NOAO > Observing Info > Approved Programs > 2006B-0100
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NOAO > Observing Info > Approved Programs > 2006B-0100 |
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PI: Stacy McGaugh, University of Maryland, ssm@astro.umd.edu
Address: Department of Astronomy, Computer \& Space Sciences Bldg, College Park, MD 20742, USA
CoI: Ted von Hippel, University of Texas
CoI: Matt Bershady, University of Wisconsin
CoI: Dave Silva, AURA/TMT
CoI: Kyle Westfall, University of Wisconsin
Title: Stellar Absorption Lines in Low Surface Brightness Galaxies
Abstract:
The stellar populations of low surface brightness (LSB) galaxies
tend to be quite blue. This has been attributed to a variety of causes,
including a late formation epoch, a great age but gradual evolution, or
even a variable IMF. So far, there are few constraints other than
colors, which are notoriously degenerate. To date there are no
continuum spectra for LSB galaxies with central surface brightness
fainter than 23 B mag/[]. What this problem requires is a highly
efficient, very large aperture spectrograph. The advent of the
efficient new VPH grating for the Bench Spectrograph combined with the
wide area coverage afforded by SparsePak provides a golden opportunity
for obtaining continuum spectroscopy of LSB galaxy disks by the
appropriately weighted co-addition of individual fiber spectra. Seeing
what spectral features are present would be a great step forward in
constraining the stellar content of these ephemeral galaxies.
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 > 2006B-0100 |
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