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Table 3

Selected astrometric data for the 34 TWA stars (and stellar systems).

(1) (2) (3) (4) (5) (6) (7) (8) (9) (10) (11) (12) (13) (14)
Star α δ σ α σ δ μαcosδ μ δ Ref. V r Ref. π Ref. CP Traceback
(h:m:s) (°) (mas) (mas) (mas/yr) (mas/yr) (km s-1) (mas) Member. Age deter.

TWA 1 11 01 51.905 –34 42 17.03 05 04 –73.4 ± 2.3 –17.5 ± 2.3 1 12.66 ± 0.22 7 18.6 ± 2.1 12 Y +
TWA 2 11 09 13.798 –30 01 39.88 16 13 –88.4 ± 1.0 –21.2 ± 0.8 2 10.58 ± 0.51 8 24.0 ± 4.8 3 Y +
TWA 3 11 10 27.894 –37 31 51.97 14 15 –105.9 ± 0.9 –17.3 ± 1.0 2 9.52 ± 0.86 8 28.3 ± 1.6* 3 Y +
TWA 4 11 22 05.288 –24 46 39.74 04 18 –91.7 ± 1.6 –31.1 ± 1.4 1 9.20 ± 0.10 7 22.3 ± 2.3 12 Y +
TWA 5 11 31 55.260 –34 36 27.25 10 12 –79.6 ± 0.8 –22.6 ± 0.9 2 13.30 ± 2.00 8 20.5 ± 2.4 3 Y r
TWA 6 10 18 28.701 –31 50 02.86 14 12 –55.0 ± 1.2 –19.8 ± 1.0 2 16.90 ± 5.00 15 14.9 ± 4.4* 3 Y r
TWA 7 10 42 30.100 –33 40 16.28 128 63 –114.4 ± 0.8 –19.1 ± 0.8 3 12.21 ± 0.24 8 29.0 ±2.1 3 Y +
TWA 8A 11 32 41.263 –26 51 55.99 09 09 –90.6 ± 0.9 –32.1 ± 0.8 4 8.34 ± 0.48 8 23.4 ± 2.0 3 Y +
TWA 8B 11 32 41.172 –26 52 09.13 33 78 –93.2 ± 1.3 –27.5 ± 1.2 4 8.93 ± 0.27 8 25.9 ± 2.0 3 Y +
TWA 9A 11 48 24.229 –37 28 49.11 06 03 –55.4 ± 2.3 –17.7 ± 2.3 1 9.46 ± 0.38 7 21.4 ± 2.5 12 Y r
TWA 9B 11 48 23.732 –37 28 48.50 27 27 –51.0 ± 0.6 –18.1 ± 0.6 3 11.30 ± 2.00 15 19.2 ± 1.1 3 Y r
TWA 10 12 35 04.254 –41 36 38.64 16 14 –64.6 ± 0.4 –30.3 ± 0.4 3 6.75 ± 0.40 8 16.2 ± 1.0 3 Y?
TWA 11A 12 36 01.031 –39 52 10.23 02 02 –53.3 ± 1.3 –21.2 ± 1.1 1 9.40 ± 2.30 7 13.7 ± 0.3 12 Y +
TWA 11B 12 36 01.031 –39 52 10.23 02 02 .......... .......... 9.00 ± 1.00 7 .......... Y
TWA 11C 12 35 48.939 –39 50 24.50 26 26 –48.6 ± 1.7 –21.3 ± 1.6 2 .......... 14.5 ± 0.5 5 Y
TWA 12 11 21 05.484 –38 45 16.51 16 17 –66.6 ± 1.5 –11.7 ± 1.5 2 13.12 ± 1.59 8 15.4 ± 1.7 3 Y +
TWA 13A 11 21 17.219 –34 46 45.47 13 16 –66.4 ± 2.4 –12.5 ± 1.8 5 11.67 ± 0.64 7 18.0 ± 0.7 5 Y +
TWA 13B 11 21 17.446 –34 46 49.83 13 16 –68.0 ± 3.1 –11.0 ± 2.7 5 12.57 ± 0.50 7 16.8 ± 0.7 5 Y +
TWA 14 11 13 26.221 –45 23 42.75 14 14 –43.9 ± 1.4 –7.4 ± 1.4 2 15.83 ± 2.00 8 10.4 ± 1.2 5 Y +
TWA 15A 12 34 20.649 –48 15 13.48 17 17 –37.5 ± 2.4 –10.4 ± 2.0 5 11.20 ± 2.00 15 9.1 ± 1.7 5 Y +
TWA 15B 12 34 20.473 –48 15 19.59 22 17 –36.5 ± 2.9 –9.9 ± 2.8 5 10.03 ± 1.66 8 8.6 ± 1.6 5 Y +
TWA 16 12 34 56.303 –45 38 07.63 18 11 –47.5 ± 1.3 –20.2 ± 0.8 2 9.01 ± 0.42 8 12.8 ± 0.5 5 Y?
TWA 17 13 20 45.388 –46 11 37.72 16 10 –31.3 ± 1.1 –17.7 ± 1.0 2 4.60 ± 6.00 15 .......... N
TWA 18 13 21 37.225 –44 21 51.84 14 14 –32.1 ± 1.1 –20.4 ± 1.1 2 6.90 ± 3.00 15 .......... N
TWA 19A 11 47 24.545 –49 53 03.01 03 03 –33.7 ± 1.1 –9.1 ± 1.1 1 11.50 ± 3.80 7 10.9 ± 1.3 12 N
TWA 19B 11 47 20.642 –49 53 04.31 44 47 –21.6 ± 1.7 –23.4 ± 1.6 4 15.20 ± 2.00 15 .......... N
TWA 20 12 31 38.068 –45 58 59.47 12 12 –63.5 ± 1.1 –27.8 ± 1.1 2 8.10 ± 4.00 15 12.9 ± 0.6 5 Y?
TWA 21 10 13 14.774 –52 30 53.95 16 10 –60.9 ± 1.5 13.9 ± 0.8 2 17.50 ± 0.80 10 19.8 ± 1.4 3 Y r
TWA 22 10 17 26.905 –53 54 26.42 18 18 –175.8 ± 0.8 –21.3 ± 0.8 13 13.57 ± 0.26 8 57.0 ± 0.7 13 N
TWA 23 12 07 27.377 –32 47 00.25 18 15 –75.8 ± 0.9 –25.7 ± 0.9 3 8.52 ± 1.20 8 20.6 ± 1.8 3 Y +
TWA 24 12 09 41.861 –58 54 45.08 12 18 –35.2 ± 1.8 –14.9 ± 2.1 2 11.90 ± 0.90 10 .......... N
TWA 25 12 15 30.723 –39 48 42.59 12 13 –73.2 ± 0.8 –27.7 ± 0.8 2 9.20 ± 2.10 10 18.5 ± 1.2 5 Y?
TWA 26 11 39 51.140 –31 59 21.50 60 60 –93.3 ± 0.5 –27.5 ± 0.5 3 11.60 ± 2.00 14 26.2 ± 1.1 3 Y r
TWA 27 12 07 33.467 –39 32 54.00 60 60 –64.2 ± 0.4 –22.6 ± 0.4 3 11.02 ± 2.00 14 19.1 ± 0.4 3 Y r
TWA 28 11 02 09.833 –34 30 35.53 60 60 –67.2 ± 0.6 –14.0 ± 0.6 13 .......... - 18.1 ± 0.5 13 Y
TWA 29 12 45 13.798 –44 28 47.63 44 38 –71.0 ± 7.0 –23.0 ± 3.0 3 .......... - 12.7 ± 2.1 5 Y
TWA 30A 11 32 18.315 –30 19 51.85 20 20 –87.8 ± 1.3 –25.2 ± 1.3 2 12.30 ± 1.50 11 18.0 ± 2.2* 3 Y r
TWA 30B 11 32 16.921 –30 18 10.53 21 21 –83.0 ± 9.0 –30.0 ± 9.0 11 12.00 ± 3.00 11 17.8 ± 4.8* 3 Y r
TWA 31 12 07 16.547 –32 30 22.36 10 10 –42.0 ± 6.0 –36.0 ± 3.0 6 10.47 ± 0.41 8 .......... N
TWA 32 12 26 51.367 –33 16 12.54 32 79 –59.7 ± 2.4 –22.9 ± 2.2 4 7.15 ± 0.26 8 13.0 ± 0.7* 3 Y +
TWA 33 11 39 33.846 –30 40 00.34 50 45 –73.3 ± 2.9 –25.4 ± 2.6 4 .......... 19.0 ± 1.2* 3 Y
TWA 34 10 28 45.790 –28 30 37.53 38 35 –68.6 ± 2.7 –11.4 ± 2.5 4 .......... 20.0 ± 1.3* 3 Y

Notes. In Cols. 2–5 we provide for each star its position (epoch = 2000.0) from UCAC4 whenever available otherwise from SPM4 or 2MASS. The proper motion, radial velocity, parallax, and the corresponding references are given in Cols. 6–12. Parallaxes with a “*” symbol are kinematic parallaxes derived in Sect. 4.3. Column 13 gives the membership status derived from the CP search method (Y = member, N = non-member, Y? = possible member) as defined in Sect. 4.4. Column 14 summarizes the participation of CP members to the traceback age determination (see Sect. 5.2 for details) (+ = participation, r = rejected, –: not member or lack of data).

Reference. (1) Tycho-2 (Høg et al. 2000); (2) UCAC4 (Zacharias et al. 2013); (3) This paper or Ducourant et al. (2008); (4) SPM4 (Girard et al. 2011); (5) Weinberger et al. (2013); (6) Schneider et al. (2012a); (7) Torres et al. (2003); (8) Shkolnik et al. (2011); (9) Torres et al. (2008); (10) Song et al. (2003); (11) Looper et al. (2010a,b); (12) Hipparcos (van Leeuwen 2007); (13) Teixeira et al. (2008, 2009); (14) Mohanty et al. (2003); (15) Reid (2003).

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