Nearby M, L, and T Dwarfs Discovered by the Wide-field Infrared Survey Explorer (WISE)

Maggie A. Thompson, J. Davy Kirkpatrick, Gregory N. Mace, Michael C. Cushing, Christopher R. Gelino, Roger L. Griffith, Michael F. Skrutskie, Peter R. M. Eisenhardt, Edward L. Wright, Kenneth A. Marsh, Katholeen J. Mix, Charles A. Beichman, Jacqueline K. Faherty, Odette Toloza, Jocelyn Ferrara, Brian Apodaca, Ian S. McLean, Joshua S. Bloom

Published 2013-05-20Version 1

In our effort to complete the census of low-mass stars and brown dwarfs in the immediate Solar Neighborhood, we present spectra, photometry, proper motions, and distance estimates for forty-two low-mass star and brown dwarf candidates discovered by the Wide-field Infrared Survey Explorer (WISE). We also present additional follow-up information on twelve candidates selected using WISE data but previously published elsewhere. The new discoveries include fifteen M dwarfs, seventeen L dwarfs, five T dwarfs, and five objects of other type. Among these discoveries is a newly identified "unusually red L dwarf" (WISE J223527.07+451140.9), four peculiar L dwarfs whose spectra are most readily explained as unresolved L+T binary systems, and a T9 dwarf (WISE J124309.61+844547.8). We also show that the recently discovered red L dwarf WISEP J004701.06+680352.1 (Gizis et al. 2012) may be a low-gravity object and hence young and potentially low mass (< 25 MJup).