AAS 207th Meeting, 8-12 January 2006
Session 69 Stellar Evolution
Poster, Tuesday, 9:20am-6:30pm, January 10, 2006, Exhibit Hall

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[69.05] RR Lyrae Variables in M33

A. Sarajedini, M. K. Barker (U. of Florida), D. Geisler (U. de Concepcion), P. Harding (Case Western), R. Schommer (NOAO/CTIO)

We have obtained HST/ACS imaging of two fields toward the disk of the Local Group spiral galaxy M33 in the F606W and F814W filters. These observations cover a sufficiently long baseline to allow the identification of some 70 RR Lyrae variables in M33. We use these stars to estimate the distance to M33, study the extinction properties of M33's disk, and identify a population of halo field stars in M33. Our results in these areas will be presented.

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