English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

This study is the third of a series that investigates the degeneracy andstochasticity problems present in the determination of physical parameters suchas age, mass, extinction, and metallicity of partially resolved or unresolvedstar cluster populations situated in external galaxies when using broad-bandphotometry. This work tests the derivation of parameters of artificial starclusters using models with fixed and free metallicity for the WFC3+ACSphotometric system. Then the method is applied to derive parameters of a sampleof 203 star clusters in the Andromeda galaxy observed with the HST. FollowingPapers I \& II, the star cluster parameters are derived using a large grid ofstochastic models that are compared to the observed cluster broad-bandintegrated WFC3+ACS magnitudes. We derive the age, mass, and extinction of thesample of M31 star clusters with one fixed metallicity in agreement withprevious studies. Using artificial tests we demonstrate the ability of theWFC3+ACS photometric system to derive the metallicity of star clusters. We showthat the metallicity derived using photometry of 36 massive M31 star clustersis in a good agreement with the metallicity previously derived usingspectroscopy taken from literature.

Deriving physical parameters of unresolved star clusters III. Application to M31 PHAT clusters