216 citations · 1.8k across the 47 of their papers we have counts for
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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…
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…
A Gaussian Process Regression Reveals No Evidence for Planets Orbiting Kapteyn's Star
Anna Bortle, Hallie Fausey, Jinbiao Ji +3
Radial-velocity (RV) planet searches are often polluted by signals caused by gas motion at the star's surface. Stellar activity can mimic or mask changes in the RVs caused by orbit…
Modeling the quasiperiodic radial velocity variations of gamma Draconis
Victor Ramirez Delgado, Sarah Dodson-Robinson
gamma Draconis, a K5III star, showed radial velocity (RV) variations consistent with a 10.7 Jupiter mass planet from 2003-2011. After 2011, the periodic signal decayed, then reappe…
Protoplanetary Disk Science Enabled by Extremely Large Telescopes
Hannah Jang-Condell, Sean Brittain, Alycia Weinberger +36
The processes that transform gas and dust in circumstellar disks into diverse exoplanets remain poorly understood. One key pathway is to study exoplanets as they form in their youn…