TY - JOUR
T1 - New periodograms separating orbital radial velocities and spectral shape variation
AU - Binnenfeld, A.
AU - Shahaf, S.
AU - Anderson, R. I.
AU - Zucker, S.
N1 - Publisher Copyright:
©
PY - 2022/3/1
Y1 - 2022/3/1
N2 - 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.
AB - 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.
KW - Methods: statistical
KW - Planets and satellites: detection
KW - Pulsars: individual: S Muscae
KW - Stars: individual: β Dorado
KW - Stars: oscillations
KW - Techniques: spectroscopic
UR - http://www.scopus.com/inward/record.url?scp=85127437840&partnerID=8YFLogxK
U2 - 10.1051/0004-6361/202141406
DO - 10.1051/0004-6361/202141406
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AN - SCOPUS:85127437840
SN - 0004-6361
VL - 659
JO - Astronomy and Astrophysics
JF - Astronomy and Astrophysics
M1 - A189
ER -