Colour Magnitude Diagrams of Two - Metal-Rich Globular Clusters in M31

Details Colour Magnitude Diagrams of Two - Metal-Rich Globular Clusters in M31 Colour Magnitude Diagrams of Two - Metal-Rich Globular Clusters in M31

Jul 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995hst..prop.5907j&link_type=abstract

HST Proposal ID #5907

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Hst Proposal Id #5907 Stellar Populations

Scientific paper

We propose to observe one of the most metal-rich globular cluster ever found, G177, recently identified in M31. We wish to take deep images in V and I bands, taking advantage of the high spatial resolution and red sensitivity of the Planetary Camera of WFPC2/HST, in order to build their colour-magnitude diagrams. With respect to the outstanding properties of G177, we will address the questions of its metallicity, both in absolute scale, by confrontation with theoretical stellar evolutionary tracks, and in relative scale, by comparison with coeval observations of two other clusters, G1 and G170, used as standards. The data we propose to obtain would provide essential input for theories of stellar evolution, star formation history, and models of star cluster and galaxy formation.

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