Astronomy Colloquium for 2024-04-10

Series: Astronomy Colloquium
Date: Wednesday 10-Apr-2024
Time: 16:05-17:00 (4:05-5:00 pm)
Location: ATL 2400
Speaker: Dr. Charlotte Olsen (CUNY)
Title: Exploring environment and galaxy evolution with dwarf galaxy star formation histories

Our understanding of galaxy evolution is often hindered by the complexity of the processes that drive it. Star formation offers a powerful tool for tracing galaxy growth, and star formation history (SFH) reconstruction techniques make this even more powerful by allowing us to probe backwards in cosmic time. With spatial information, we can test correlations within populations, pairs, and within regions of a galaxy. When studied jointly, correlations between SFHs can provide insights into large scale environmental influences, local feedback mechanisms, and other drivers of galaxy evolution. I will discuss how this analysis has led to surprising discoveries in Local Volume dwarf galaxies as well as showing work that leverages resolved observations to trace the build up of stars within galaxies. The demonstrated versatility of SFHs as a tool for exploring galaxy evolution makes the vast amount of data from the Vera C. Rubin Observatory’s Legacy Survey of Space and Time (LSST) the perfect laboratory for learning how galaxies interact with their environment. We are currently using the state of the art NewHorizons simulation to predict how galaxy interactions with environment may be detected in LSST.

In-person colloquia are usually preceded by espresso and ice cream at 1:45 pm outside room PSC 1150 and are followed by an informal reception at 5:15 pm in that room. Anyone interested in talking with the speaker, or being added to the colloquium announcement email list, should contact the colloquium organizer Dr. Leslie Sage. Lunch will normally be reserved for the speaker to talk to graduate students. Anyone asking a question during a talk is asked to raise their hand and be acknowledged before speaking. Contact Dr. Leslie Sage for details.

Colloquium Organizer: Dr. Leslie Sage


Special accommodations for individuals with disabilities can be made by calling (301) 405-3001. It would be appreciated if we are notified at least one week in advance.


Directions and information about parking can be found here.

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