Deriving physical parameters of M31 star clusters using the PHAT survey .
Abstract
This work presents the derivation of the physical parameters of 1287 M31 star clusters using the catalog of the Panchromatic Hubble Andromeda Treasury survey. The star cluster parameters are derived using a large grid of star cluster models, generated with stochastically populated IMF, that are compared to the integrated broad-band WFC3+ACS photometry of the observed clusters. We derive the age, mass, and extinction of the sample of M31 star clusters with fixed solar metallicity. For clusters older than 1 Gyr, we also derive the metallicity. For globular clusters, we show that the metallicity derived is in good agreement with the metallicity previously derived using spectroscopy in literature.
- Publication:
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Memorie della Societa Astronomica Italiana
- Pub Date:
- 2016
- Bibcode:
- 2016MmSAI..87..683D
- Keywords:
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- galaxies: individual: M31;
- galaxies: star clusters: general