NOAO >   Observing Info >   Approved Programs >   2012A-0282

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Proposal Information for 2012A-0282


PI: Robin Ciardullo, Penn State University, rbc@astro.psu.edu
Address: Astronomy Department, 525 Davey Lab, University Park, PA 16802, USA

CoI: Karl Gebhardt, University of Texas
CoI: Caryl Gronwall, Penn State University
CoI: Gary Hill, University of Texas
CoI: Sarah Tuttle, University of Texas
CoI: John Feldmeier, Youngstown State University
CoI: Alex Hagen, Penn State University

Title: An Imaging Survey for the Hobby-Eberly Telescope Dark Energy Experiment

Abstract: The Hobby-Eberly Telescope Dark Energy Experiment (HETDEX) will study the evolution of dark energy using the power-spectrum of ~ 800,000 Ly(alpha) emitting galaxies (LAEs) between 1.9 < z < 3.5. This survey, which will begin in Fall 2012, will use a large suite of integral-field units to obtain R ~ 800 spectra between 3500 \AA\ and 5500 Aover 300 deg^2 of sky (filling factor 1/4.5). Since whatever falls in the instrument's 34,000 1\farcs 5 diameter fibers will be recorded, the project will generate a unique, unbiased spectral database that extends several magnitudes deeper than the SDSS\null. Projects that can be done with the data range from probing the history of star-formation as a function of environment, to examining the processes of cluster formation, to measuring the frequency of extremely metal-poor halo stars. Complementary imaging is crucial for HETDEX, since continuum detections are needed to discriminate high redshift Ly(alpha) emitters from foreground [O II] sources. We therefore propose to use the Mosaic camera on the KPNO 4-m telescope to image those HETDEX fields which will be surveyed in the first year of the experiment. By using Mosaic to image the first year's strip now, we can assure quality control and science optimization during the critical initial phases of the survey.


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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