980972 16.01 15.00 13.48 12.47 11.45 ~ 75 1
75 THA 15-31 LP? 16 08 36.9025257864 -40 16 20.380514952   15.0 14     M4 19 0
76 2MASS J16083733-3923109 Y*O 16 08 37.3331402112 -39 23 10.926378348   20.1 19.1 20.70 18.44 M7.5e 23 0
77 Sz 106 Y*O 16 08 39.7597402848 -39 06 25.321212288   15.1   15.00 14.66 M2.5 46 0
78 Sz 107 Y*O 16 08 41.7980924472 -39 01 37.038551232   17.31 16.06 15.42 13.20 M5.5 40 0
79 Sz 108 TT* 16 08 42.7394012688 -39 06 18.313411608   14.497 13.058 12.824 11.16 ~ 39 0
80 NAME Sz 108B Y*O 16 08 42.8838783888 -39 06 14.692839804       17.71 14.39 M5 36 0
81 IRAS 16054-3857 Y*O 16 08 49.3987083072 -39 05 39.447341844   16.76 17.71 15.89 14.24 M4.5 52 0
82 V* V1192 Sco Or* 16 08 51.4348063536 -39 05 30.460358652     21.9 18.97 18.18 M5 71 0
83 V* V1193 Sco Or* 16 08 51.5693655096 -39 03 17.707587264   15.27 14.58 13.72 12.28 M4.5 69 0
84 UCAC3 102-194910 Y*O 16 08 53.2420957464 -39 14 40.160339952   17.53 16.35 15.35 13.52 M3 48 1
85 2MASS J16085373-3914367 Y*O 16 08 53.7357629040 -39 14 36.799256184       21.73 18.76 M5.5 36 0
86 THA 15-33 TT* 16 08 54.6849382512 -39 37 43.145069664   15.34 13.98 13.29   M1IVe 90 0
87 2MASS J16085529-3848481 Y*O 16 08 55.2899613672 -38 48 48.174613416   17.36   17.24 15.24 M6.5 35 1
88 Sz 112 Y*O 16 08 55.5289090032 -39 02 33.941081832   16.62 15.39 14.78 12.93 M6 65 0
89 THA 15-34 Y*O 16 08 57.8026653048 -39 02 22.853868252   17.46 16.50 16.64 14.65 M6 58 0
90 2MASS J16085953-3856275 Y*O 16 08 59.5395612120 -38 56 27.592929708       19.25 16.91 M8.5e 31 0
91 2MASS J16090141-3925119 Y*O 16 09 01.4148377304 -39 25 11.923332420   16.92 15.31 15.04 13.48 M4 49 0
92 THA 15-35 Or* 16 09 01.8486544824 -39 05 12.414717240   15.33 14.12 14.35 12.54 M5.5 101 0
93 Sz 115 TT* 16 09 06.2137580736 -39 08 51.873869400   16.88 15.48 15.09 13.12 ~ 49 0
94 2MASS J16092697-3836269 Y*O 16 09 26.9795990952 -38 36 26.933727420   17.55   16.31 14.74 M4.5 30 0
95 Lupus 3 SFR 16 09.6 -39 03           ~ 318 0
96 THA 15-37 Y*O 16 09 44.3607357216 -39 13 30.167581764   15.84 14.59 14.20 12.38 M2 59 0
97 Sz 118 Y*O 16 09 48.6562295568 -39 11 16.847425032   18.32 16.90 16.61 15.00 K6 63 0
98 2MASS J16095628-3859518 Y*O 16 09 56.2954845696 -38 59 51.581549796   17.37 18.0 16.49 15.28 M6.0e 45 0
99 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
100 THA 15-40 TT* 16 10 12.1994252424 -39 21 17.990363016   15.70 14.06 13.88 11.84 ~ 31 0
101 THA 15-41 TT* 16 10 16.4255309472 -39 08 05.033094180   15.33 13.73 13.28 12.12 M2 32 0
102 2MASS J16101857-3836125 Y*O 16 10 18.5677223424 -38 36 12.598346628   18.37 16.63 16.67 14.70 M5 29 0
103 2MASS J16101984-3836065 Y*O 16 10 19.8333629688 -38 36 06.586243272   17.39   16.76 15.57 M6.5 34 0
104 2MASS J16102955-3922144 Y*O 16 10 29.5517478000 -39 22 14.451017844   17.51 16.31 15.79 13.90 M4.5 50 0
105 2MASS J16104536-3854547 RG* 16 10 45.3653978616 -38 54 54.728034696   17.51   17.13 16.05 <M1 17 0
106 NAME THA 15-42B Y*O 16 10 51.4487859072 -38 53 12.993835812           M2 9 0
107 THA 15-42 Y*O 16 10 51.5849835192 -38 53 13.767885384   15.89 14.48 14.44 12.95 M1e 72 0
108 2MASS J16114865-3817580 Y*O 16 11 48.6524006736 -38 17 58.088822352   17.04 15.64 15.72 14.99 ~ 12 0
109 2MASS J16115979-3823383 TT* 16 11 59.7947194344 -38 23 38.374012212   18.17 16.55 16.24 14.26 M5.0e 47 0
110 2MASS J16121120-3832197 Y*O 16 12 11.2108041432 -38 32 19.758929100   18.03   17.25 14.76 ~ 20 0
111 2MASS J16122269-3713276 LP* 16 12 22.7052583440 -37 13 27.640524972   17.63 15.63 15.76   ~ 8 0
112 UCAC3 104-204438 Y*O 16 12 43.7499349656 -38 15 03.075603264   15.00 13.44 13.39 11.61 M1 42 0
113 2MASS J16125594-3756435 LP* 16 12 55.9461327696 -37 56 43.730578608   17.47 15.45 14.22 10.98 ~ 6 0
114 2MASS J16134410-3736462 Y*O 16 13 44.1007544088 -37 36 46.261518840   17.97   16.37 14.66 M5 26 0
115 NAME Vela Star Cloud ClG ~ ~           ~ 23 0

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2023.09.27-14:20:14

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