Mass Loss From Stars in Globular Clusters

Details Mass Loss From Stars in Globular Clusters Mass Loss From Stars in Globular Clusters

Jun 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005sptz.prop20438b&link_type=abstract

Spitzer Proposal ID #20438

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Scientific paper

Evolved stars reveal the presence of mass-loss through their excess 10um emission, which comes from silicate grains that are heated in slow stellar winds. This has been a lively research area for nearby field giants, but with Spitzer, mass loss finally can be studied in globular clusters, systems with well-defined ages and metallicities. We propose to measure the strength of the silicate emission as a function of metallicity and age for selected globular clusters in the Milky Way and the LMC. These measurements will yield the cluster-wide stellar mass loss rates, a critical test of stellar evolutionary models. Of equal importance, these observations will enable us to age-date early-type galaxies, breaking the age-metallicity degeneracy that plagues the other main method.

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