2015A&A...580A..26G


C.D.S. - SIMBAD4 rel 1.7 - 2021.02.24CET23:01:02

2015A&A...580A..26G - Astronomy and Astrophysics, volume 580A, 26-26 (2015/8-1)

Evolution of the T Tauri star population in the Lupus association.

GALLI P.A.B., BERTOUT C., TEIXEIRA R. and DUCOURANT C.

Abstract (from CDS):

In a recent study, we derived individual distances for 109 pre-main sequence stars that define the Lupus kinematic association of young stars. Here, we use these new distances to derive the masses and ages of Lupus T Tauri stars with the aim of better constraining the lifetime of their circumstellar disks. Using the photometric and spectroscopic information available in the literature, we computed the photospheric luminosity of 92 T Tauri stars in the Lupus association. Then, we estimated their masses and ages from theoretical evolutionary models. Based on Monte Carlo simulations and statistical tests, we compare the mass and age distribution of the classical T Tauri stars (CTTS) and weak-line T Tauri (WTTS) in our sample. We show that the CTTSs are on average younger than the WTTSs and that the probability that both T Tauri subclasses are drawn from the same mass and age parental distribution is very low. Our results favor the scenario proposed earlier for the Taurus-Auriga association, where the CTTSs evolve into WTTSs when their disks are fully accreted by the star. Based on an empirical disk model, we find that the average disk lifetime for the T Tauri stars in the Lupus association is τd=3x106(M*/M)0.55yr. We find evidence that the average lifetime of the circumstellar disks in the Lupus association is shorter than in the Taurus-Auriga association and discuss the implications of this result.

Abstract Copyright:

Journal keyword(s): stars: pre-main sequence - circumstellar matter - stars: formation

VizieR on-line data: <Available at CDS (J/A+A/580/A26): table1.dat>

CDS comments: Table 1 F304 is [HHC93] F304 in SIMBAD.

Simbad objects: 104

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Number of rows : 104

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 V* DI Tau Or* 04 29 42.4736177473 +26 32 49.119618729 16.39 15.20 13.60     M0Ve 198 0
2 NAME Tau-Aur Complex SFR 04 30 +25.0           ~ 1245 0
3 V* DM Tau Or* 04 33 48.7335659850 +18 10 09.974471722 14.30 14.82 14.00     M2Ve 532 0
4 EM* LkCa 15 Or* 04 39 17.7912813350 +22 21 03.387667491   13.01 12.03 11.61   K5:Ve 579 1
5 NAME Taurus Complex SFR 04 41.0 +25 52           ~ 3637 0
6 V* GM Aur Or* 04 55 10.9813656049 +30 21 59.375978047 14.59 14.22 13.10     K3Ve 565 0
7 NGC 2264 OpC 06 40 58 +09 53.7           ~ 1613 0
8 RX J1508.8-3715 Y*O 15 08 53.7977273044 -37 15 46.901624462   13.13 11.99 11.88   K5 11 0
9 TYC 7316-564-1 Ro* 15 11 04.4988329026 -32 51 30.440645144 14.16 12.64 11.853 11.16 10.262 K6 17 0
10 2MASS J15113696-3550417 Y*O 15 11 36.9617668893 -35 50 41.815121538 14.60 13.69 12.59 11.91 11.21 K5 14 0
11 UCAC2 17286988 * 15 12 39.8104274334 -34 16 59.213257873     13.75     K5 5 0
12 HD 135127 Y*O 15 14 39.5851698718 -34 45 41.313460504 9.87 9.64 9.15 9.33 9.02 F5V 17 0
13 V* LT Lup TT* 15 15 45.3719396003 -33 31 59.723100575 12.00 11.61 10.670 10.17 9.574 K0e 26 0
14 V* LW Lup TT* 15 18 26.9187790566 -37 38 02.073846961 12.23 11.79 10.891 10.41 9.850 K0IVe 35 0
15 V* MP Lup TT* 15 24 32.3572526918 -36 52 02.768065093 12.69 11.96 11.231 10.78 10.184 K0V(e) 27 0
16 CD-35 10273 TT* 15 25 03.5570687332 -36 04 45.550531552 12.43 11.80 10.744 10.35 9.643 K1IV(e) 14 0
17 V* MQ Lup TT* 15 25 33.1685259585 -36 13 46.776203522 13.17 12.71 11.68 11.56 10.468 K2 18 0
18 V* MR Lup TT* 15 25 36.6659587499 -35 37 31.942043562 14.61 13.68 12.492 11.64 10.817 K6 17 0
19 2MASS J15272286-3604087 TT* 15 27 22.8334424131 -36 04 09.414019920     13.0     K7-M0 8 0
20 RX J1529.3-3737 Ro* 15 29 18.994104 -37 37 20.43228 16.28 15.17 13.66 13.14 11.280 M3 10 0
21 CD-36 10208 TT* 15 29 47.2647575143 -36 28 37.407552322   12.60 11.16   10.644 K2IVe 19 0
22 CD-33 10568 TT* 15 31 21.9300281535 -33 29 39.448548443   11.56 10.834   9.860 G9IV 24 0
23 2MASS J15343816-4002280 TT* 15 34 38.1607747483 -40 02 28.083798707   12.59 11.37   10.555 K5Ve 16 0
24 Sz 65 Or* 15 39 27.7717320499 -34 46 17.209059896   13.11 12.13 11.33 10.76 K7 75 0
25 RX J1539.7-3450 TT* 15 39 46.372800 -34 51 02.53332 11.77 13.58 12.35 12.08 10.688 ~ 13 0
26 2MASS J15401371-3401429 Y*? 15 40 13.7151079482 -34 01 42.977404924       13.81 12.21 K5III 5 0
27 [KWS97] RX J1540.3-3426A TT* 15 40 18.4525564428 -34 26 15.381032499   16.45 14.82 15.02 12.42 ~ 9 0
28 V* MU Lup TT* 15 40 41.1703115673 -37 56 18.539632353     12.35     K6 16 0
29 2MASS J15414827-3501458 Y*? 15 41 48.2829330988 -35 01 45.835946159       14.34 12.60 ~ 4 0
30 2MASS J15420518-3601317 Y*O 15 42 05.1862787872 -36 01 31.813792627 14.59 13.54 12.35 11.61 10.93 K7 8 0
31 NAME Lupus I Cld 15 43 02.1 -34 09 06           ~ 235 0
32 CD-32 11039 TT* 15 44 03.7662800422 -33 11 11.188580648   11.71 10.87     K0IVe 26 0
33 2MASS J15443529-3521492 TT* 15 44 35.2921664758 -35 21 49.420924239     12.296   10.637 K5 7 0
34 CD-35 10498 TT* 15 46 41.2046924136 -36 18 47.437909861 12.21 12.24 11.21 10.00 9.44 K1e 20 0
35 RX J1546.7-3459 TT* 15 46 45.0644520747 -34 59 47.434115270           M0 6 0
36 2MASS J15470841-3540195 TT* 15 47 08.4230851883 -35 40 19.655613133     13.3     K5 5 0
37 CD-39 10162 TT* 15 47 41.7650421526 -40 18 26.747553263 12.58 12.33 11.158 10.75 10.047 K1e 26 0
38 V* HM Lup Or* 15 47 50.6290613485 -35 28 35.404500425   15.96       M3e 64 0
39 THA 15-5 TT* 15 47 56.9433443193 -35 14 34.797849332   14.5 16.2     K7e 67 0
40 V* HN Lup Or* 15 48 05.2154956876 -35 15 53.295162846           M3.5e 50 0
41 RX J1548.1-3452 TT* 15 48 08.9385254950 -34 52 53.276903476     13.83     M2.5 10 0
42 RX J1548.9-3513 TT* 15 48 54.1264150841 -35 13 18.675380913     13.9     K6 7 0
43 CD-35 10525 Or* 15 49 12.1055573607 -35 39 05.053991067 12.19 12.76 11.66 11.15   K7Ve 252 0
44 Sz 76 TT* 15 49 30.7354526514 -35 49 51.418314548   14.4       M3.2 37 0
45 HD 141277 TT* 15 49 44.9775230 -39 25 09.113328   11.40 10.640   9.523 K1IV(e) 26 0
46 V* MV Lup TT* 15 49 59.2106933624 -36 29 57.437490692 11.98 12.59 11.28 10.02 9.52 K2 22 0
47 2MASS J15504672-3829267 TT* 15 50 46.7204786110 -38 29 26.811814435     13.44     K7 8 0
48 Sz 77 TT* 15 51 46.9579216483 -35 56 44.112995611   12.0       K5.5 55 0
49 V* MW Lup TT* 15 52 19.5215263905 -38 19 31.378777561 15.80 14.46 13.19 12.43 11.55 K7 13 0
50 2MASS J15552621-3338232 Y*O 15 55 26.2193633749 -33 38 23.283599713 14.51 13.58 12.45 11.74 11.05 K5 15 0
51 WRAY 15-1384 TT* 15 56 02.0991789524 -36 55 28.274442471 14.91 15.05 13.85 12.91 11.86 M1 32 0
52 THA 15-12 Or* 15 56 09.2067120748 -37 56 06.126159332   13.12 11.93 11.45   M0e 275 0
53 WRAY 15-1388 TT* 15 57 24.0104476686 -42 40 04.569519550   13.0 13.80     K7/M0 18 0
54 Sz 128 TT* 15 58 07.324 -41 51 47.96   13.5       M1 17 0
55 2MASS J15585980-3646206 TT* 15 58 59.7980965527 -36 46 21.032970124     13.57     M1.5 11 0
56 CD-36 10569 TT* 15 59 49.5107000592 -36 28 27.903949258 13.01 12.06 11.12 10.32 9.66 K3e 28 0
57 2MASS J15595416-3750469 Y*O 15 59 54.1660060351 -37 50 46.950836991 15.84 14.60 13.03 12.23 10.97 M0.5 9 0
58 2MASS J16000060-4221567 Y*O 16 00 00.6025556933 -42 21 56.821022044   17.29 15.85 15.25 13.43 M4.5 25 0
59 Sz 131 Y*O 16 00 49.4334861658 -41 30 03.918935711   17.51 16.13 14.60 12.92 M2 29 0
60 V* NN Lup TT* 16 01 59.1820877482 -36 12 55.583519243 13.75 12.99 13.10 11.29 10.381 K3 23 0
61 NAME Lup Cloud SFR 16 03 -38.1           ~ 548 0
62 HD 325367 Or* 16 03 05.4914377137 -40 18 25.426543472   11.40 8.50     M0 292 0
63 CD-39 10292 TT* 16 03 52.4932393087 -39 39 01.287069408 12.83 12.00 11.01 10.38 9.79 K3V 25 0
64 HD 143978 Ro* 16 04 57.0732152496 -38 57 15.711620875 9.75 9.70 9.199 8.97 8.534 G0V 23 0
65 V* NP Lup TT* 16 05 33.2944633284 -38 37 45.218905924     14.38     M1 13 0
66 CD-38 10866 TT* 16 05 45.0013878730 -39 06 06.532261840 11.60 11.41 10.584 10.02 9.645 K0Ve 24 0
67 V* HO Lup Or* 16 07 00.603672 -39 02 19.49316   13.94 13.17 13.03   M1e 62 0
68 THA 15-21 TT* 16 07 10.0693512723 -39 11 03.258471635   15.28 13.70 13.70 12.49 K7-M0 55 0
69 THA 15-20 TT* 16 07 11.5876160594 -39 03 47.490881982   16.25 14.58 14.11 12.92 M0.5 79 0
70 RX J1607.2-3839 Y*O 16 07 13.6922068150 -38 39 23.879891793 15.22 14.11 12.76 11.87 10.95 K7 13 0
71 Sz 95 TT* 16 07 52.3113021630 -38 58 06.092190897   16.39 14.57 14.25 12.53 ~ 41 0
72 RX J1608.0-3857 TT* 16 07 59.971704 -38 57 51.00912 15.16 14.28 12.83 12.50 10.819 ~ 14 0
73 2MASS J16081096-3910459 TT* 16 08 10.9591406113 -39 10 45.934759073 15.15 14.08 12.84 12.06 11.38 ~ 13 0
74 Sz 96 TT* 16 08 12.6306575418 -39 08 33.469578208   14.80 13.43 13.69 11.84 ~ 66 0
75 V* NQ Lup TT* 16 08 18.1987920557 -38 44 05.706934083 14.54 13.51 12.23 11.43 10.60 ~ 16 0
76 THA 15-24 Y*O 16 08 21.8039413126 -39 04 21.489571046   16.18 14.61 14.67 12.92 M3 47 0
77 WRAY 16-203 Or* 16 08 29.7086692265 -39 03 10.994386198   16.26 15.91 15.38 15.69 K0: 154 1
78 2MASS J16083156-3847292 TT* 16 08 31.5408223857 -38 47 29.505952099     13.72 12.65 11.28 ~ 15 0
79 V* V1094 Sco TT* 16 08 36.1770068081 -39 23 02.462096497 16.01 15.00 13.48 12.47 11.45 ~ 56 1
80 2MASS J16085324-3914401 Y*O 16 08 53.2415720407 -39 14 40.165579947   17.53 16.35 15.35 13.52 M3 34 1
81 RX J1608.9-3905 TT* 16 08 54.2744387511 -39 06 05.800087001 12.57 11.91 10.88 10.28 9.74 ~ 21 0
82 2MASS J16085429-3946046 Y*O 16 08 54.2936015682 -39 46 04.651715501 18.68 18.68 15.33 14.26 12.57 M3.5 9 0
83 THA 15-33 TT* 16 08 54.6847312618 -39 37 43.145460615   15.34 13.98 13.29   M1IVe 66 0
84 Sz 112 Y*O 16 08 55.5292331003 -39 02 33.939799154   16.62 15.39 14.78 12.93 M6 56 0
85 THA 15-35 Or* 16 09 01.8488471357 -39 05 12.416220509   15.33 14.12 14.35 12.54 M5.5 74 0
86 Sz 115 TT* 16 09 06.2136491733 -39 08 51.871061306   16.88 15.48 15.09 13.12 ~ 40 0
87 WRAY 15-1423 Em* 16 09 12.2687523241 -41 40 24.974835513     12.5     Mpe 18 0
88 RX J1609.4-3850 TT* 16 09 27.395520 -38 50 19.02516 15.28 14.15 12.78 12.45 10.670 ~ 11 0
89 THA 15-36 TT* 16 09 42.565776 -39 19 41.09520   15.30 13.89 13.57 11.68 ~ 26 0
90 THA 15-37 Y*O 16 09 44.3608441562 -39 13 30.167268370   15.84 14.59 14.20 12.38 M2 49 0
91 Sz 118 Y*O 16 09 48.6557347813 -39 11 16.846032967   18.32 16.90 16.61 15.00 K6 49 0
92 RX J1609.9-3923 TT* 16 09 53.986176 -39 23 27.78720   15.76 14.14 13.93 11.77 ~ 12 0
93 THA 15-38 TT* 16 09 57.0785084971 -38 59 48.029265513   15.35 13.71 13.49 11.96 ~ 23 0
94 V* V1096 Sco TT* 16 10 04.7917487872 -40 16 12.275186339 12.76 12.10 11.284 10.64 10.098 K2e 22 0
95 THA 15-40 TT* 16 10 12.1994267530 -39 21 17.991359231   15.70 14.06 13.88 11.84 ~ 25 0
96 THA 15-41 TT* 16 10 16.4254785450 -39 08 05.033811326   15.33 13.73 13.28 12.12 M2 29 0
97 THA 15-42 Y*O 16 10 51.5851116158 -38 53 13.768173219   15.89 14.48 14.44 12.95 M1e 57 0
98 RX J1612.0-3840 Or* 16 12 01.4080284805 -38 40 27.672302829 14.12 12.99 11.999 10.87 10.285 ~ 13 0
99 2MASS J16120761-3813242 Y*? 16 12 07.6125602639 -38 13 24.388287715       14.42 12.72 M4.5 7 0
100 2MASS J16122204-4012522 TT* 16 12 22.0460288596 -40 12 52.162890275           M5 6 0
101 2MASS J16124373-3815031 Y*O 16 12 43.7500201062 -38 15 03.075872612   15.00 13.44 13.39 11.61 M1 29 0
102 V* V1097 Sco TT* 16 13 02.4158057797 -40 04 32.957991415 16.48 15.10 13.49 12.51 11.39 K7 12 0
103 2MASS J16142637-3807597 TT* 16 14 26.3562440386 -38 07 59.699784387     12.690   11.060 ~ 10 0
104 HD 147402 TT* 16 23 29.5560761508 -39 58 00.843049243 11.63 11.42 10.64 10.40 10.03 G3IV 23 0

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2021.02.24-23:01:02

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