Stellar Content of Galaxies and Globular Clusters - Spectroscopy

Details Stellar Content of Galaxies and Globular Clusters - Spectroscopy Stellar Content of Galaxies and Globular Clusters - Spectroscopy

Jul 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991hst..prop.4694b&link_type=abstract

HST Proposal ID #4694

Computer Science

Hst Proposal Id #4694

Scientific paper

Our goal is to establish a spectroscopic method which can reliably distinguish the effects of age from those of chemical composition in the integrated light of stellar populations older than one billion years. This program forms an essential link between two of HST's most powerful capabilities: detailed color-magnitude diagram (CMD) studies of nearby galaxies and globular clusters, and integrated light studies of high redshift galaxies in early phases of evolution. As a first step, we propose to obtain high precision FOS ultraviolet spectroscopy of bright, nearby extragalactic systems, to combine this with ground-based and IUE data in a comprehensive spectral synthesis analysis, and to compare the results with independent CMD studies by HST. Our results will help us to develop an effective method for interpreting the lower S/N data which will be available for distant objects at large lookback times.

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