Computer Science
Scientific paper
Aug 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000noao.prop..374m&link_type=abstract
NOAO Proposal ID #2000B-0374
Computer Science
Scientific paper
Two recently developed observational techniques allow us to test the rapidly evolving models of galaxy formation and evolution. Advances in CCD surface photometry help us study even the faintest stellar populations of nearby disk galaxies and make meaningful comparisons with the Milky Way possible. In addition, planetary nebulae (PNe), which are tracers of older populations, provide an opportunity to study the kinematics of these faint populations for the first time. While our ultra-deep surface photometry of edge-on disk galaxies has successfully detected the faint thick disk populations in nearby galaxies, the photometry alone cannot always distinguish between a rotationally- supported thick disk and a pressure-supported halo. We have assembled a sample of nearby (distance ≤ 15 Mpc) edge-on disk galaxies from the UGC catalog for which we are requesting time on the KPNO 2.1m telescope to detect PNe with the aim of future kinematic study. The galaxies, generally of type Sb and later, are selected to have mass ≥ M33's. As a group, they provide us with a range of bulge-to-disk ratio, morphology and, importantly, surface brightness to investigate. This will be the first investigation of the stellar kinematics of low surface brightness galaxies. Our PN observations will also provide us with accurate distances to the galaxies in our sample.
Harding Paul
Hurley-Keller Denise
Morrison Heather
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