Cool Subdwarf Investigations II: Multiplicity (2009)
Jao, Wei-Chun, Mason, Brian D., Hartkopf, William I, Henry, Todd J., Ramos, Stephanie N.
Cool subdwarfs of types K and M are the fainter counterparts of cool main sequence dwarfs that dominate the Galactic population. In this paper we present the results of an optical speckle survey of...
The High Angular Resolution Multiplicity of Massive Stars (2008)
Mason, Brian D., Hartkopf, William I., Gies, Douglas R., Henry, Todd J., Helsel, John W.
We present the results of a speckle interferometric survey of Galactic massive stars that complements and expands upon a similar survey made over a decade ago. The speckle observations were made with...
Turner, Nils H., Brummelaar, Theo A. Ten, Roberts Jr., Lewis C., Mason, Brian D., Hartkopf, William I., Gies, Douglas R.
We present the results of an adaptive optics survey for faint companions among Galactic O-type star systems (V < 8) using the Advanced Electro-Optical System (AEOS) 3.6-meter telescope on Haleakala....
Addressing confusion in double star nomenclature: the Washington multiplicity catalog (2004)
Hartkopf, William I., Mason, Brian D.
Los avances en la instrumentacion y la reduccion de datos estan borrando las diferencias historicas entre los diversos tipos de estrellas dobles. Un resultado de ello es la creciente confusion en la...
Speckle Interferometry at the US Naval Observatory, IX (1998)
Mason, Brian D., Hartkopf, William I., Wycoff, Gary L., Pascu, Dan, Urban, Sean E.
The results of 3056 speckle interferometric observations of double stars made with the 26 inch (66 cm) refractor of the US Naval Observatory are presented. Each speckle interferometric observation of...