SMC RR Lyr Abundances from Caby Photometry

Details SMC RR Lyr Abundances from Caby Photometry SMC RR Lyr Abundances from Caby Photometry

Dec 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aas...209.2905b&link_type=abstract

2007 AAS/AAPT Joint Meeting, American Astronomical Society Meeting 209, #29.05; Bulletin of the American Astronomical Society, V

Astronomy and Astrophysics

Astronomy

Scientific paper

The CTIO 4-m MOSAIC2 imager was used with the Ca and Stromgren b and y filters to examine RR Lyrae stars in two regions of the Small Magellanic Cloud. The regions are centered at (RA, Dec) values of (00:37:44, -73:08:12) and (01:02:23, -72:24:00). Preliminary processing of the frames was done using IRAF mscred, while photometry was obtained using Stetson’s DAOphot II and ALLSTAR. RR Lyr stars in the fields are identified from the list of variable stars in the SMC found by the MACHO project. The magnitudes are used to make two color indices, b-y and hk = Ca 2b + y. By locating these stars in the hk/b-y color-color diagram their chemical compositions are determined.

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