# New periodograms separating orbital radial velocities and spectral shape variation

@article{Binnenfeld2021NewPS,
title={New periodograms separating orbital radial velocities and spectral shape variation},
author={Avraham Binnenfeld and Sahar Shahaf and Richard I. Anderson and Shay Zucker},
journal={Astronomy \& Astrophysics},
year={2021}
}
• Published 3 November 2021
• Physics
• Astronomy & Astrophysics
We present new periodograms that are e ﬀ ective in distinguishing Doppler shift from spectral shape variability in astronomical spectra. These periodograms, building upon the concept of partial distance correlation, separate the periodic radial velocity modulation induced by orbital motion from that induced by stellar activity. These tools can be used to explore large spectroscopic databases in search of targets in which spectral shape variations obscure the orbital motion; such systems include…

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