Research
My interests include the interiors and atmospheres of planets in and out of the solar system. I work to understand planets as classes of astrophysical objects. Mostly I'm a modeler and theorist, with a few additional observational projects.
Postdocs working with me: Natasha Batalha, Henriette Schwarz, Naor Movshovitz
Grad students working with me: Daniel Thorngren, Chris Mankovich, Kat Feng, Callie Hood, and Maggie Thompson
Former postdocs: Theodora Karalidi, Ty Robinson, Ian Crossfield, Mike Line, Kevin Moore, Vivien Parmentier, Nadine
Nettelmann, Eliza Kempton, Philip Nutzman
Former grad students: Neil Miller, Katie Morzinski, Eric Lopez, Caroline Morley, Mikey Nayak
- Thermal evolution models of extrasolar super Earths, giant planets, Jupiter, and Saturn. What is nature and composition of exoplanets? How do they cool over time and when are they easiest to detect? What is the current distribution of rock, iron, water, and possibly helium in their interiors, and how does this change with time? Do all giant planets possess cores of ice and rock, and what does this tell us about their formation? Can planets be tidally disrupted? There are now known to be thousands of planets that transit their parent star, allowing us to measure their radii, and often their masses, and densities.
- Calculations of the atmospheric structure and spectra of all kinds of planets. How do planetary atmospheres show us their planetary composition? How do planets maintain or lose their atmospheres? What is the day-night temperature contrast of tidally locked planets? What are the main molecular absorbers in these atmospheres? How well can we constrain the chemical abundances of these atmospheres with data from current and future telescopes? Currently I'm working from the Earth-mass to super-Jupiter mass regime.
- Emission spectra and cloud formation in the coolest brown dwarfs and planets. Astronomers can now find failed stars with temperatures between 500 K and Jupiter's 125 K. We're modeling clouds than range from the exotic (potassium chloride salt) to the common (water) that form in planets and brown dwarfs in this temperature range. I'm a member of the Gemini Planet Imager science team that is finding and characterizing cool planets around nearby young stars.