NOAO > Observing Info > Approved Programs > 2006A-0030
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NOAO > Observing Info > Approved Programs > 2006A-0030 |
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PI: Sara Ellison, University of Victoria, sarae@uvic.ca
Address: Physics Department, 3800 Finnerty Rd, Victoria, BC V8P 1A1, Canada
CoI: Jessica Rosenberg, CfA
CoI: Martin Zwaan, European Southern Observatory
Title: The Damped Lyman-alpha System -- Galaxy Connection: Clues from Local HI Galaxy Surveys
Abstract:
Damped Lyman-alpha systems (DLAs) trace the evolution of gas in
galaxies. However, whilst almost every theoretical model of chemical
evolution predicts that DLA metallicities should reach solar at z=0,
observed values are barely 1/10 this value. One explanation for this is
that the HI cross-section of the gas-rich galaxy population is not
dominated by solar metallicity gas. We propose to use the relationship
between stellar mass and metallicity to make an estimate of the HI cross-
section weighted metallicity for a sample of local analogs to the DLA
population. To achieve this, we need J, H and K-band observations to
determine galactic stellar masses for 27 galaxies in our sample which do
not appear in the 2MASS 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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NOAO > Observing Info > Approved Programs > 2006A-0030 |
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