Optical Follow-up of HIPASS Sources: Characterizing the Local Universe

Details Optical Follow-up of HIPASS Sources: Characterizing the Local Universe Optical Follow-up of HIPASS Sources: Characterizing the Local Universe

Feb 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999noao.prop...13k&link_type=abstract

NOAO Proposal ID #1999A-0013

Computer Science

Scientific paper

We propose to use the Curtis Schmidt telescope to continue our broadband (BVRI) optical follow-up observations of the extragalactic HI survey of the southern sky being done with the Parkes multibeam instrument. The HI Parkes All-Sky Survey, or HIPASS, will be the first survey to fully sample the (lambda)21 cm sky out to z ~ 0.01. Previously, only ~ 1% of this volume had been sampled. The optical B and R surface photometry of target objects identified in the HIPASS will allow us to identify optical counterparts, as well as to determine mass to light ratios, stellar populations, and optical morphologies. With the large field of view provided by the Curtis Schmidt, we can combine the HI and optical data to study the target objects' local environments, and to locate any truly isolated HI clouds. Furthermore, we are now beginning to take advantage of this large field of view to use V and I to search for optical counterparts to HI detections behind the Zone of Avoidance. Ultimately, these observations will provide the first true measure of the contribution of gas-rich dwarfs and giant galaxies to the galaxy luminosity and mass functions in the local universe, and when combined with optical and near-infrared survey projects, contribute to a more complete picture of the large- scale mass distribution of galaxies.

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