Stellar Populations in M31: Resolved V,I Photometry of Five Halo Globular

Details Stellar Populations in M31: Resolved V,I Photometry of Five Halo Globular Stellar Populations in M31: Resolved V,I Photometry of Five Halo Globular

May 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995aj....109.2050c&link_type=abstract

Astronomical Journal v.109, p.2050

Astronomy and Astrophysics

Astronomy

21

Galaxies: Individual: M31, Galaxies, Abundances, Galaxies: Nuclei, Globular Clusters: General

Scientific paper

We present V,I CCD photometry of individual stars in five halo globular clusters in M31. For four clusters, the CMD shows a well-defined giant branch whose morphology is consistent with the metallicity estimates from spectroscopy of the clusters integrated light. An area of ˜10 square arcmin of the halo of M31 has also been analyzed. The mean halo metallicity is [Fe/H]˜-0.5 with a large dispersion σ[Fe/H]˜.5 dex. The distance modulus has also been estimated as (m-M)0=24.5±0.2, close to the more usual value of (m-M)0˜24.3.

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