Jessi Cisewski-Kehe - Colloquium Speaker

Assistant Professor, Department of Statistics, University of Wisconsin - Madison
Thursday, November 9, 2023 - 3:30pm
Colloquium Title: 
Uncovering Hidden Worlds: Detecting Another Earth Amidst Stellar Variability
Meet and Greet at 3:00 pm in 241 SH / Talk at 3:30 pm in 61 SH


Thousands of exoplanets have been discovered contributing to an improved understanding of our universe. However, a critical challenge remains related to the limited number of low-mass exoplanet detections. When a planet has a low mass (akin to the mass of the Earth or lower), the small signal is difficult to detect. Furthermore, stellar activity may hide a planetary signal or mimic a planetary signal leading to false detections. Though a variety of methods have been developed to address these challenges, a sufficient and general methodology to uncover the population of low-mass exoplanets is not available. During this presentation, I plan to discuss the statistical challenge in the detection of low-mass exoplanets in the presence of stellar activity using extreme precision radial velocity spectra and introduce statistical methodology that has potential to address this challenge by focusing on absorption line modeling. General comments about the field of astrostatistics and how to get involved will also be discussed.