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C. R. Thom (Swinburne), M. E. Putman (UMich), B. K. Gibson (Swinburne), N. Christlieb (Hamburger Sternwarte), C. Flynn (Tuorla Observatory), T. C. Beers (MSU)
We present the first results of a programme to constrain the distances to High-Velocity Clouds. Such distance limits have been keenly sought for more than 40 years, yet remain elusive. Field Horizontal Branch stars have been selected from the Hamburg/ESO Survey, and correlated with the HI Parkes All-Sky Survey to identify suitable stars aligned with high column-density HVC gas. Echelle spectra of these stars have provided distance constraints to several HVCs. A distance limit to HVC Complex WB will be discussed. Detection of this HVC in absorption gives a direct distance constraint, placing it within the Milky Way halo. This constraint stands in contrast to predictions that the cloud is extra-galactic.
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Bulletin of the American Astronomical Society, 37 #4
© 2005. The American Astronomical Soceity.