216 citations · 1.8k across the 47 of their papers we have counts for
47 papers
High-Pass Filtering and Gaussian Process Regularization: Stellar Activity Characterization Techniques Applied to the 55 Cancri Planetary System
Justin Harrell, Sarah E. Dodson-Robinson
Doppler planet searches are complicated by stellar activity, through which cyclical changes in the host star's photosphere and chromosphere can mask or mimic planetary signals. A p…
Multitaper magnitude-squared coherence for time series with missing data: Understanding oscillatory processes traced by multiple observables
Sarah E. Dodson-Robinson, Charlotte Haley
To explore the hypothesis of a common source of variability in two time series, observers may estimate the magnitude-squared coherence (MSC), which is a frequency-domain view of th…
Optimal frequency-domain analysis for spacecraft time series: Introducing the missing-data multitaper power spectrum estimator
Sarah E. Dodson-Robinson, Charlotte Haley
While the Lomb-Scargle periodogram is foundational to astronomy, it has a significant shortcoming: the variance in the estimated power spectrum does not decrease as more data are a…
Twinkle -- a small satellite spectroscopy mission for the next phase of exoplanet science
Ian Stotesbury, Billy Edwards, Jean-Francois Lavigne +35
With a focus on off-the-shelf components, Twinkle is the first in a series of cost competitive small satellites managed and financed by Blue Skies Space Ltd. The satellite is based…
Magnitude-squared coherence: A powerful tool for disentangling Doppler planet discoveries from stellar activity
Sarah E. Dodson-Robinson, Victor Ramirez Delgado, Justin Harrell +1
If Doppler searches for earth-mass, habitable planets are to succeed, observers must be able to identify and model out stellar activity signals. Here we demonstrate how to diagnose…
The EXPRES Stellar Signals Project II. State of the Field in Disentangling Photospheric Velocities
Lily L. Zhao, Debra A. Fischer, Eric B. Ford +40
Measured spectral shifts due to intrinsic stellar variability (e.g., pulsations, granulation) and activity (e.g., spots, plages) are the largest source of error for extreme precisi…