Computer Science
Scientific paper
Aug 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007noao.prop...22s&link_type=abstract
NOAO Proposal ID #2007B-0022
Computer Science
Scientific paper
We propose to use the CTIO 0.9m telescope to obtain deep BVRI imaging for the fall targets in a large sample of nearby, normal spiral galaxies, for which multi-wavelength velocity fields will also be derived. The spring targets of the sample will be imaged at the CTIO- 0.9m in late April, through NOAO time allocated in semester 2007A. The requested broadband imaging is essential for characterizing the stellar morphology, baryonic mass-to-light ratio and disk geometry in each target, while the spectroscopic observations probe the total mass distribution therein. Detailed mass models of the resulting photometry and kinematics will quantify the importance of asymmetries and projection effects on the dark matter halo profiles inferred for each system, and self-consistent realizations of the optimal fits will mitigate the degeneracy between the dark and luminous components. Our observational program will thus yield tight constraints on the halo profiles of nearby spirals in a key test of the canonical Cold Dark Matter paradigm on galaxy scales.
Sellwood Jerry A.
Spekkens Kristine
Williams Ted B.
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