1997A&A...320..185W


Query : 1997A&A...320..185W

1997A&A...320..185W - Astronomy and Astrophysics, volume 320, 185-195 (1997/4-1)

The T Tauri star population in the Lupus star forming region.

WICHMANN R., KRAUTTER J., COVINO E., ALCALA J.M., NEUHAEUSER R. and SCHMITT J.H.M.M.

Abstract (from CDS):

In a recent study, some 130 new weak-line T Tauri stars (WTTS) have been discovered in the Lupus star forming region (SFR). Some of these stars are seen projected onto regions of high obscuration, while others are located far from the Lupus dark clouds. In this paper we present photometric observations of a large sample of these WTTS. We estimate effective temperatures and luminosities for the stars observed, and derive masses and ages by comparison with theoretical evolutionary tracks. The mean age of WTTS seen in projection against the dark clouds is found to be lower than the mean age of WTTS discovered far from regions of high obscuration, and yet higher than the mean age of the classical T Tauri stars (CTTS) in Lupus. Moreover, while the CTTS in Lupus show an unusual predominance of very low-mass stars, the WTTS population in Lupus contains many stars with comparatively higher masses. Correlations between the X-ray emission and other stellar parameters, like bolometric luminosity, radius, mass, and age, are studied, and the results are discussed.

Abstract Copyright:

Journal keyword(s): stars: formation - stars: late-type - stars: pre-main sequence - X-rays: stars

VizieR on-line data: <Available at CDS (J/A+A/320/185): table6 table7>

Simbad objects: 96

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Number of rows : 96
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 NAME Tau-Aur Complex SFR 04 30 +25.0           ~ 1294 0
2 NAME Chamaeleon Region SFR 11 55 -78.0           ~ 739 0
3 UCAC2 13373557 Y*O 15 05 56.8547654208 -43 12 03.140312868 15.18 14.138 12.782 12.170 10.95 K7 14 0
4 2MASS J15065438-3713597 TT* 15 06 54.3914197248 -37 13 59.788510068     13.38     K0 7 0
5 CD-34 10180 TT* 15 07 14.8172880480 -35 04 59.527866036 11.84 11.37 10.662 10.02 9.631 K0IVe 31 0
6 V* LO Lup TT* 15 07 37.7410383240 -46 03 15.629428080 13.21 13.03 11.81 11.07 10.52 K2 17 0
7 V* LP Lup TT* 15 07 54.4967018976 -45 15 21.228736104   11.50 10.82     G3 13 0
8 V* LQ Lup TT* 15 08 37.7353724976 -44 23 17.049423444 11.46 11.54 10.645 10.22 9.804 G8IVe 78 0
9 HD 133938 TT* 15 08 38.5032196584 -44 00 51.979269132 11.26 11.17 10.54 9.97 9.56 G6V 28 0
10 RX J1511.0-3251 TT* 15 11 04.4987645496 -32 51 30.441746016 14.16 12.64 11.853 11.16 10.262 K6 18 0
11 2MASS J15113696-3550417 Y*O 15 11 36.9696483072 -35 50 41.756726184 14.60 13.69 12.59 11.91 11.21 K5 14 0
12 V* LR Lup TT* 15 13 57.2418005064 -46 29 06.086285988       13.72   M2 10 0
13 [KWS97] TTS 15 TT* 15 13 58.1714560488 -46 29 14.519169564   13.95 12.62 12.20   K7 9 0
14 HD 134974 TT* 15 14 07.5481895352 -41 03 36.301771080 11.03 10.93 10.415 10.02 9.655 G7V 27 0
15 HD 135127 Y*O 15 14 39.5851346520 -34 45 41.311354104 9.87 9.64 9.15 9.33 9.02 F5V 17 0
16 TYC 7830-1237-1 TT* 15 14 47.4804223896 -42 20 15.034384644   12.200 11.297 11.084   K1IV 19 0
17 2MASS J15150933-4438362 TT* 15 15 09.3323352288 -44 38 36.239194860     13.64     M0 8 0
18 V* LT Lup TT* 15 15 45.3719328096 -33 31 59.725104132 12.00 11.61 10.670 10.17 9.574 K0e 28 0
19 V* LS Lup TT* 15 15 52.7358985272 -44 18 17.322746652 14.64 13.79 12.49 12.15 11.215 K1 20 0
20 RX J1516.6-4406 Y*O 15 16 36.6331432464 -44 07 20.470013040 13.72 12.97 11.97 11.60 10.73 K2 12 0
21 V* LU Lup TT* 15 17 48.7409053848 -37 06 55.614721752   15.6 13.91     K7-M0 7 0
22 V* LV Lup TT* 15 17 49.1404766856 -37 06 54.846828180   16.2 14.82     M1.5 6 0
23 V* LW Lup TT* 15 18 26.9192118480 -37 38 02.070123108 12.23 11.79 10.891 10.41 9.850 K0IVe 35 0
24 V* LX Lup TT* 15 18 52.8186606144 -40 50 52.762169616 12.40 11.92 11.01 10.48 9.97 G8 20 0
25 V* LY Lup TT* 15 19 16.0028202264 -40 56 07.575850608   12.23 11.404   10.187 K0e 23 0
26 V* LZ Lup TT* 15 22 11.6170509720 -39 59 50.984522592 13.86 13.10 12.05 11.79 10.787 K3 18 0
27 V* MM Lup TT* 15 23 25.5768349080 -40 55 46.773915996 13.60 13.11 12.07 11.62 10.71 K2 16 0
28 V* MN Lup TT* 15 23 30.3994838448 -38 21 28.841024628     14.15     M0 24 0
29 V* MO Lup TT* 15 24 03.0436300056 -32 09 50.886751824 14.69 13.60 12.35 12.13 10.614 K4+M4 18 0
30 V* MP Lup TT* 15 24 32.3572754448 -36 52 02.770376232 12.69 11.96 11.231 10.78 10.184 K0V(e) 27 0
31 CD-35 10273 TT* 15 25 03.5661976248 -36 04 45.523059564 12.43 11.80 10.744 10.35 9.643 K1IV(e) 15 0
32 HD 137059 TT* 15 25 16.971744 -38 45 26.44020 9.56 10.13 9.50 9.32 7.99 G3V 23 0
33 V* MQ Lup TT* 15 25 33.1689637848 -36 13 46.761718260 13.17 12.71 11.68 11.56 10.468 K2 18 0
34 V* MR Lup TT* 15 25 36.6668495304 -35 37 31.934567280 14.61 13.68 12.492 11.64 10.817 K6 17 0
35 V* MS Lup TT* 15 25 59.6471855904 -45 01 15.821666004 11.97 11.67 10.969 10.42 10.041 G7IV 29 0
36 RX J1526.8-3722 TT* 15 26 52.5778834824 -37 22 06.218790852 15.47 14.42 13.156 12.13 11.215 M0.5 12 0
37 RX J1529.3-3737 ** 15 29 18.994104 -37 37 20.43228 16.28 15.17 13.66 13.14 11.280 M3 10 0
38 2MASS J15325722-3930439 Y*O 15 32 57.226 -39 30 44.02 15.93 14.61 13.10 12.14 11.12 M1 5 0
39 CD-38 10460 TT* 15 34 07.3613530248 -39 16 17.212150200 12.01 11.58 10.546 10.30 9.211 K1(e) 16 0
40 RX J1534.6-4002 TT* 15 34 38.1609174096 -40 02 28.083175800   12.59 11.37   10.555 K5Ve 17 0
41 V* MT Lup TT* 15 38 02.6519492760 -38 07 23.078501688     12.32 12.10 11.013 K5 18 0
42 RX J1538.6-3916 Y*O 15 38 38.2727853302 -39 16 55.360317479   12.64 11.61 11.21   K4 17 0
43 CD-43 10072 Y*O 15 38 43.0706398200 -44 11 47.418986976   11.03 10.28   9.512 G6IV(e) 25 0
44 V* MU Lup TT* 15 40 41.1704779152 -37 56 18.539934828     12.35     K6 18 0
45 2MASS J15430624-3920194 TT* 15 43 06.2455060656 -39 20 19.483625508     12.25     K6 13 0
46 CD-41 10274 TT* 15 45 52.2379435876 -42 22 16.440808058   11.50 10.50   9.438 K3IVe 20 0
47 CD-35 10498 TT* 15 46 41.2077442728 -36 18 47.458696608 12.21 12.24 11.21 10.00 9.44 K1e 21 0
48 CD-39 10162 TT* 15 47 41.7650471808 -40 18 26.748166644 12.58 12.33 11.158 10.75 10.047 K1e 26 0
49 2MASS J15480212-4004277 Y*O 15 48 02.1266021375 -40 04 27.480321789 12.64 12.03 11.08 10.53 10.03 K7-M0 7 0
50 RX J1548.1-3452 TT* 15 48 08.9376681792 -34 52 53.272833384     13.83     M2.5 10 0
51 HD 141277 TT* 15 49 44.9775230 -39 25 09.113328   11.40 10.640   9.523 K1IV(e) 28 0
52 V* MV Lup TT* 15 49 59.2107255432 -36 29 57.438440124 11.98 12.59 11.28 10.02 9.52 K2 23 0
53 2MASS J15504672-3829267 TT* 15 50 46.7203448976 -38 29 26.811903228     13.44     K7 8 0
54 RX J1550.8-3830 X 15 50 46.8 -38 30 09           ~ 2 0
55 V* MW Lup TT* 15 52 19.5216794160 -38 19 31.379604564 15.80 14.46 13.19 12.43 11.55 K7 14 0
56 2MASS J15545286-3827566 TT* 15 54 52.8577997616 -38 27 56.611074456     13.43     K7 9 0
57 2MASS J15552621-3338232 Y*O 15 55 26.2194715296 -33 38 23.285843664 14.51 13.58 12.45 11.74 11.05 K5 16 0
58 V* MX Lup TT* 15 55 33.7961993688 -37 09 41.057963532 14.77 13.75 12.52 11.77 11.04 K6 13 0
59 WRAY 15-1384 TT* 15 56 02.0994258408 -36 55 28.274506140 14.91 15.05 13.85 12.91 11.86 M1 34 0
60 2MASS J15585980-3646206 TT* 15 58 59.8009052088 -36 46 21.044992260     13.57     M1.5 11 0
61 2MASS J15591617-3814413 TT* 15 59 16.1730055800 -38 14 41.351258724     13.62     M1.5 7 0
62 CD-36 10569 TT* 15 59 49.5108561504 -36 28 27.904409112 13.01 12.06 11.12 10.32 9.66 K3e 33 0
63 2MASS J15595416-3750469 Y*O 15 59 54.1703793240 -37 50 46.955070960 15.84 14.60 13.03 12.23 10.97 M0.5 9 0
64 V* MZ Lup TT* 16 01 08.9697543744 -33 20 14.177235192 12.11 11.88 10.88 10.35 9.812 G5IVe 28 0
65 V* NN Lup TT* 16 01 59.1820440840 -36 12 55.584740952 13.75 12.99 13.10 11.29 10.381 K3 24 0
66 NAME Lupus Complex SFR 16 03 -38.1           ~ 604 0
67 V* NO Lup TT* 16 03 11.8111062336 -32 39 20.284463916 15.13 14.25 12.864 12.14 11.149 K7 23 0
68 HD 143677 TT* 16 03 45.3645926 -43 55 49.198300 11.09 10.57 9.681 9.14 8.664 K0IV 42 1
69 CD-39 10292 TT* 16 03 52.5008065896 -39 39 01.266425244 12.83 12.00 11.01 10.38 9.79 K3V 26 0
70 CD-31 12522 TT* 16 04 30.5576942544 -32 07 28.675218612 12.19 11.61 10.76 10.36 9.84 K2e 22 0
71 HD 143978 PM* 16 04 57.0731670000 -38 57 15.710985792 9.75 9.70 9.199 8.97 8.534 G0V 25 0
72 2MASS J16053099-3845164 TT* 16 05 30.9888640176 -38 45 16.463971044     13.78     K2 6 0
73 V* NP Lup TT* 16 05 33.2943805416 -38 37 45.214988592     14.38     M1 13 0
74 CD-38 10866 TT* 16 05 45.0016393344 -39 06 06.533278704 11.60 11.41 10.584 10.02 9.645 K0Ve 24 0
75 RX J1607.2-3839 Y*O 16 07 13.6947058536 -38 39 23.892759648 15.22 14.11 12.76 11.87 10.95 K7 14 0
76 RX J1608.0-3857 TT* 16 07 59.9466882120 -38 57 51.446386872 15.16 14.28 12.83 12.50 10.819 ~ 14 0
77 2MASS J16081096-3910459 TT* 16 08 10.9590962904 -39 10 45.934592664 15.15 14.08 12.84 12.06 11.38 ~ 13 0
78 V* NQ Lup TT* 16 08 18.1987920557 -38 44 05.706934083 14.54 13.518 12.243 11.930 10.60 ~ 16 0
79 2MASS J16082279-3900591 TT* 16 08 22.7935199352 -39 00 59.059019664     15.05 15.02 12.75 ~ 13 0
80 V* V1093 Sco TT* 16 08 27.7818643128 -39 00 40.623399936     14.57 13.54 12.20 ~ 14 0
81 2MASS J16083156-3847292 TT* 16 08 31.5456553776 -38 47 29.164332012     13.72 12.65 11.28 ~ 16 0
82 V* V1094 Sco TT* 16 08 36.1772010696 -39 23 02.464980972 16.01 15.00 13.48 12.47 11.45 ~ 63 1
83 RX J1608.9-3905 TT* 16 08 54.2744987760 -39 06 05.799061764 12.57 11.91 10.88 10.28 9.74 ~ 22 0
84 2MASS J16085429-3946046 Y*O 16 08 54.2933210976 -39 46 04.648846584 18.68 18.68 15.33 14.26 12.57 M3.5 9 0
85 2MASS J16092320-3855547 TT* 16 09 23.1946497840 -38 55 54.588719532     14.42 13.41 11.86 ~ 10 0
86 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
87 V* V1095 Sco TT* 16 09 39.5245401360 -38 55 07.090892580   12.94 11.524 10.77 9.924 ~ 18 0
88 RX J1609.9-3923 TT* 16 09 53.986176 -39 23 27.78720   15.76 14.14 13.93 11.77 ~ 12 0
89 V* V1096 Sco TT* 16 10 04.7938071672 -40 16 12.286370424 12.76 12.10 11.284 10.64 10.098 K2e 22 0
90 2MASS J16113801-3841356 TT* 16 11 38.0194605120 -38 41 35.679110172 17.05 15.31 13.40 12.28 11.22 ~ 12 0
91 RX J1612.0-3840 Or* 16 12 01.4080284805 -38 40 27.672302829 14.12 12.99 11.999 10.87 10.285 ~ 14 0
92 V* V1097 Sco TT* 16 13 02.4148850592 -40 04 32.961135720 16.48 15.10 13.49 12.51 11.39 K7 13 0
93 RX J1613.9-3912 TT* 16 13 57.8346257184 -39 13 44.887715508     15.43 16.01 14.19 M4 3 0
94 WRAY 15-1443 TT* 16 15 20.2341630672 -32 55 05.097631872 13.88 13.22 12.00 11.21 10.50 K5 77 0
95 HD 147048 TT* 16 21 12.1943779488 -40 30 20.599834284 11.64 11.45 10.482 9.96 9.524 G9IV 19 0
96 HD 147402 TT* 16 23 29.5554512712 -39 58 00.847339680 11.63 11.42 10.64 10.40 10.03 G3IV 23 0

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2022.05.20-19:51:05

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