The absolute magnitudes $M_J$, the binary fraction, and the binary mass ratios of M7 to M9.5 dwarfs

R. C. Laithwaite, S. J. Warren

We use the large homogeneous sample of late M dwarfs, M7 to M9.5, of Ahmed & Warren (2019) matched to $\text{Gaia}$ DR2, to measure the relation between absolute magnitude and sp…