Characterization of M dwarfs Using Optical Mid-Resolution Spectra for Exploration of Small Exoplanets

Yohei Koizumi, Masayuki Kuzuhara, Masashi Omiya +4

We present the optical spectra of 338 nearby M dwarfs, and compute their spectral types, effective temperatures ($T_{\mathrm{eff}}$), and radii. Our spectra have been obtained usin…