New periodograms separating orbital radial velocities and spectral shape variation

A. Binnenfeld*, S. Shahaf, R. I. Anderson, S. Zucker

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


We present new periodograms that are effective 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 active planet-hosting stars or binary systems with an intrinsically variable component. We provide a detailed prescription for calculating the periodograms, demonstrate their performance via simulations and real-life case studies, and provide a public Python implementation.

Original languageEnglish
Article numberA189
JournalAstronomy and Astrophysics
StatePublished - 1 Mar 2022


  • Methods: statistical
  • Planets and satellites: detection
  • Pulsars: individual: S Muscae
  • Stars: individual: β Dorado
  • Stars: oscillations
  • Techniques: spectroscopic


Dive into the research topics of 'New periodograms separating orbital radial velocities and spectral shape variation'. Together they form a unique fingerprint.

Cite this