Using RR Lyrae Stars to Proble the M33 Halo

Details Using RR Lyrae Stars to Proble the M33 Halo Using RR Lyrae Stars to Proble the M33 Halo

Dec 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aas...209.2902p&link_type=abstract

2007 AAS/AAPT Joint Meeting, American Astronomical Society Meeting 209, #29.02; Bulletin of the American Astronomical Society, V

Astronomy and Astrophysics

Astronomy

Scientific paper

M33 appears to have a small field halo population. With most of its globular clusters being younger and more metal-rich than the Milky Way's halo clusters, this suggests that mergers played a minor role in its past. We have taken observations of three fields along the SE minor axis of M33 to search for RR Lyrae stars and use these variable stars to determine whether they belong to the disk or the halo. We present the RR Lyrae stars we have detected and discuss their distribution in M33.

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