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The Stellar Populations of M33's Outer Regions IV: Inflow History and Chemical Evolution
Michael K. Barker, Ata Sarajedini
We have modelled the observed color-magnitude diagram (CMD) at one location in M33's outskirts under the framework of a simple chemical evolution scenario which adopts instantaneou…
Improved Cosmological Constraints from New, Old and Combined Supernova Datasets
M. Kowalski, D. Rubin, G. Aldering +67
We present a new compilation of Type Ia supernovae (SNe Ia), a new dataset of low-redshift nearby-Hubble-flow SNe and new analysis procedures to work with these heterogeneous compi…
The Stellar Populations of M33's Outer Regions II: Deep ACS Imaging
Michael K. Barker, Ata Sarajedini, Doug Geisler +2
Studying the stellar populations in the outskirts of spiral galaxies can provide important constraints on their structure, formation, and evolution. To that end, we present VI phot…
Newly Identified Star Clusters in M33. I. Integrated Photometry and Color-Magnitude Diagrams
Ata Sarajedini, M. K. Barker, Doug Geisler +2
We present integrated photometry and color-magnitude diagrams (CMDs) for 24 star clusters in M33, of which 12 were previously uncataloged. These results are based on Advanced Camer…