NGC 6864 (M 75) :: new paper
“Multi-color photometry of the Galactic globular cluster M 75 = NGC 6864. A new sensitive metallicity indicator and the position of the horizontal branch in UV””
We carry out and analyze new multi-color photometry of the Galactic globular cluster (GC) M 75 in and focus on the brighter sequences of the color-magnitude diagram (CMD), with particular emphasis on their location in U-based CMD. Specifically, we study the level both of the horizontal (HB) and red giant branches (RGB) relative to the main-sequence turnoff (TO) in the U magnitude...
Published on: Astronomy and Astrophysics Vol. 469 No. 2 (July II 2007)