Properties of 363 M-dwarfs from TESS

We find that for comparable insolations, planets larger than 1.5R{Earth} (sub-Neptunes) are significantly less abundant around mid-to-late M dwarfs compared to earlier-type stars, while the occurrence rate of terrestrial planets is comparable to that of more massive M-dwarfs. We estimate that overall, terrestrials outnumber sub-Neptunes around mid-to-late M-dwarfs by 14 to 1, in contrast to GK dwarfs, where they are roughly equinumerous.

We place a 1{sigma} upper limit of 0.07 planets larger than 1.5R{Earth} per star within the orbital period range of 0.5-7days. We find evidence for a downturn in occurrence rates for planet radii below 0.9R{Earth}, suggesting that Earth-sized and larger terrestrials may be more common around mid-to-late M-dwarfs.