1998A&A...338..442F

Query : 1998A&A...338..442F

1998A&A...338..442F - Astronomy and Astrophysics, volume 338, 442-451 (1998/10-2)

Kinematics of T Tauri stars in Chamaeleon.

FRINK S., ROESER S., ALCALA J.M., COVINO E. and BRANDNER W.

Abstract (from CDS):

We study the kinematics of T Tauri stars (TTS) located in the cores of the Chamaeleon clouds as well as far off these clouds. Our sample comprises 2 early type stars known to be related to Cha i, 6 classical (CTTS) and 6 weak-line T Tauri stars (WTTS) known before the ROSAT mission, and 8 bona-fide pre-main sequence (PMS) stars as well as 23 presumably older stars discovered with ROSAT (Alcala et al. 1995; Covino et al. 1997). Altogether we present proper motions for 45 stars, taken from the Hipparcos, ACT and STARNET catalogues. For 12 stars of our sample parallaxes measured by Hipparcos are available, and we use them to derive constraints on the distance distribution of the other stars in our sample. Our analysis of the proper motions allows us to divide the sample into several subgroups. We analyse the motions of the stars in connection with different star formation scenarios and find them consistent with both the high velocity cloud (HVC) impact model (Lepine & Duvert, 1994A&A...286...60L) and the cloudlet model (Feigelson, 1996ApJ...468..306F), whereas the data seem to be inconsistent with any kind of a dynamical ejection model.

Abstract Copyright: ∼

Journal keyword(s): stars: kinematics - stars: formation - stars: pre-main sequence - stars: late-type - astrometry

Simbad objects: 57

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Number of rows : 57
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024 		#notes
1 V* EG Cha Or* 08 36 56.2143359952 -78 56 45.633633000   11.82 10.457   9.010 K4Ve 98 0
2 CD-77 353 TT* 08 49 11.0947949808 -77 35 58.588129464   10.04 8.786   7.503 K1III 14 0
3 CD-75 392 TT* 08 50 05.4486135048 -75 54 38.082436848   11.305 10.604 10.493 9.728 G9V 39 0
4 CPD-82 291 TT* 08 53 05.3105538408 -82 43 59.791519848   12.52 11.50     K4 13 0
5 2MASS J09171033-7744019 TT* 09 17 10.3487931504 -77 44 02.142022020   11.34 10.50 10.64   G2 14 0
6 HD 81485A TT* 09 19 24.6525107640 -77 38 36.351469968   9.02 8.33     G7V 30 0
7 HD 81485 ** 09 19 24.66139 -77 38 36.3382           G7V+K0IVe 45 0
8 HD 82859 * 09 28 15.0117816456 -78 15 22.365108432   9.03 8.64     F3/5V 12 0
9 HD 82879 TT* 09 28 21.1218832104 -78 15 35.367616224   9.43 8.99     F6/7IV/V 25 0
10 HD 84075 TT* 09 36 17.8234661352 -78 20 41.588588076   9.18 8.59     G2V 57 0
11 HD 86356 TT* 09 51 50.6839987728 -79 01 37.826858352   10.93 10.201   9.243 K0Ve 30 0
12 HD 86588 ** 09 53 13.7246814696 -79 33 28.627177500   10.17 9.63     F6V 21 0
13 2MASS J10093502-8105509 TT* 10 09 35.0354015640 -81 05 50.897061420           G8 9 0
14 HD 90480 PM* 10 27 26.1547360176 +35 56 36.286085832   9.78 9.30     F5 4 0
15 HD 92727A TT* 10 39 31.7269349640 -75 37 56.278132680   10.27 9.68 9.86   G1V 6 0
16 HD 92727 ** 10 39 31.72928 -75 37 56.2785           F7/8(V) 26 0
17 Hen 3-545 Or* 10 59 06.9715593000 -77 01 40.309233240   12.91 11.136   9.596 K4Ve 216 0
18 CHXR 8 TT* 11 00 14.5258321680 -77 14 38.001503400   11.95 11.40 11.28 10.61 G3/9 14 0
19 V* TW Hya TT* 11 01 51.9053285064 -34 42 17.033218380   11.94 10.50 10.626 9.18 K6Ve 1892 1
20 V* CS Cha Or* 11 02 24.8763629208 -77 33 35.667131796   12.88 11.69   10.123 K2Ve 230 0
21 Glass C TT* 11 03 11.5657030464 -77 21 04.321403100   12.59 11.48     G2V 32 0
22 NAME Cha 1 MoC 11 06 48 -77 18.0           ~ 1154 1
23 V* VW Cha Or* 11 08 01.502064 -77 42 28.87524 13.91 14.165 12.761 12.653 10.69 K7+M0 187 0
24 HD 97048 Ae* 11 08 03.3109731720 -77 39 17.490777444 9.03 8.76 9.00   8.64 A0Vep 543 0
25 V* HP Cha TT* 11 08 15.216432 -77 33 53.17020   14.33 12.77 12.11   K3+G5e 114 0
26 V* HP Cha A * 11 08 15.4974157248 -77 33 53.446498956           K6e 85 0
27 HD 97300 Ae* 11 09 50.0199904704 -76 36 47.718191232   9.41 9.20   8.82 B9V 176 1
28 Sz 41 TT* 11 12 24.3973943352 -76 37 06.181395384   11.2 11.60   10.22 K7+M2.5 102 1
29 V* CV Cha Or* 11 12 27.7055693328 -76 44 22.302807396   12.02 10.98 10.51 9.76 G9Ve 194 1
30 Ass Cha T 2-54 TT* 11 12 42.6709132056 -77 22 22.943489160     11.103   9.653 G8+K7 92 2
31 CPD-77 660 TT* 11 20 19.8911036832 -78 28 21.186312744   11.98 10.924 10.567 9.362 K5e 20 0
32 HD 99827 TT* 11 25 17.7399826296 -84 57 16.359618801   8.08 7.64     F5V 51 0
33 RX J1140.3-8321 TT* 11 40 16.6137236784 -83 21 00.350133984   12.604 11.464 11.197 10.132 K4Ve 31 0
34 RX J1150.4-7704 TT* 11 50 28.2998335776 -77 04 38.269946136     12.0   10.54 K4 23 0
35 [DB2002b] G300.23-16.89 DNe 11 54 31 -79 27.8           ~ 45 1
36 NAME Chamaeleon Region SFR 11 55 -78.0           ~ 806 0
37 V* T Cha Or* 11 57 13.5245085552 -79 21 31.530508884   10.00 11.86     K0e 272 1
38 V* DW Cha Ro* 11 58 28.1662230312 -77 54 29.563860420   11.63 10.502   9.011 K4Ve 47 1
39 RX J1159.7-7601 TT* 11 59 42.2711847672 -76 01 26.178271284   12.46 11.11   9.858 K4Ve 63 0
40 HD 104467 TT* 12 01 39.1168325928 -78 59 16.915311240   9.26 8.466   7.678 G3V(e) 56 0
41 2MASS J12033923-8129422 TT* 12 03 39.1709536176 -81 29 42.212654988           K1 12 0
42 CPD-75 783 TT* 12 07 51.174576 -75 55 16.05828   11.16 10.04 9.90 8.584 K4(e) 21 0
43 RX J1209.8-7344 TT* 12 09 42.8209730184 -73 44 41.444953692   12.31 11.29   10.135 K1e 19 0
44 HD 106772 * 12 17 26.9112030432 -80 35 06.827693568   9.40 8.54     G4III 20 0
45 CD-74 673 TT* 12 20 34.3777314336 -75 39 28.630039572   11.55 10.588   9.449 K3Ve 33 0
46 HD 107722 TT* 12 23 29.0429848776 -77 40 51.427021368   8.75 8.29     F6V 29 0
47 CD-78 502 TT* 12 25 13.4187998472 -78 57 34.670490084   11.36 10.70     G7 21 0
48 HD 109138 TT* 12 33 29.7897267528 -75 23 11.250927348   10.24 9.47     K0V 47 0
49 IRAS 12340-7958 LP* 12 37 39.7408011816 -80 15 13.707391932   16.11 14.39 13.63 9.81 ~ 107 0
50 NAME Cha III MoC 12 37.8 -80 15           ~ 140 2
51 CD-74 712 TT* 12 39 21.2761289184 -75 02 39.186556764   11.15 10.303   9.197 K3Ve 46 0
52 NAME Cha II MoC 12 54 -77.2           ~ 337 0
53 Hen 3-854 Or* 13 05 20.6574078672 -77 39 01.506188880   13.88 12.40     K5 45 0
54 TYC 9413-2147-1 TT* 13 07 22.9175828808 -76 02 36.250602504   11.649 10.428 10.259   K0 15 0
55 2MASS J13254188-7955160 TT* 13 25 41.8746157752 -79 55 16.198786884   12.387 11.509 11.308 10.60 K1 12 0
56 [CAA97] RX J1349.2-7549E * 13 49.2 -75 49           G3 2 0
57 CD-75 652 TT* 13 49 12.9354906672 -75 49 47.448396768   10.22 9.680   8.724 G1V 25 0

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