Marshall C. Johnson

Marshall C. Johnson studies exoplanets—planets orbiting stars beyond our solar system—with a focus on how their orbits are tilted or aligned relative to their host stars' spin, and on characterizing planetary atmospheres using high-resolution spectroscopy. Much of the recent work involves large surveys (such as SOYSAUCE and PEPSI-based projects) that measure orbital alignment in young planetary systems and study atmospheric composition and escape in giant, hot planets like hot Jupiters. This research combines ground-based telescope observations with data from missions like TESS to find, confirm, and study these distant planetary systems.

Publication output has fluctuated over the last decade with a dip around 2020-2021, followed by a resurgence to a fairly steady average of about 13 papers per year over the last five years.

Generated by claude-sonnet-5 from public bibliographic data · Jul 20, 2026