Measuring Fundamental Parameters of Substellar Objects. I. Surface Gravities
Measuring Fundamental Parameters of Substellar Objects. I. Surface Gravities
We present an analysis of high-resolution optical spectra for a sample of very young, mid- to late-M, low-mass stellar and substellar objects: 11 in the Upper Scorpius association, and two (GG Tau Ba and Bb) in the Taurus star-forming region. Effective temperatures and surface gravities are derived from a multiple-feature …