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| Paper: |
Star Formation Activity in Nearby Cluster Galaxies: Metallicity Change |
| Volume: |
451, 9th Pacific Rim Conference on Stellar Astrophysics |
| Page: |
225 |
| Authors: |
Kriwattanawong, W.; Mouhcine, M.; James P. A. |
| Abstract: |
The optical/near-infrared photometry of a sample of 72 galaxies in
nearby dynamically young cluster A1367, has been analyzed to derive
the stellar population properties. The sample galaxies are
distributed from the cluster centre out to approximately half the
cluster Abell radius. These galaxies exhibit a strong correlation
between integrated stellar mass and luminosity-weighted stellar
metallicity. Galaxies with signs of disturbed morphology and
ongoing star formation tend to have lower metallicity than passive
galaxies in the red sequence of similar stellar masses. This could
be due to tidally-driven gas inflows from the galaxy outskirts
toward the star-forming regions, carrying less enriched gas and
diluting the pre-existing gas to produce lower metallicity young
stellar populations than would be obtained prior to the interaction. |
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