NOAO >   Observing Info >   Approved Programs >   2011A-0030

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Proposal Information for 2011A-0030


PI: John Salzer, Indiana University, slaz@astro.indiana.edu
Address: Astronomy Department, 727 E. Third Street, Swain West 319, Bloomington, IN 47405, USA

CoI: Angela Parker, Indiana University
CoI: Martha Haynes, Cornell University
CoI: Riccado Giovanelli, Cornell University
CoI: Eric Wilcots, University of Wisconsin

Title: Making Hay with ALFALFA: The Star-Formation Properties of an HI-Selected Galaxy Sample

Abstract: We are requesting time through the NOAO Survey Program to carry out an extensive program of narrow-band H(alpha) imaging. Our two primary goals are to derive the most accurate value possible for the local star- formation rate (SFR) density and to explore possible environmental impacts on galaxian star-formation properties. Both projects require large, unbiased samples of galaxies. Our target sample is drawn from ALFALFA, a blind HI survey being carried out using the Arecibo 305-m radio telescope. We argue that this HI-selected sample provides the best available catalog of sources to be used for measuring SFRs. We have constructed a \bf volume-limited sample of HI-detected objects (553 galaxies). Data for this new sample will be combined with the images from our ongoing narrow-band project currently taking place on the WIYN 0.9-m telescope to yield the largest (>1100), most comprehensive sample of H(alpha) images available beyond the Local Supercluster. We will also be able to use the survey data to address a number of important issues regarding galaxy evolution. All data from both projects will be made available to the community.


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



NOAO >   Observing Info >   Approved Programs >   2011A-0030

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