2007A&A...473L..21B


C.D.S. - SIMBAD4 rel 1.7 - 2020.10.25CET10:05:13

2007A&A...473L..21B - Astronomy and Astrophysics, volume 473, L21-24 (2007/10-3)

The evolution of stars in the Taurus-Auriga T association.

BERTOUT C., SIESS L. and CABRIT S.

Abstract (from CDS):

In a recent study, individual parallaxes were determined for many stars of the Taurus-Auriga T association that are members of the same moving group. We use these new parallaxes to re-address the issue of the relationship between classical T Tauri stars (CTTSs) and weak-emission line T Tauri stars (WTTSs). With the available spectroscopic and photometric information for 72 individual stars or stellar systems among the Taurus-Auriga objects with known parallaxes, we derived reliable photospheric luminosities, mainly from the Ic magnitude of these objects. We then studied the mass and age distributions of the stellar sample, using pre-main sequence evolutionary models to determine the basic properties of the stellar sample. Statistical tests and Monte Carlo simulations were then applied to studying the properties of the two T Tauri subclasses. We find that the probability of CTTS and WTTS samples being drawn from the same parental age and mass distributions is low; CTTSs are, on average, younger than WTTSs. They are also less massive, but this is due to selection effects. The observed mass and age distributions of both T Tauri subclasses can be understood in the framework of a simple disk evolution model, assuming that the CTTSs evolve into WTTSs when their disks are fully accreted by the stars. According to this empirical model, the average disk lifetime in Taurus-Auriga is 4x106(M*/M)0.75yr.

Abstract Copyright:

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

Simbad objects: 73

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Number of rows : 73

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 2MASS J03542950+3203013 TT* 03 54 29.5045697196 +32 03 01.407089906   12.71 11.85     G0 48 0
2 2MASS J03543017+3203043 TT* 03 54 30.17472 +32 03 04.3488   13.25 12.31     G5 50 0
3 2MASS J04035084+2610531 TT* 04 03 50.8393021714 +26 10 53.015575434   15.57 14.17     M2.8 52 0
4 BD+21 584 TT* 04 04 28.4881972312 +21 56 04.542823294   10.04 9.58 9.56   F8 40 0
5 V* V1299 Tau Ir* 04 05 40.5863049882 +22 48 11.824767557   9.99 9.39     G3V: 48 0
6 HD 284149 TT* 04 06 38.7980686799 +20 18 11.150823396   10.21 9.63     F8 43 0
7 HD 283447 Or* 04 14 12.9232870093 +28 12 12.378540314 13.17 12.07 10.68 9.45 8.67 K3Ve 383 0
8 V* CW Tau Or* 04 14 17.0041128798 +28 10 57.765657757 13.92 13.64 12.36 12.86   K0Ve 318 0
9 V* FP Tau Or* 04 14 47.3027404423 +26 46 26.414740336 17.21 16.14 15.02     M4Ve 142 0
10 V* CX Tau Or* 04 14 47.8612023028 +26 48 11.013547235 16.48 15.93 14.50     M1.5Ve 152 0
11 EM* LkCa 4 Or* 04 16 28.1070192558 +28 07 35.732032828   13.96   11.825   K7:Ve 144 0
12 V* CY Tau Or* 04 17 33.7281514373 +28 20 46.809969664 14.52 14.68 13.40 12.59   M1.5 232 0
13 V* V1312 Tau TT* 04 17 38.9462203679 +28 33 00.570855332   15.57 13.26 13.12   M2 88 0
14 2MASS J04182147+1658470 TT* 04 18 21.4747288784 +16 58 46.997648983   14.37 13.26     K5 49 0
15 V* V410 Tau Or* 04 18 31.1083261392 +28 27 16.155411536   12.13 10.75 8.45 9.408 K3Ve 426 0
16 V* DD Tau Or* 04 18 31.1271804823 +28 16 29.158626278 15.94 15.49 14.10 13.76   M3.5e+M3.5e 179 0
17 V* CZ Tau Or* 04 18 31.5906879009 +28 16 58.161795569 15.96 16.60 15.70 14.77   M2 129 0
18 V* V1023 Tau Or* 04 18 47.0296109602 +28 20 07.490327496   14.31 12.00 11.21   K7 144 0
19 V* V1069 Tau Or* 04 18 51.7034617249 +17 23 16.579842927   13.32 12.22 12.22 10.944 K7e 102 0
20 V* BP Tau Or* 04 19 15.8342975037 +29 06 26.929456808   13.13 12.12 11.89   K5/7Ve 604 0
21 WK81 1 TT* 04 19 26.2671630797 +28 26 14.259129093   14.81   12.240   K7 193 1
22 V* V1070 Tau Or* 04 19 41.2688488305 +27 49 48.151086734   13.75 12.25 11.14   M0 134 0
23 V* RY Tau Or* 04 21 57.4132838427 +28 26 35.533990877 10.82 10.34 9.30 9.67 8.87 K1IV/Ve 653 1
24 HD 283572 Or* 04 21 58.8482823933 +28 18 06.511915195   9.80 9.03 9.14   G5IVe 269 0
25 HD 285751 TT* 04 23 41.3219281196 +15 37 54.899767190   12.42 11.56     K2V: 41 0
26 V* IP Tau Or* 04 24 57.0823478325 +27 11 56.543062579   14.50   12.46   M0:Ve 192 0
27 V* DF Tau B * 04 27 02.79 +25 42 22.4     13.51     M3.5e 19 0
28 V* DF Tau A * 04 27 02.79 +25 42 22.4     12.62     M2e 28 0
29 HD 285778 Or* 04 27 10.5694001840 +17 50 42.660851333   11.07 10.22     K1e 124 0
30 LDN 1521D DNe 04 27 46.5 +26 18 52           ~ 215 0
31 V* DI Tau Or* 04 29 42.4736177473 +26 32 49.119618729 16.39 15.20 13.60     M0Ve 195 0
32 V* IQ Tau Or* 04 29 51.5569553814 +26 06 44.854858369 15.43   13.80 12.28 11.11 M0.5 200 0
33 V* UX Tau B TT* 04 30 03.5778750604 +18 13 49.477040697       13.33   M1Ve 62 0
34 V* UX Tau A TT* 04 30 03.9931880444 +18 13 49.476948664   12.92 11.15     K2Ve 328 0
35 V* UX Tau Or* 04 30 03.99626 +18 13 49.4355 11.23 11.84 10.80 9.83 9.05 K2Ve+M1Ve 316 0
36 V* FX Tau Or* 04 30 29.618064 +24 26 45.02724   15.18 13.61 13.21   M4 143 0
37 V* DK Tau A * 04 30 44.2409691803 +26 01 24.730398215           K5Ve 248 0
38 V* DK Tau Or* 04 30 44.243376 +26 01 24.65328 13.32 14.59 13.05 12.08   K7e+K7e 298 0
39 EM* LkHA 331 TT* 04 31 23.814648 +24 10 52.98312   16.30 14.73 14.98   M4.5V 96 0
40 HBC 392 Or* 04 31 27.1756563044 +17 06 24.745482804   13.71       K5e 70 0
41 V* HK Tau Or* 04 31 50.5722969258 +24 24 17.775488652 16.81   15.10     M0.5 296 1
42 L 1551-51 Or* 04 32 09.2838548075 +17 57 22.695083303   13.29       K7e 118 0
43 V* V827 Tau TT* 04 32 14.5731257511 +18 20 14.719337994   14.00 12.63 12.35   K7Ve 158 0
44 V* V826 Tau TT* 04 32 15.8394065935 +18 01 38.751126168   13.51 12.074   10.312 K7.0 165 0
45 V* V928 Tau Or* 04 32 18.8839760967 +24 22 26.713747659 17.65   13.7     M0.5 81 0
46 V* GG Tau Or* 04 32 30.3318954228 +17 31 40.834888327 14.84 14.78 13.40 11.54   M0e+M2.0e 653 1
47 NAME TAU-AUR T ASSOC Cl* 04 32 33 +26 04.6           ~ 44 0
48 V* V1321 Tau TT* 04 32 53.2359649386 +17 35 33.645694399     13.69     M2 42 0
49 V* GH Tau Or* 04 33 06.2181025969 +24 09 33.628411049     13.20 12.59   M3Ve 169 0
50 V* DM Tau Or* 04 33 48.7335659850 +18 10 09.974471722 14.30 14.82 14.00     M2Ve 518 0
51 V* CI Tau Or* 04 33 52.0144455735 +22 50 30.093741884 14.97 15.09 13.80     K4IVe 270 1
52 V* V1077 Tau Or* 04 34 18.0134345949 +18 30 06.335688396   13.70       G8 74 0
53 HD 285898 Or* 04 35 14.1984242134 +18 21 35.579726828   11.69 11.39     G0 29 0
54 V* DN Tau Or* 04 35 27.3776240781 +24 14 58.908761629 13.56 12.88 11.50 11.79   M1:Ve 350 0
55 V* V1115 Tau TT* 04 36 19.1014976181 +25 42 58.999936422   12.97 11.76 10.81 10.228 M0 76 0
56 V* DO Tau Or* 04 38 28.5882167490 +26 10 49.472067634 12.78 13.44 12.30 13.01   M1Ve 319 1
57 V* HV Tau Or* 04 38 35.2903493114 +26 10 38.646251388           M1Ve 116 0
58 V* VY Tau Or* 04 39 17.4208176970 +22 47 53.361809753     9.00     M0Ve 180 0
59 EM* LkCa 15 Or* 04 39 17.7912813350 +22 21 03.387667491   13.01 12.03 11.61   K5:Ve 560 1
60 V* IW Tau Or* 04 41 04.7179844751 +24 51 06.034940625   14.25 12.595 11.65 10.504 K7Ve 106 0
61 V* V999 Tau Or* 04 42 05.4896906880 +25 22 56.226737601 18.68 15.1 14.7     M0.6 74 0
62 V* GO Tau Or* 04 43 03.0761884276 +25 20 18.708294279   16.2 14.40     M2.3 154 0
63 V* DR Tau Or* 04 47 06.2152696011 +16 58 42.814250257 12.03 11.86 10.50 12.19   K5Ve 472 0
64 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 329 0
65 V* V1346 Tau TT* 04 52 30.7532819051 +17 30 25.723747453     12.02     K4 28 0
66 V* GM Aur Or* 04 55 10.9813656049 +30 21 59.375978047 14.59 14.22 13.10     K3Ve 556 0
67 HD 282630 Or* 04 55 36.9698052301 +30 17 55.100440086   12.17 11.12 10.55   K0Ve 151 0
68 V* AB Aur Ae* 04 55 45.8459978418 +30 33 04.293281305 7.20 7.16 7.05 6.96 6.70 A0Ve 939 2
69 V* SU Aur Or* 04 55 59.3861369488 +30 34 01.499800471   10.33 9.30 9.17   G2IIIne 538 0
70 V* V397 Aur Or* 04 56 02.0261376554 +30 21 03.635056925   13.07 11.72 11.25   K7e 151 0
71 HD 286179 TT* 04 57 00.6446112545 +15 17 52.998160033   10.99 10.39     G3V: 35 0
72 V* V1354 Tau TT* 04 57 30.6553358064 +20 14 29.583789014   11.94 11.09 10.85 9.938 K1 28 0
73 V* RW Aur TT* 05 07 49.5662483 +30 24 05.177426   10.86 9.60 9.95   K1/5e+K5e 717 0

    Equat.    Gal    SGal    Ecl

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2020.10.25-10:05:13

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