Rotation periods and orbital alignment
The night-to-night precision of Tierras allows us to measure the rotation periods of Sun-like stars. Combined with Rossiter-McLaughlin observations, these measurements can allow us to determine how the orbits of exoplanets align with their host stars’ spin axes, an important probe of system architecture and evolution.
With a night-to-night precision of 0.3%, we are able to easily resolve the rotation period of TOI-2364, an early-K dwarf with a sub-Saturn transiting exoplanet. Our observations reveal that TOI-2364 b is well-aligned with its host star’s spin axis (Tamburo et al. 2025).
Rotation periods of ultra-cool dwarfs
We are executing a survey to measure the rotation periods of very-low-mass stars and brown dwarfs within 15 pc, enabled by the near-infrared Tierras filter.
Confirmation of long-period transiting exoplanets
The night-to-night stability of Tierras allows us to confirm the existence of long-period transiting exoplanets without necessarily detecting ingress or egress.