Table 1
Stellar parameters for Teegarden’s Star.
| Parameter | Value | Ref. |
|---|---|---|
| Discovery name | Teegarden’s Star | Tee03 |
| Alias name | GAT 1370 | Gat09 |
| Karmn (a) | J02530 + 168 | Cab16 |
| α | 02 53 00.89 | Gaia |
| δ | +16 52 52.6 | Gaia |
| μα cos δ (mas yr−1) | 3429.53 ± 0.33 | Gaia |
| μδ (mas yr−1) | − 3806.16 ± 0.31 | Gaia |
| l (deg) (b) | 45.82636650288 | Gaia |
| b (deg) (b) | +0.30111982472 | Gaia |
| π (mas) | 261.01 ± 0.27 | Gaia |
| 259.6 ± 0.6 | Wei16 | |
| 259.3 ± 0.9 | Gat09 | |
| d (pc) | 3.831 ± 0.004 | Gaia |
| V (mag) | 15.08 ± 0.12 | Hen15 |
| J (mag) | 8.39 ± 0.03 | 2MASS |
| Sp. type | M7.0 V | Alo15 |
| Teff (K) | 2904 ± 51 | Sch19 |
| 2637 ± 30 | Roj12 | |
| L (L⊙) | 0.000 73 ± 0.000 01 | Sch19 |
| 0.000 73 ± 0.000 02 | Die14 | |
| R (R⊙) | 0.107 ± 0.004 | Sch19 |
| 0.127 ± 0.004 | Die14 | |
| M (M⊙) | 0.089 ± 0.009 | Sch19 |
| [Fe/H] (dex) | − 0.19 ± 0.16 | Sch19 |
| − 0.55 ± 0.17 | Roj12 | |
| U (km s−1) | − 69.46 ± 0.31 | Cor16 |
| V (km s−1) | − 71.17 ± 0.15 | Cor16 |
| W (km s−1) | − 58.68 ± 0.25 | Cor16 |
| γ (km s−1) | +68.375 | Rei18 |
| v sin i (km s−1) | <2 | Rei18 |
| log LHα∕Lbol | − 5.37 | This work |
| log LX∕Lbol | < − 4.23 | Ste14, this work |
| Age [Gyr] | >8 | This work |
Notes. (a) Carmencita identifier. (b) Heliocentric ecliptic longitude and latitude. References.2MASS: Skrutskie et al. (2006); Alo15: Alonso-Floriano et al. (2015); Cab16: Caballero et al. (2016); Cor16: Cortés Contreras (2016); Die14: Dieterich et al. (2014); Gaia: Gaia Collaboration (2018); Gat09: Gatewood & Coban (2009); Hen15: Henden et al. (2015); Rei18: Reiners et al. (2018); Roj12: Rojas-Ayala et al. (2012); Sch19: Schweitzer et al. (2019); Ste14: Stelzer et al. (2014); Tee03: Teegarden et al. (2003); Wei16: Weinberger et al. (2016).
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