2008A&A...487..965S


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.13CEST00:40:13

2008A&A...487..965S - Astronomy and Astrophysics, volume 487, 965-973 (2008/9-1)

An assessment of Li abundances in weak-lined and classical T Tauri stars of the Taurus-Auriga association.

SESTITO P., PALLA F. and RANDICH S.

Abstract (from CDS):

Accurate measurements of lithium abundances in young low-mass stars provide an independent and reliable age diagnostics. Previous studies of nearby star forming regions have identified significant numbers of Li-depleted stars, often at levels inconsistent with the ages indicated by their luminosity. We aim at a new and accurate analysis of Li abundances in a sample of ∼100 pre-main sequence stars in Taurus-Auriga using a homogeneous and updated set of stellar parameters and model atmospheres appropriate for the spectral types of the sample stars. We compute Li abundances using published values of the equivalent widths of the Li λ6708 Å doublet obtained from medium/high resolution spectra. We find that the number of significantly Li-depleted stars in Taurus-Auriga is greatly reduced with respect to earlier results. Only 13 stars have abundances lower than the interstellar value by a factor of 5 or greater. All of them are weak-lined T Tauri stars drawn from X-ray surveys; with the exception of four stars located near the L1551 and L1489 dark clouds, all the Li-depleted stars belong to the class of dispersed low-mass stars, distributed around the main sites of current star formation. If located at the distance of Taurus-Auriga, the stellar ages implied by the derived Li abundances are in the range 3-30 Myr, greater than the bulk of the Li-rich population with implication on the star formation history of the region. In order to derive firm conclusions about the fraction of Li-depleted stars of Taurus-Auriga, Li measurements of the remaining members of the association should be obtained, in particular of the group of stars that fall in the Li-burning region of the HR diagram.

Abstract Copyright:

Journal keyword(s): stars: abundances - stars: evolution - stars: formation - open clusters and associations: individual: Taurus-Auriga

CDS comments: Paragraph.3.1. 045230+1746 is a probable misprint for NTTS 043230+1746. Paragraph.3.4 034903+2437 is a misprint for NTTS 034903+2431. 042147+1744 is a misprint for NTTS 042417+1744. Table 1 Anon 1 = NAME Herbig's Anon 1 = HBC 366.

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 - 2020
#notes
1 V* V1224 Tau Or* 03 29 38.3693557066 +24 30 37.867407755   13.037 12.160   11.111 K1 57 0
2 Cl Melotte 22 OpC 03 47 00 +24 07.0           ~ 2979 0
3 V* V679 Tau TT* 03 52 02.2217462456 +24 39 47.690003665   13.57 11.41 11.89 10.77 K5e 114 0
4 2MASS J03542950+3203013 TT* 03 54 29.5045697196 +32 03 01.407089906   12.71 11.85     G0 48 0
5 2MASS J03543017+3203043 TT* 03 54 30.17472 +32 03 04.3488   13.25 12.31     G5 50 0
6 2MASS J03543556+2537111 TT* 03 54 35.5599485201 +25 37 11.176094579   14.90 13.79     K3 34 0
7 2MASS J03543597+2537081 TT* 03 54 35.9683327179 +25 37 08.087063799   13.59 12.67     K2 40 0
8 BD+21 577 PM* 04 02 53.5740256642 +22 08 11.682533077   9.46 8.89     G0 38 0
9 V* V1067 Tau A TT* 04 03 13.9544410795 +25 52 59.084182120           K3e 42 0
10 V* V1067 Tau Or* 04 03 13.959264 +25 52 59.65104   13.83 12.83 12.69   K3e+K3e 42 0
11 V* V1067 Tau B TT* 04 03 13.9630520870 +25 53 00.374400100   13.96 12.91     K3e 28 0
12 HD 285372 TT* 04 03 24.9512643312 +17 24 26.049241916   13.17 11.60 11.22   K3V: 34 0
13 2MASS J04034930+2610520 TT* 04 03 49.308 +26 10 52.03   15.99 14.52     M3.9 61 0
14 2MASS J04035084+2610531 TT* 04 03 50.8393021714 +26 10 53.015575434   15.57 14.17     M2.8 52 0
15 BD+21 584 TT* 04 04 28.4881972312 +21 56 04.542823294   10.04 9.58 9.56   F8 40 0
16 2MASS J04043936+2158186 TT* 04 04 39.3724734118 +21 58 18.564536279   16.54 14.97     M3.4 57 0
17 2MASS J04043984+2158215 TT* 04 04 39.8534209118 +21 58 21.474760489   16.61 15.09     M3.2 49 0
18 LDN 1489 DNe 04 04 47.5 +26 19 42           ~ 195 0
19 V* V1298 Tau TT* 04 05 19.5912137335 +20 09 25.563534185   11.11 10.12 9.57   K1 43 0
20 2MASS J04053087+2151106 TT* 04 05 30.8840553626 +21 51 10.621687163   16.04 14.67     M2.7 52 0
21 V* V1299 Tau Ir* 04 05 40.5863049882 +22 48 11.824767557   9.99 9.39     G3V: 48 0
22 HD 284149 TT* 04 06 38.7980686799 +20 18 11.150823396   10.21 9.63     F8 42 0
23 HD 281691 TT* 04 09 09.7467623485 +29 01 30.301321238   11.48 10.68 10.24   G8III 43 0
24 V* V1304 Tau TT* 04 09 17.0024419993 +17 16 08.259253957   14.58 13.20     M1 22 0
25 V* V1306 Tau TT* 04 09 51.1327684125 +24 46 21.068711594   14.72 13.30     M1 30 0
26 V* V1307 Tau TT* 04 12 50.629008 +19 36 57.76200   13.87 12.58 12.59   K6 25 0
27 V* V1095 Tau TT* 04 13 14.1550545701 +28 19 10.670834057   15.32 13.81 13.62   M4 96 0
28 V* V1096 Tau TT* 04 13 27.2226142854 +28 16 24.653683705   15.42 13.53 13.07   M0 71 0
29 HD 283447 Or* 04 14 12.9232870093 +28 12 12.378540314 13.17 12.07 10.68 9.45 8.67 K3Ve 380 0
30 V* V1098 Tau Or* 04 14 47.9897419517 +27 52 34.232647358   14.08 11.73 10.95   M1 105 0
31 EM* LkCa 4 Or* 04 16 28.1070192558 +28 07 35.732032828   13.96   11.825   K7:Ve 142 0
32 V* V1312 Tau TT* 04 17 38.9462203679 +28 33 00.570855332   15.57 13.26 13.12   M2 88 0
33 2MASS J04182147+1658470 TT* 04 18 21.4747288784 +16 58 46.997648983   14.37 13.26     K5 49 0
34 V* V410 Tau Or* 04 18 31.1083261392 +28 27 16.155411536   12.13 10.75 8.45 9.408 K3Ve 424 0
35 V* CZ Tau Or* 04 18 31.5906879009 +28 16 58.161795569 15.96 16.60 15.70 14.77   M2 128 0
36 V* V1023 Tau Or* 04 18 47.0296109602 +28 20 07.490327496   14.31 12.00 11.21   K7 141 0
37 V* V1069 Tau Or* 04 18 51.7034617249 +17 23 16.579842927   13.32 12.22 12.22 10.944 K7e 99 0
38 V* BP Tau Or* 04 19 15.8342975037 +29 06 26.929456808   13.13 12.12 11.89   K5/7Ve 599 0
39 WK81 1 TT* 04 19 26.2671630797 +28 26 14.259129093   14.81   12.240   K7 193 1
40 V* V1070 Tau Or* 04 19 41.2688488305 +27 49 48.151086734   13.75 12.25 11.14   M0 133 0
41 V* V652 Per TT* 04 20 24.1152190932 +31 23 23.687360829   13.54       K4 21 0
42 V* DE Tau Or* 04 21 55.6346296353 +27 55 06.184221341 15.18 15.13 13.80     M3Ve 222 0
43 V* RY Tau Or* 04 21 57.4132838427 +28 26 35.533990877 10.82 10.34 9.30 9.67 8.87 K1IV/Ve 649 1
44 V* T Tau Or* 04 21 59.4323326335 +19 32 06.439974179   11.01 9.30 9.80   K0IV/Ve 1249 2
45 EM* LkCa 21 Or* 04 22 03.1462377202 +28 25 39.099044680   10.94       M3/4Ve 76 0
46 HD 285751 TT* 04 23 41.3219281196 +15 37 54.899767190   12.42 11.56     K2V: 41 0
47 V* V1201 Tau TT* 04 24 48.1544290459 +26 43 16.062111003   13.53 11.26 10.88   K1 37 0
48 V* IP Tau Or* 04 24 57.0823478325 +27 11 56.543062579   14.50   12.46   M0:Ve 190 0
49 V* DF Tau B * 04 27 02.79 +25 42 22.4     13.51     M3.5e 19 0
50 V* DF Tau Or* 04 27 02.7917481241 +25 42 22.456361256 11.97 12.25 11.42 10.31 9.14 M3Ve 459 1
51 V* DG Tau Or* 04 27 04.6913654419 +26 06 16.041555299 13.57 13.97 10.50 12.28   K6Ve 923 1
52 HD 285778 Or* 04 27 10.5694001840 +17 50 42.660851333   11.07 10.22     K1e 124 0
53 V* DI Tau Or* 04 29 42.4736177473 +26 32 49.119618729 16.39 15.20 13.60     M0Ve 194 0
54 NAME Tau-Aur Complex SFR 04 30 +25.0           ~ 1217 0
55 V* UX Tau B TT* 04 30 03.5778750604 +18 13 49.477040697       13.33   M1Ve 61 0
56 V* UX Tau A TT* 04 30 03.9931880444 +18 13 49.476948664   12.92 11.15     K2Ve 327 0
57 V* UX Tau Or* 04 30 03.99626 +18 13 49.4355 11.23 11.84 10.80 9.83 9.05 K2Ve+M1Ve 311 0
58 V* DK Tau A * 04 30 44.2409691803 +26 01 24.730398215           K5Ve 248 0
59 V* DK Tau Or* 04 30 44.243376 +26 01 24.65328 13.32 14.59 13.05 12.08   K7e+K7e 295 0
60 EM* LkHA 331 TT* 04 31 23.814648 +24 10 52.98312   16.30 14.73 14.98   M4.5V 95 0
61 HBC 392 Or* 04 31 27.1756563044 +17 06 24.745482804   13.71       K5e 70 0
62 LDN 1551 DNe 04 31 30.0 +18 12 30           ~ 768 1
63 V* HL Tau Or* 04 31 38.471952 +18 13 58.08504   15.89 14.49 14.39   K5 1201 0
64 IRAS 04287+1807 mul 04 31 38.8 +18 13 57           ~ 796 0
65 V* V710 Tau B TT* 04 31 57.7916444904 +18 21 37.947621353   15.07 13.55 13.98   M0.5/1e 50 0
66 L 1551-51 Or* 04 32 09.2838548075 +17 57 22.695083303   13.29       K7e 118 0
67 V* V827 Tau TT* 04 32 14.5731257511 +18 20 14.719337994   14.00 12.63 12.35   K7Ve 158 0
68 V* V928 Tau Or* 04 32 18.8839760967 +24 22 26.713747659 17.65   13.7     M0.5 81 0
69 V* GG Tau Or* 04 32 30.3318954228 +17 31 40.834888327 14.84 14.78 13.40 11.54   M0e+M2.0e 647 1
70 NAME TAU-AUR T ASSOC Cl* 04 32 33 +26 04.6           ~ 43 0
71 V* UZ Tau B TT* 04 32 42.82968 +25 52 31.4148   14.07 12.72 13.35   M1/3Ve 136 0
72 V* UZ Tau ** 04 32 43.02168 +25 52 30.9036           M4Ve+M1/3Ve 285 0
73 V* UZ Tau A TT* 04 32 43.0744163742 +25 52 31.022242441       13.15   M2.0e+M3.0e 88 0
74 V* V1076 Tau Or* 04 32 43.7360056323 +18 02 56.310753348   14.72       K7 84 0
75 V* GH Tau Or* 04 33 06.2181025969 +24 09 33.628411049     13.20 12.59   M3Ve 167 0
76 V* V830 Tau TT* 04 33 10.0299730541 +24 33 43.255853678   13.91 12.08 11.30   M0-1 171 1
77 LDN 1536 DNe 04 33 24.6 +22 43 29           ~ 94 0
78 V* IS Tau Or* 04 33 36.7943820957 +26 09 49.071437296 18.52     14.79   M2.0 114 0
79 V* DL Tau Or* 04 33 39.0766866461 +25 20 38.097973550 14.04 14.59 13.40 11.85 10.89 K7Ve 282 0
80 V* CI Tau Or* 04 33 52.0144455735 +22 50 30.093741884 14.97 15.09 13.80     K4IVe 261 1
81 V* V1077 Tau Or* 04 34 18.0134345949 +18 30 06.335688396   13.70       G8 74 0
82 V* AA Tau Or* 04 34 55.4222683130 +24 28 53.038273587 13.14 13.34 12.20     K5Ve 626 0
83 HD 285898 Or* 04 35 14.1984242134 +18 21 35.579726828   11.69 11.39     G0 29 0
84 2MASS J04352450+1751429 TT* 04 35 24.5038529437 +17 51 42.495480359   15.680 14.030 13.310   M1.5 49 2
85 V* DN Tau Or* 04 35 27.3776240781 +24 14 58.908761629 13.56 12.88 11.50 11.79   M1:Ve 348 0
86 V* V1324 Tau TT* 04 35 56.8363477553 +23 52 05.048150834   15.01 13.57     M1 25 0
87 V* V1115 Tau TT* 04 36 19.1014976181 +25 42 58.999936422   12.97 11.76 10.81 10.228 M0 76 0
88 V* V961 Per TT* 04 37 16.8631872106 +31 08 19.584718873   14.54 13.24     K4 19 0
89 V* V1325 Tau TT* 04 38 13.0523414917 +20 22 46.839665447   13.33 12.22 11.81   K2 27 0
90 V* V1117 Tau Er* 04 38 15.6143158055 +23 02 27.544206594   15.12       M1 27 0
91 V* V1326 Tau TT* 04 38 27.6518837924 +15 43 37.960367125   14.47 13.29     K3 16 0
92 V* HV Tau Or* 04 38 35.2903493114 +26 10 38.646251388           M1Ve 115 0
93 HD 285957 TT* 04 38 39.0724854610 +15 46 13.573834737   11.75 10.863   9.616 K2 35 0
94 V* VY Tau Or* 04 39 17.4208176970 +22 47 53.361809753     9.00     M0Ve 180 0
95 EM* LkCa 15 Or* 04 39 17.7912813350 +22 21 03.387667491   13.01 12.03 11.61   K5:Ve 552 1
96 V* IW Tau Or* 04 41 04.7179844751 +24 51 06.034940625   14.25 12.595 11.65 10.504 K7Ve 105 0
97 HD 283798 TT* 04 41 55.1543715719 +26 58 49.419486301   10.21 9.55     G2 43 0
98 HD 30171 TT* 04 45 51.2962628576 +15 55 49.633228798   10.12 9.36   8.439 G5 41 0
99 V* DR Tau Or* 04 47 06.2152696011 +16 58 42.814250257 12.03 11.86 10.50 12.19   K5Ve 467 0
100 V* DS Tau Or* 04 47 48.5954846337 +29 25 11.189809829 13.11 13.16 12.30 12.37 10.80 K4Ve 208 0
101 V* UY Aur Or* 04 51 47.3900418279 +30 47 13.552212742 12.82 12.96 11.90 10.59 9.52 M0e+M2.5e 326 0
102 V* GM Aur Or* 04 55 10.9813656049 +30 21 59.375978047 14.59 14.22 13.10     K3Ve 552 0
103 HD 282630 Or* 04 55 36.9698052301 +30 17 55.100440086   12.17 11.12 10.55   K0Ve 150 0
104 V* SU Aur Or* 04 55 59.3861369488 +30 34 01.499800471   10.33 9.30 9.17   G2IIIne 534 0
105 V* V397 Aur Or* 04 56 02.0261376554 +30 21 03.635056925   13.07 11.72 11.25   K7e 151 0
106 HD 286179 TT* 04 57 00.6446112545 +15 17 52.998160033   10.99 10.39     G3V: 35 0
107 HD 286178 TT* 04 57 17.6843322925 +15 25 09.337576443   11.44 10.54     K1 30 1
108 V* V1207 Tau TT* 04 58 39.7399546095 +20 46 44.000674846   13.15       K7 29 0
109 V* V836 Tau TT* 05 03 06.5988350466 +25 23 19.604482133   15.00 13.49 13.48   K7/M0Ve 204 0
110 V* RW Aur TT* 05 07 49.5662483 +30 24 05.177426   10.86 9.60 9.95   K1/5e+K5e 708 0
111 NAME Orion Nebula Cluster OpC 05 35.0 -05 29           ~ 1977 1
112 * sig Ori Y*O 05 38 44.7665260139 -02 36 00.284709290 2.54 3.58 3.79 3.87 4.11 O9.5V 738 0
113 IC 2391 OpC 08 40 32 -53 02.0           ~ 714 0
114 IC 2602 OpC 10 42 58 -64 24.0           ~ 549 0
115 NAME Upper Sco Association As* 16 12 -23.4           ~ 1021 1

    Equat.    Gal    SGal    Ecl

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2020.07.13-00:40:13

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