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Table 2

Coldest M dwarf hosts with measured Ly-α flux.

Star Type Teff FLyα
(K) (erg s-1 cm-2)

TRAPPIST-1 M8 2550 ± 55[1] 0.05
GJ 1214 M4.5 2935 ± 100[2] 0.12
Proxima Cen M5.5 3050 ± 100[4] 0.30 ± 0.06[5]
GJ 876 M5 3062 ± 130[2] 0.37 ± 0.04[3]

Notes. Fluxes are given at 1 au from the stars.

Reference. [1]Gillon et al. (2016); [2]Loyd et al. (2016); [3] Youngblood et al. (2016); [4]Anglada-Escudé et al. (2016); [5]Wood et al. (2005).

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