5 papers
Activity and Kinematics of M and L Dwarfs
John E. Gizis
I discuss observations of two traditional age indicators, chromospheric activity and kinematics, in late-M and L dwarfs near the hydrogen-burning limit. The frequency and strength…
The Two Micron All-Sky Survey: Removing the Infrared Foreground
John E. Gizis, Michael F. Skrutskie
We introduce the properties of the Two Micron All-Sky Survey (2MASS) survey for IAU Symposium 204. 2MASS is a near-infrared survey of the entire sky characterized by high reliabili…
A Keck/HST Survey for Companions to Low-Luminosity Dwarfs
D. W. Koerner, J. Davy Kirkpatrick, I. N. Reid +1
We present preliminary results of an imaging survey for companions to low-luminosity dwarfs with spectral types ranging from M7 to L9. A K-band study with the Near Infrared Camera…
Two nearby M dwarf binaries from 2MASS
J. E. Gizis, D. G. Monet, I. N. Reid +2
We report the discovery of two binary M dwarf systems in the immediate solar neighborhood using 2MASS. The first is an M6.5 companion to the nearby G star HD 86728 (Gl 376). The kn…
Discovery of Four Field Methane (T-type) Dwarfs with 2MASS
A. J. Burgasser, J. D. Kirkpatrick, M. E. Brown +8
We report the discovery of four field methane (T-type) brown dwarfs using 2MASS survey data. One additional methane dwarf, previously discovered by SDSS, was also identified. Near-…