Table 1
Main properties of Gl 581.
| Property | Value | Reference |
|
|
||
| Type | M 3 | Udry et al. (2007) |
| Mass | 0.31 M ⊙ | Bonfils et al. (2005) |
| Luminosity | 0.013 L ⊙ | Udry et al. (2007), Bonfils et al. (2005) |
| 0.0135 L ⊙ | Selsis et al. (2007) | |
| Radius | 0.38 R ⊙ | Lacy (1977), Johnson & Wright (1983) |
| 0.29 R ⊙ | Chabrier & Baraffe (2000) | |
| T eff | 3190 K | calculated with the Stefan-Boltzmann law |
| 3249 K | Johnson & Wright (1983) | |
| 3760 K | Butler et al. (2006) | |
| [ Fe/H ] | –0.10 | Johnson & Apps (2009) |
| –0.25 | Bonfils et al. (2005) | |
| distance | 6.27 pc | Butler et al. (2006) |
| 6.53 pc | Johnson & Wright (1983), Lacy (1977) | |
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