The Kiso/HK Objective-Prism Survey -- First Results from a Test Field Toward the High Velocity HI Cloud A1

Details The Kiso/HK Objective-Prism Survey -- First Results from a Test Field Toward the High Velocity HI Cloud A1 The Kiso/HK Objective-Prism Survey -- First Results from a Test Field Toward the High Velocity HI Cloud A1

May 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999aas...194.8413j&link_type=abstract

American Astronomical Society, 194th AAS Meeting, #84.13; Bulletin of the American Astronomical Society, Vol. 31, p.971

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Scientific paper

Deep objective-prism surveys are able to identify a number of interesting stars in the halo of the Milky Way galaxy, including metal-deficient stars, field horizontal-branch stars and halo blue stragglers, and carbon-enhanced metal-deficient stars. We have used the Kiso Schmidt telescope (with a 2 degree prism, resulting in a dispersion of 100 Angstroms /mm at ~ 4000 Angstroms ), and a 2K x 2K CCD detector, in combination with the HK filter previously used by Beers and colleagues for an extensive photographic prism survey, to obtain objective-prism spectra which reach an apparent magnitude limit of B ~ 18.5 over roughly a one square degree area of sky in the direction toward the High Velocity HI cloud A1. We discuss the results of our first test frames, and suggest a number of interesting candidate stars for further study at high spectral resolution. Field horizontal-branch stars identified in this study will be used to derive distance limits for the HVC A1, once the required high-dispersion spectra are obtained. Other High Velocity HI Clouds are presently being surveyed with this technique. This work has received partial support from grant AST 95-29454 awarded by the National Science Foundation.

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