exoplanets and exomoons

I'm interested in improving our ability to detect the smallest exoplanets (and potentially exomoons!) in high-precision photometry. I've worked on an extension of the celerite method ( Foreman-Mackey et al., 2017) to two dimensions in order to model stellar flicker noise in multiple bands. This enables us to do a better job of separating the star's noise from the transit signal.
One application of this noise model is to the search for exomoons. I'm currently working to understand the capabilities of JWST to search for transiting exomoons, and hoping to publish on that topic soon.

code // paper

stellar rotation

Knowing the age of a star is important for understanding stellar evolution, investigating star formation histories, and studying their planets. Because stars lose angular momentum over time, we can estimate their ages by measuring their rotational periods. I've used a Gaussian processes to model light curves and measure stellar rotation periods for thousands of K2 targets. Our sample shows strong evidence of a bimodal period distribution which we interpret as indicative of a broken spindown law.

paper