Table 1
Absolute trigonometric parallaxes and proper motions derived in this work for the 13 TWA stars.
Star | α | δ | π | d | μαcosδ | μ δ | Δπ | Δμαcosδ | Δμδ |
(h:m:s) | (°′′′) | (mas) | (pc) | (mas/yr) | (mas/yr) | (mas) | (mas/yr) | (mas/yr) | |
|
|||||||||
TWA 1 | 11 05 51.97 | –34 42 16.9 | 20.8 ± 4.0 | 48.1 ± 9.3 | −68.4 ± 1.5 | −8.0 ± 1.5 | 0.78 | –7.18 | 1.11 |
TWA 2 | 11 09 13.88 | –30 01 39.7 | 24.0 ± 4.8 | 41.6 ± 8.3 | −87.7 ± 2.3 | −7.9 ± 2.3 | 0.81 | –7.20 | 0.24 |
TWA 5 | 11 31 55.46 | –34 36 28.8 | 20.5 ± 2.4 | 48.7 ± 5.7 | −75.8 ± 1.0 | −18.3 ± 1.0 | 0.73 | –7.00 | 0.28 |
TWA 7 | 10 42 30.20 | –33 40 16.0 | 29.0 ± 2.1 | 34.5 ± 2.5 | −114.4 ± 0.8 | −19.1 ± 0.8 | 0.85 | –7.24 | 1.45 |
TWA 8A | 11 32 41.32 | –26 51 55.6 | 23.4 ± 2.0 | 42.8 ± 3.7 | −87.1 ± 0.8 | −28.0 ± 0.8 | 0.89 | –7.62 | –1.00 |
TWA 8B | 11 32 41.23 | –26 52 08.7 | 25.9 ± 2.0 | 38.6 ± 3.0 | −86.5 ± 0.9 | −25.0 ± 0.9 | 0.89 | –7.62 | –1.00 |
TWA 9A | 11 48 24.22 | –37 28 49.2 | 19.1 ± 2.7 | 52.3 ± 7.4 | −53.1 ± 3.9 | −24.9 ± 3.9 | 0.71 | –7.05 | 0.10 |
TWA 9B | 11 48 23.77 | –37 28 48.3 | 19.2 ± 1.1 | 52.1 ± 3.0 | −51.0 ± 0.6 | −18.1 ± 0.6 | 0.71 | –7.05 | 0.10 |
TWA 10 | 12 35 04.31 | –41 36 38.3 | 16.2 ± 1.0 | 61.5 ± 3.8 | −64.6 ± 0.4 | −30.3 ± 0.4 | 0.55 | –6.58 | –0.52 |
TWA 12 | 11 21 05.55 | –38 45 16.2 | 15.4 ± 1.7 | 65.1 ± 7.2 | −66.2 ± 0.5 | −7.4 ± 0.5 | 0.67 | –6.80 | 0.70 |
TWA 21 | 10 13 14.85 | –52 30 54.1 | 19.8 ± 1.4 | 50.4 ± 3.6 | −61.3 ± 0.6 | 10.6 ± 0.6 | 1.03 | –7.49 | 3.39 |
TWA 23 | 12 07 27.44 | –32 47 00.0 | 20.6 ± 1.8 | 48.4 ± 4.2 | −75.8 ± 0.9 | −25.7 ± 0.9 | 0.74 | –7.23 | –0.79 |
TWA 26 | 11 39 51.21 | –31 59 21.2 | 26.2 ± 1.1 | 38.1 ± 1.6 | −93.3 ± 0.5 | −27.5 ± 0.5 | 0.64 | –6.30 | 0.11 |
Notes. For each star we provide its position (epoch = 2000.0), absolute parallax, distance, absolute proper motions, and the Δ corrections applied to relative values of parallax and proper motions. For example, to obtain absolute parallax for TWA 1, πrelative + 0.78 = π given in Col. 4.
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