Astrophysical and Planetary Sciences Colloquium

Monday, October 30, 2023 at 12:15-1:15 pm

JILA auditorium

Dr. Kartheik Iyer, NASA Hubble Fellow

"Galaxies in the Making: Recent Advances in Understanding the Star Formation Histories of Galaxies"

A Pretty Image from the Talk


Star formation histories (SFHs) encode the rich and complex evolution of galaxies over cosmic time. In recent years, we have made significant progress in understanding SFHs, thanks to a combination of new observational data, theoretical insights, and advances in machine learning. In this talk, I will focus on: (i) how we infer SFH information from observations, for both individual objects and ensembles of galaxies, (ii) how we can use cosmological simulations to understand the connections between star formation and the underlying physical processes by studying variability (or 'burstiness') on different timescales, and (iii) the role of novel methods at the intersection of astrostatistics and machine learning to tackle challenges posed by large datasets from current and upcoming observatories. I will conclude with a zoomed out view of the landscape of galaxy evolution research enabled by JWST, and the many things to look forward to with Rubin, Roman, and Euclid in the years ahead!


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