Physical Sciences and Mathematics Commons^™

Three Wide Separation L-Dwarf Companions From The Two Micron All Sky Survey: Gl 337c, Gl 618.1b, And Hd 89744b, J. C. Wilson, Davy Kirkpatrick, G. E. Gizis, M. F. Skrutskie, D. G. Monet, J. R. Houck

Astronomy Department Faculty Publication Series

We present two confirmed wide separation L-dwarf common proper motion companions to nearby stars and one candidate identified from the Two Micron All Sky Survey. Spectral types from optical spectroscopy are L0 V, L2.5 V, and L8 V. Near-infrared low resolution spectra of the companions are provided as well as a grid of known objects spanning M6 V -- T dwarfs to support spectral type assignment for these and future L-dwarfs in the z'JHK bands. Using published measurements, we estimate ages of the companions from physical properties of the primaries. These crude ages allow us to estimate companion masses using …