Cepheid radial velocities vary by a few percent depending on the correlation template and fitting method, and a standardized catalogue of 64 stars shows centroid velocities give the most consistent results.
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Consistent radial velocities of classical Cepheids from the cross-correlation technique
Cepheid radial velocities vary by a few percent depending on the correlation template and fitting method, and a standardized catalogue of 64 stars shows centroid velocities give the most consistent results.