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Table 5

Additional M-dwarf benchmark stars, with their magnitudes and spectral type from SIMBAD, metallicities as noted, and Teff from Boyajian et al. (2012).

ID Type V [Fe/H] Teff Status
(mag) (dex) (K)

GJ 205 M1.5V 7.97 +0.35a 3801 iDR3
GJ 436 M3V 10.59 +0.03b 3416 iDR4
GJ 526 M1.5V 8.50 –0.30a 3618 iDR4
GJ 551c M5.5V 11.05 +0.24d 3054
GJ 581 M2.5V 10.61 –0.02b 3442 iDR4
GJ 699 M4V 9.51 –0.39a 3224 iDR3
GJ 880 M1.5V 8.64 +0.03e 3713 iDR2



Metallicity from Rojas-Ayala et al. (2012).


Metallicity from Lindgren et al. (2016).


Not observed yet, we rely on UVES archival data.


Metallicity from Jofré et al. (2014), considering α Cen A and B.


Metallicity from Neves et al. (2014).

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