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Events on Thursday, April 25th, 2024

R. G. Herb Condensed Matter Seminar
Title to be announced
Time: 10:00 am
Place: 5310 Chamberlin
Speaker: Peter Schmelcher, U Hamburg
Host: Mark Saffman
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Preliminary Exam
Progress towards cooling and imaging on an alkali atom forbidden transition
Time: 11:00 am - 1:00 pm
Place: Sterling Hall B343
Speaker: Jacob Scott, Physics PhD Graduate Student
Abstract: I present progress towards atomic manipulation on the 6S1/2 - 5D5/2 forbidden transition in Cs. I discuss a few intriguing features of this transition, including a very high pump-depump ratio, very low Doppler temperature, and an intermediate state that allows for background free imaging. I also discuss development of the experimental apparatus and preliminary results of the experiment.
Host: Mark Saffman
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NPAC (Nuclear/Particle/Astro/Cosmo) Forum
NOvA cross section measurements
Time: 2:30 pm - 3:30 pm
Place: 5310 Chamberlin Hall
Speaker: Prabhjot Singh, Queen Mary University of London
Abstract: tbd
Host: Brian Rebel
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Astronomy Colloquium
Goodbye to “Chi-by-Eye” : Results from a Bayesian Analysis of Photometric Binaries in Open Clusters
Time: 3:30 pm - 4:30 pm
Place: 4421 Sterling Hall
Speaker: Aaron M Geller, Northwestern University
Abstract: Binary and higher-order multiple stars are ubiquitous, and their evolution can be dramatically influenced by their environment. Binaries in the field evolve essentially in isolation, while those within star clusters may experience frequent close stellar encounters that can significantly modify, and even disrupt, their orbits. Most stars like our Sun are believed to be born in star clusters, many of which dissolve to populate the field. Therefore, our interpretation of the observed binary populations in star clusters and the field (and even to some extent our understanding of star formation), relies on how a population of stars evolves through this more dynamically active stage in a star cluster. In this talk, I will provide an overview of the work my team and collaborators are pursuing to identify and analyze photometric binaries in galactic open clusters, in order to test predictions of star cluster models and learn about the dynamical state of our galactic open cluster population.
Host: Ke Zhang
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