Deep CCD DDO Photometry of M15 and M71 Globular Clusters

Details Deep CCD DDO Photometry of M15 and M71 Globular Clusters Deep CCD DDO Photometry of M15 and M71 Globular Clusters

Dec 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005aas...20712816r&link_type=abstract

American Astronomical Society Meeting 207, #128.16; Bulletin of the American Astronomical Society, Vol. 37, p.1374

Astronomy and Astrophysics

Astronomy

Scientific paper

We present new DDO photometry of M15 and M71 globular clusters. We present these data through color magnitude diagrams (CMDs) using the DDO 38, 41, 42, and 51 filters in combination with UBVRCI_C colors. Our CMDs reach ≈ 2 magnitudes below each cluster's main sequence turnoff. We will compare the red giant branch (RGB), the subgiant branch (SGB), and the main sequence turnoff parameters for each cluster's CMD. The effects of any CN anamolies in the RGB and SGB will be highlighted, and the influence of surface gravity via the DDO 51 band will be discussed. This data will give preliminary results for new globular cluster isochrone-age and metallicity templates in the UBVRCI_C and DDO systems.

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