NOAO >   Observing Info >   Approved Programs >   2000B-0032

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Proposal Information for 2000B-0032


PI: Gerhardt R. Meurer, The Johns Hopkins University, meurer@pha.jhu.edu
Address: 34th and Charles Streets, Baltimore, MD 21218, USA

CoI: Henry Ferguson, STScI
CoI: Rachel Webster, University of Melbourne
CoI: Rob Kennicutt, Steward Observatory
CoI: Patricia Knezek, STScI
CoI: Sally Oey, STScI
CoI: Chris Smith, NOAO/CTIO
CoI: M. Drinkwater, University of Melbourne
CoI: K. Freeman, RSAA, The Australian National University
CoI: V. Kilborn, University of Melbourne
CoI: M. Putman, RSAA, The Australian National University
CoI: L. Staveley-Smith, Australia Telescope National Facility

Title: Star Formation in H\sc i Selected Galaxies

Abstract: Cosmological evolution is mapped using tracers of star formation. Usually the selection of tracers is biased by stellar luminosity. We propose to determine star formation properties of a sample selected free of the stellar bias: by gas content from the \HIPASS survey. Since an interstellar medium is a prerequisite for star formation, our survey will uniformly sample all galaxies that could form stars, and hence provide a fair view of the local star formation demographics. The sample will consist of the 500 \HIPASS galaxies, each of which will be imaged in H(alpha) and the stellar continuum. Integrated, this yields the local star formation rate density, which will be used as benchmark to estimate the bias in other \Halpha samples. This survey will also provide high resolution images of the star formation morphology over a wide range of galaxies, particularly towards irregular dwarfs which are often missed in other studies. The \HI content of galaxies combined with the SFR will be used to predict the evolution of the \HI mass function and the epoch when the cosmological gas tank runs dry.


National Optical Astronomy Observatory, 950 North Cherry Avenue, P.O. Box 26732, Tucson, Arizona 85726, Phone: (520) 318-8000, Fax: (520) 318-8360



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