Star Formation in Interacting Galaxies

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Presentation transcript:

Star Formation in Interacting Galaxies Ian Beagles Advisor: Dr. Lisa Chien Northern Arizona University Arizona space grant consortium symposium 2015

Overview Cluster ages provide insight into the star formation history of interacting galaxies Arp 256 Arp 299 IC 883

Overview Photometric analysis of star clusters gives their ages Determine cluster ages in three interacting galaxy pairs (Tremonti 2004)

Data Two images from Hubble Space Telescope One in visible at 435 nm and one in infrared at 814 nm Selected cluster candidates and performed photometry using IRAF Created color-magnitude diagrams for each galaxy

Arp 256 Dots represent each of the 222 cluster candidates Color lines represent the evolution of the clusters with different masses

Arp 299 Dots represent each of the 1078 cluster candidates

IC 883 Dots represent each of the 94 cluster candidates

Results Clusters in Arp 256 Clusters in Arp 299 Clusters in IC 883 Mass between 105 to 106 Mʘ Ages as young as 1 Myr Clusters in Arp 299 Mass between 103 to 105 Mʘ Clusters in IC 883 Mass between 104 to 105 Mʘ Ages of 100 Myr to 1 Gyr, with a few younger than 100 Myr

Any Questions? Acknowledgements I would like to thank: Dr. Lisa Chien NASA Space Grant Arizona Space Grant Consortium NAU Space Grant Any Questions?

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