Other
Scientific paper
Aug 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002noao.prop..354l&link_type=abstract
NOAO Proposal ID #2002B-0354
Other
Scientific paper
Faint radio galaxies discovered in deep VLA survey fields, as opposed to their AGN-dominated powerful radio galaxy cousins, are dominated by luminous disk galaxies at z< 1 with a high merger and interaction fraction. The radio emission is likely produced by star- forming regions and resulting supernova remnants, so radio-selected galaxies are important dust-insensitive tracers of global star formation rates and galaxy and merger rate evolution. We propose spatially- resolved spectroscopy with the GMOS IFU of eight micro-Jy radio galaxies at 0.4< z< 1.0 to measure their internal kinematics. For six of them we have deep HST+WFPC2 images, and for all of them we have Keck spectra and optical and near-IR images. With IFU spectra, we will address the following science questions: (1) What are the internal velocity fields of these starburst galaxies, and are they consistent with merging and/or interacting systems? (2) What are the masses of micro-Jy galaxies implied by dynamical measures? (3) Are these radio-selected galaxies identical to optically-selected galaxies, or are they preferentially dust-reddened, disturbed, higher or lower metallicity, or otherwise dissimilar?
Koo David
Lowenthal James
Roche Nathan
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