NOAO >   Observing Info >   Approved Programs >   2006A-0576

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Proposal Information for 2006A-0576


PI: Emily MacDonald, National Optical Astronomy Observatory, ecm@noao.edu
Address: SCI, 950 north Cherrry Avenue, Tucson, Arizona 85716, USA

CoI: Mark Dickinson, National Optical Astronomy Observatory
CoI: Bahram Mobasher, Space Telescope Science Institute
CoI: Paul Allen, Australian National University
CoI: Casey Papovich, Steward Observatory

Title: Star Formation at z ~ 1

Abstract: We propose using FLAMINGOS in MOS mode to obtain near-infrared spectra of ~ 200 GOODS galaxies at z ~ 1, using the 4-m telescope on Kitt Peak. This will, for the first time, provide a sample of sufficient size to allow for a statistically sound analysis of the star formation rate at z ~ 1; a crucial epoch in the star formation history of the Universe. Several controversial issues will be addressed using this dataset. H(alpha), used routinely as a local star formation indicator, will be directly measured in order to determine the global star formation rate at z ~ 1, where many conflicting results exist. Star formation rates derived from the H(alpha) emission will also be used to calibrate star formation derived from existing MIPS 24 (mu) m data, equivalent at z ~ 1 to 12 (mu) m rest frame emission, which is caused by PAHs and warm, small-grain thermal continuum. Finally, star formation estimates from the most commonly used indicators, namely H(alpha), [OII], radio, UV and PAH features, will be compared and assessed. Line ratios from features in the FLAMINGOS near-IR and recently obtained Keck optical spectra will allow for the quantification of extinction and metallicity.


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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