NOAO >   Observing Info >   Approved Programs >   2002A-0117

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Proposal Information for 2002A-0117


PI: Joshua Simon, University of California at Berkeley, jsimon@astro.berkeley.edu
Address: 601 Campbell Hall, Berkeley, CA 94720, USA

CoI: Adam Leroy, University of California at Berkeley
CoI: Alberto Bolatto, University of California at Berkeley
CoI: Leo Blitz, University of California at Berkeley

Title: \begincenter Probing Dwarf Galaxy Dark Matter Halos At High Resolution \endcenter

Abstract: We propose to complement our systematic millimeter-wave study of the molecular clouds in nearby low-mass galaxies with integral field optical spectroscopy at the WIYN telescope. We will use the DensePak array at its highest resolution (~ 15 km/s) to map the H(alpha) kinematics of several dwarf galaxies. With these two-dimensional optical data and our CO velocity fields we will construct rotation curves with 5\arcmin\arcmin (100-300 pc) resolution and 3 km/s\ velocity errors. These rotation curves will enable us to definitively test one of the generic predictions of Cold Dark Matter models: that dark matter halos have steeply cusped central density profiles. Our observations will offer up to an order of magnitude improvement in spatial resolution and a factor of ~3 in spectral resolution over most previous optical rotation curves. These observations will also be added to our millimeter-wave mapping of the target galaxies with the BIMA interferometer, optical photometry and spectroscopy at Lick Observatory, and submillimeter imaging with SCUBA on the JCMT to create an extensive multiwavelength dataset for each galaxy.


National Optical Astronomy Observatory, 950 North Cherry Avenue, P.O. Box 26732, Tucson, Arizona 85726, Phone: (520) 318-8000, Fax: (520) 318-8360



NOAO >   Observing Info >   Approved Programs >   2002A-0117

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