Other
Scientific paper
Jan 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aas...21715001a&link_type=abstract
American Astronomical Society, AAS Meeting #217, #150.01; Bulletin of the American Astronomical Society, Vol. 43, 2011
Other
Scientific paper
RR Lyrae variable stars are key distance indicators because they have a predictable period-luminosity relation. Previous surveys by the OGLE and MACHO collaborations have identified RR Lyrae stars within the Large Magellanic Cloud (LMC), but as the prime directive of these surveys was to search for gravitational lensing effects, precision photometry was not a primary concern. We have obtained accurate V and R photometry of a sub-sample of OGLE RR Lyrae located around the central bar. The results presented here encompass two of the twenty-six surveyed fields, one field on the far east side of the central bar and the other on the far west. Distances and reddening along the line of sight of 50 RR Lyrae can be used to map out the structure of the old stellar populations within the LMC. A comparison on the properties of the RR Lyrae in these two fields allow constraints to be made on the orientation of the LMC, and to place limits on the warping of the LMC disk.
Accetta Katherine
Kunder Andrea
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