Table 5
Physical parameters derived for TWA stars with known distances.
| Siess et al. (2000) | Baraffe et al. (1998) | |||||||||||||
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| Star | ST | T eff | A V | H abs | log (L/L⊙) | log (M/M⊙) | log t | log (M/M⊙) | log t | Ref. | ||||
| (K) | (mag) | (mag) | (t in Myr) | (t in Myr) | ||||||||||
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| TWA 1 | K8 | 3940 | 0.00 | 3.91 ± 0.25 | −0.58 ± 0.12 | −0.16 ± 0.01 | 6.90 ± 0.19 | −0.10 ± 0.03 | 7.09 ± 0.21 | 1,2,3,4 | ||||
| TWA 2A | M0.5 | 3704 | 0.33 | 4.22 ± 0.44 | −0.75 ± 0.20 | −0.34 ± 0.01 | 6.81 ± 0.26 | −0.23 ± 0.08 | 7.02 ± 0.29 | 1,3,6,10 | ||||
| TWA 2B | M2 | 3490 | 0.00 | 5.01 ± 0.44 | −1.09 ± 0.20 | −0.50 ± 0.03 | 6.91 ± 0.24 | −0.39 ± 0.06 | 7.13 ± 0.27 | 1,3,5,6 | ||||
| TWA 3A | M4 | 3160 | 0.00 | 4.79 ± 0.13 | −1.03 ± 0.07 | −0.75 ± 0.02 | 6.60 ± 0.05 | −0.74 ± 0.04 | 6.38 ± 0.07 | 3,5,6 | ||||
| TWA 3B | M4 | 3160 | 0.00 | 5.41 ± 0.14 | −1.28 ± 0.08 | −0.81 ± 0.02 | 6.78 ± 0.06 | −0.81 ± 0.03 | 6.61 ± 0.06 | 3,5,6 | ||||
| TWA 4A | K5 | 4140 | 0.00 | 3.31 ± 0.24 | −0.31 ± 0.12 | −0.06 ± 0.01 | 6.73 ± 0.20 | −0.04 ± 0.01 | 6.81 ± 0.22 | 5,7,8 | ||||
| TWA 4B | K7,M1 | 3970 | 0.00 | 3.32 ± 0.24 | −0.34 ± 0.12 | −0.16 ± 0.01 | 6.56 ± 0.18 | −0.10 ± 0.03 | 6.70 ± 0.20 | 5,7,8 | ||||
| TWA 5Aa | M2 | 3490 | 0.00 | 4.25 ± 0.26 | −0.79 ± 0.12 | −0.46 ± 0.01 | 6.55 ± 0.10 | −0.40 ± 0.06 | 6.70 ± 0.17 | 1,3,5,9 | ||||
| TWA 5Ab | M2 | 3490 | 0.00 | 4.35 ± 0.26 | −0.83 ± 0.12 | −0.47 ± 0.01 | 6.60 ± 0.14 | −0.39 ± 0.05 | 6.75 ± 0.18 | 1,3,5,9 | ||||
| TWA 6 | M0 | 3770 | 0.00 | 4.05 ± 0.64 | −0.67 ± 0.28 | −0.29 ± 0.01 | 6.72 ± 0.39 | −0.19 ± 0.06 | 7.00 ± 0.43 | 1,3,4 | ||||
| TWA 7 | M3 | 3360 | 0.00 | 4.44 ± 0.16 | −0.87 ± 0.07 | −0.56 ± 0.01 | 6.61 ± 0.08 | −0.54 ± 0.05 | 6.55 ± 0.09 | 1,3,4 | ||||
| TWA 8A | M3 | 3360 | 0.00 | 4.57 ± 0.21 | −0.93 ± 0.11 | −0.56 ± 0.02 | 6.63 ± 0.12 | −0.55 ± 0.05 | 6.62 ± 0.15 | 1,3,10 | ||||
| TWA 9A | K7 | 3970 | 0.00 | 4.60 ± 0.27 | −0.86 ± 0.14 | −0.16 ± 0.03 | 7.38 ± 0.22 | −0.15 ± 0.08 | 7.58 ± 0.21 | 1,2,3,10 | ||||
| TWA 9B | M3.5 | 3255 | 0.00 | 5.83 ± 0.16 | −1.44 ± 0.09 | −0.74 ± 0.01 | 7.02 ± 0.09 | −0.72 ± 0.03 | 6.97 ± 0.11 | 1,3,10 | ||||
| TWA 10 | M2 | 3490 | 0.36 | 4.47 ± 0.14 | −0.88 ± 0.07 | −0.47 ± 0.01 | 6.66 ± 0.08 | −0.39 ± 0.05 | 6.82 ± 0.11 | 1,3,4 | ||||
| TWA 11A | A0 | 9700 | 0.00 | 1.48 ± 0.06 | 1.40 ± 0.03 | + 0.35 ± 0.01 | 6.80 ± 0.06 | ................ | ................ | 2,4,5 | ||||
| TWA 11B | M2 | 3490 | 0.00 | 4.30 ± 0.14 | −0.81 ± 0.08 | −0.46 ± 0.01 | 6.58 ± 0.09 | −0.40 ± 0.05 | 6.73 ± 0.10 | 5,10 | ||||
| TWA 11C | M4.5 | 3001 | 0.00 | 5.03 ± 0.08 | −1.13 ± 0.04 | −0.95 ± 0.01 | 6.60 ± 0.02 | −1.00 ± 0.02 | 6.18 ± 0.08 | 1,4 | ||||
| TWA 12 | M2 | 3490 | 0.27 | 4.23 ± 0.24 | −0.78 ± 0.11 | −0.46 ± 0.01 | 6.55 ± 0.12 | −0.40 ± 0.06 | 6.69 ± 0.15 | 1,3,4 | ||||
| TWA 13A | M1 | 3630 | 0.00 | 4.00 ± 0.11 | −0.67 ± 0.06 | −0.38 ± 0.01 | 6.54 ± 0.08 | −0.27 ± 0.05 | 6.80 ± 0.08 | 1,3,4 | ||||
| TWA 13B | M1 | 3630 | 0.31 | 3.76 ± 0.11 | −0.57 ± 0.06 | −0.38 ± 0.01 | 6.42 ± 0.07 | −0.28 ± 0.05 | 6.67 ± 0.09 | 1,3,4 | ||||
| TWA 14 | M0 | 3770 | 0.00 | 4.57 ± 0.26 | −0.88 ± 0.12 | −0.30 ± 0.01 | 7.02 ± 0.19 | −0.21 ± 0.05 | 7.33 ± 0.19 | 4,5,11 | ||||
| TWA 15A | M1.5 | 3562 | 0.00 | 4.73 ± 0.41 | −0.97 ± 0.18 | −0.44 ± 0.01 | 6.84 ± 0.22 | −0.32 ± 0.06 | 7.10 ± 0.25 | 4,5,12 | ||||
| TWA 15B | M2 | 3490 | 0.00 | 4.49 ± 0.41 | −0.88 ± 0.18 | −0.48 ± 0.02 | 6.73 ± 0.20 | −0.39 ± 0.05 | 6.83 ± 0.26 | 4,5,12 | ||||
| TWA 16 | M2 | 3490 | 0.00 | 4.56 ± 0.10 | −0.91 ± 0.06 | −0.47 ± 0.01 | 6.70 ± 0.06 | −0.39 ± 0.05 | 6.88 ± 0.09 | 1,4,13 | ||||
| TWA 20 | M3 | 3360 | 0.00 | 5.01 ± 0.13 | −1.10 ± 0.07 | −0.59 ± 0.01 | 6.81 ± 0.07 | −0.56 ± 0.05 | 6.86 ± 0.10 | 1,4 | ||||
| TWA 21 | K3 | 4550 | 0.00 | 3.84 ± 0.16 | −0.43 ± 0.08 | −0.04 ± 0.03 | 7.41 ± 0.10 | −0.05 ± 0.05 | 7.40 ± 0.12 | 1,4 | ||||
| TWA 23 | M1 | 3630 | 0.00 | 5.35 ± 0.19 | −1.21 ± 0.09 | −0.41 ± 0.01 | 7.25 ± 0.13 | −0.28 ± 0.06 | 7.59 ± 0.14 | 1,4 | ||||
| TWA 25 | K9 | 3880 | 0.33 | 3.79 ± 0.15 | −0.55 ± 0.08 | −0.21 ± 0.01 | 6.72 ± 0.11 | −0.12 ± 0.03 | 6.98 ± 0.12 | 1,3,4 | ||||
Notes. We provide for each star the spectral type, temperature, visual extinction, absolute magnitude from H flux, luminosity, mass, and age derived from the Siess et al. (2000) and Baraffe et al. (1998) models, and the sources of photometric/spectroscopic information. The photometry of TWA 2, TWA 3, TWA 4, TWA 5, TWA 8, TWA 9, and TWA 16 are corrected for binarity with the information provided in the corresponding references (last column). TWA 14, TWA 20, and TWA 23 are corrected for binarity assuming that the components have equal brightness (as done by Weinberger et al. 2013). Note that our age and mass estimates for TWA 11C derived from the Baraffe et al. (1998) tracks and isochrones are only indicative because of the grid limits of this model and the star position in the HR diagram (see Fig. 6).
Reference. (1) Pecaut & Mamajek (2013); (2) Hipparcos (ESA 1997); (3) Torres et al. (2006); (4) 2MASS (Cutri et al. 2003); (5) Schneider et al. (2012a); (6) Brandeker et al. (2003); (7) Fernández et al. (2008); (8) Prato et al. (2001); (9) Konopacky et al. (2007); (10) Webb et al. (1999); (11) Messina et al. (2010); (12) Barrado Y Navascués (2006); (13) Zuckerman et al. (2001); (14) Teixeira et al. (2008); (15) Looper et al. (2010a).
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