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Australian Human Resources Institute Diversity Awards 2013 Finalist

Dennis Zaritsky (Arizona)

"Evidence for Two Distinct Stellar Initial Mass Functions"

Abstract. On the basis of new observations that track the mass-to-light ratios of stellar clusters in the Local Group vs. age, we find that no single population model fits the entire population. Specifically, the data suggest that younger clusters (< few Gyr old) tend to favor a more bottom-heavy IMF and older clusters favor a less bottom-heavy IMF. Alternate interpretations will be discussed, but they are appear unlikely to explain the observations.

Held in the AAO Large Meeting Room (Room 1, Ground Floor, Building 3) at 11:00 AM on Wednesday, 05 September 2012