Publications (68)
New Neighbors from 2MASS: Activity and Kinematics at the Bottom of the Main Sequence
John E. Gizis, David G. Monet, I. Neill Reid +3
We have combined 2MASS and POSS II data in a search for nearby ultracool (later than M6.5) dwarfs with K_s<12. Spectroscopic follow-up observations identify 53 M7 to M9.5 dwarfs an…
New Close Binary Systems from the SDSS-I (Data Release Five) and the Search for Magnetic White Dwarfs in Cataclysmic Variable Progenitor Systems
Nicole M. Silvestri, Mara P. Lemagie, Suzanne L. Hawley +13
We present the latest catalog of more than 1200 spectroscopically-selected close binary systems observed with the Sloan Digital Sky Survey through Data Release Five. We use the cat…
The Discovery of Two Nearby Carbon Dwarfs
Patrick J. Lowrance, J. Davy Kirkpatrick, I. Neill Reid +2
The comparison of optical and 2MASS near-infrared photometry for large samples of catalogued proper motion stars has the potential to discover previously unrecognized nearby object…
Substellar Companions to Main Sequence Stars: No Brown Dwarf Desert at Wide Separations
John E. Gizis, J. Davy Kirkpatrick, Adam Burgasser +4
We use three field L and T dwarfs which were discovered to be wide companions to known stars by the Two Micron All-Sky Survey (2MASS) to derive a preliminary brown dwarf companion…
Post-T Tauri Stars in the Nearest OB Association
Eric E. Mamajek, Michael R. Meyer, James Liebert
We present results of a spectroscopic survey of X-ray- and proper motion-selected samples of late-type stars in the Lower Cen-Cru (LCC) and Upper Cen-Lup (UCL) subgroups of the nea…
Discovery of New Ultracool White Dwarfs in the Sloan Digital Sky Survey
Evalyn Gates, Geza Gyuk, Hugh C. Harris +14
We report the discovery of five very cool white dwarfs in the Sloan Digital Sky Survey (SDSS). Four are ultracool, exhibiting strong collision induced absorption (CIA) from molecul…