Resolving the Red Giant Population in Early Type Galaxies

Details Resolving the Red Giant Population in Early Type Galaxies Resolving the Red Giant Population in Early Type Galaxies

Jul 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004hst..prop10413g&link_type=abstract

HST Proposal ID #10413

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Hst Proposal Id #10413 Stellar Populations

Scientific paper

This project addresses the fundamental issue of the age and abundance of the stellar populations in early type galaxies. We propose deep imaging observations with ACS/WFC in F606W, F814W, and NICMOS/NIC2 in F110W, F160W to create optical/IR color-magnitude diagrams of the upper red giant branch in the nearest example of a bona fide elliptical galaxy, NGC3379, and simultaneously in the disk and halo of its companion, the S0 galaxy NGC3384. These observations will build upon the results from our NICMOS study of NGC3379, which produced the first deep IR color-magnitude data for a normal, luminous elliptical galaxy. This is the most direct way to establish the metallicity, metallicity spread, and presence of intermediate age populations in these representative Hubble types, exploring their star formation histories and evolution. The data will enable comparison with M32, the M31 halo, NGC5128, and other nearby galaxies similarly observed with HST.

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