New periodograms separating orbital radial velocities and spectral shape variation

A. Binnenfeld; S. Shahaf; R. I. Anderson; S. Zucker

doi:10.1051/0004-6361/202141406

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 journal › Article › peer-review

8 Scopus citations

Abstract

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 language	English
Article number	A189
Journal	Astronomy and Astrophysics
Volume	659
DOIs	https://doi.org/10.1051/0004-6361/202141406
State	Published - 1 Mar 2022

Funding

Funders	Funder number
European Research Council
Tel Aviv University
Horizon 2020 Framework Programme	PCEFP2_194638, 947660
Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung	194638

Keywords

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

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10.1051/0004-6361/202141406

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title = "New periodograms separating orbital radial velocities and spectral shape variation",

abstract = "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.",

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note = "Publisher Copyright: {\textcopyright} ",

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doi = "10.1051/0004-6361/202141406",

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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

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SN - 0004-6361

VL - 659

JO - Astronomy and Astrophysics

JF - Astronomy and Astrophysics

M1 - A189

ER -

New periodograms separating orbital radial velocities and spectral shape variation

Abstract

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Keywords

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