Keywords
Galaxy: halo
globular clusters: general
globular clusters: individual (NGC 7078)
techniques: photometric
globular clusters: general
globular clusters: individual (NGC 7078)
techniques: photometric
Abstract
We present CCD observations of the galactic globular cluster M15, in the B and V filters. The cluster was reasonably covered, except in its northern region where our observations present a gap. We obtained a Hertzsprung-Russell (HR) diagram for each region observed, and later we produced a combined HR diagram containing more than 3000 stars. We generate a clean Colour Magnitude Diagram (CMD) and a Super Fiducial Line (SFL). Application of several methods and isochrone fitting leads us to obtain values for the metallicity [Fe/H]_{M15} ∼ -2.16±0.10, the reddening E(B-V)_{M15} ∼ 0.11±0.03, and a distance modulus of [(m-M)_0]_{M15} ∼ 15.03.Similar Articles
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