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A High Precision, Optical Polarimeter to Measure Inclinations of High Mass X-Ray Binaries
Sloane J. Wiktorowicz, Keith Matthews
We present commissioning data for the POLISH instrument obtained on the Hale 5-m telescope. The goal of this high precision polarimeter is to constrain orbital inclination of high…
Masses, Luminosities, and Orbital Coplanarities of the mu Orionis Quadruple Star System from PHASES Differential Astrometry
Matthew W. Muterspaugh, Benjamin F. Lane, Francis C. Fekel +6
mu Orionis was identified by spectroscopic studies as a quadruple star system. Seventeen high precision differential astrometry measurements of mu Ori have been collected by the Pa…
Liquid Water Oceans in Ice Giants
Sloane J. Wiktorowicz, Andrew P. Ingersoll
Aptly named, ice giants such as Uranus and Neptune contain significant amounts of water. While this water cannot be present near the cloud tops, it must be abundant in the deep int…
Masses of Astrometrically-Discovered and Imaged Binaries: G 78-28AB and GJ 231.1BC
Steven H. Pravdo, Stuart B. Shaklan, Sloane J. Wiktorowicz +5
The Stellar Planet Survey (STEPS) is an ongoing astrometric search for giant planets and brown dwarfs around a sample of ~30 M-dwarfs. We have discovered several low-mass companion…
A Spitzer Search for Infrared Excesses around Massive Young White Dwarfs
Brad M. S. Hansen, Shri Kulkarni, Sloane Wiktorowicz
We examine 14 hot white dwarfs for signs of infrared excess using the Spitzer Space Telescope. Twelve of the objects are massive white dwarfs which have been suggested to be the re…
PHASES Differential Astrometry and Iodine Cell Radial Velocities of the kappa Pegasi Triple Star System
Matthew W. Muterspaugh, Benjamin F. Lane, Maciej Konacki +5
kappa Pegasi is a well-known, nearby triple star system. It consists of a ``wide'' pair with semi-major axis 235 milli-arcseconds, one component of which is a single-line spectrosc…