Distance Limits to High Velocity Clouds

Details Distance Limits to High Velocity Clouds Distance Limits to High Velocity Clouds

Dec 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005aas...20716401t&link_type=abstract

American Astronomical Society Meeting 207, #164.01; Bulletin of the American Astronomical Society, Vol. 37, p.1423

Astronomy and Astrophysics

Astronomy

Scientific paper

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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