nuance: Efficient detection of planets transiting active stars Article Swipe
L. J. Garcia
,
Daniel Foreman-Mackey
,
C. A. Murray
,
S. Aigrain
,
Dax L. Feliz
,
F. J. Pozuelos
·
YOU?
·
· 2024
· Open Access
·
· DOI: https://doi.org/10.48550/arxiv.2402.06835
YOU?
·
· 2024
· Open Access
·
· DOI: https://doi.org/10.48550/arxiv.2402.06835
The detection of planetary transits in the light curves of active stars, featuring correlated noise in the form of stellar variability, remains a challenge. Depending on the noise characteristics, we show that the traditional technique that consists of detrending a light curve before searching for transits alters their signal-to-noise ratio, and hinders our capability to discover exoplanets transiting rapidly-rotating active stars. We present nuance, an algorithm to search for transits in light curves while simultaneously accounting for the presence of correlated noise, such as stellar variability and instrumental signals. We assess the performance of nuance on simulated light curves as well as on the TESS light curves of 438 rapidly-rotating M dwarfs. For each dataset, we compare our method to 5 commonly-used detrending techniques followed by a search with the Box-Least-Square algorithm. Overall, we demonstrate that nuance is the most performant method in 93% of cases, leading to both the highest number of true positives and the lowest number of false positive detections. Although simultaneously searching for transits while modeling correlated noise is expected to be computationally expensive, we make our algorithm tractable and available as the JAX-powered Python package nuance, allowing its use on distributed environments and GPU devices. Finally, we explore the prospects offered by the nuance formalism, and its use to advance our knowledge of planetary systems around active stars, both using space-based surveys and sparse ground-based observations.
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Metadata
- Type
- preprint
- Language
- en
- Landing Page
- http://arxiv.org/abs/2402.06835
- https://arxiv.org/pdf/2402.06835
- OA Status
- green
- Related Works
- 10
- OpenAlex ID
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All OpenAlex metadata
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https://openalex.org/W4391800516Canonical identifier for this work in OpenAlex
- DOI
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https://doi.org/10.48550/arxiv.2402.06835Digital Object Identifier
- Title
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nuance: Efficient detection of planets transiting active starsWork title
- Type
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preprintOpenAlex work type
- Language
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enPrimary language
- Publication year
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2024Year of publication
- Publication date
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2024-02-09Full publication date if available
- Authors
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L. J. Garcia, Daniel Foreman-Mackey, C. A. Murray, S. Aigrain, Dax L. Feliz, F. J. PozuelosList of authors in order
- Landing page
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https://arxiv.org/abs/2402.06835Publisher landing page
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https://arxiv.org/pdf/2402.06835Direct link to full text PDF
- Open access
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YesWhether a free full text is available
- OA status
-
greenOpen access status per OpenAlex
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https://arxiv.org/pdf/2402.06835Direct OA link when available
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Planet, Stars, Exoplanet, Astronomy, Astrobiology, Physics, AstrophysicsTop concepts (fields/topics) attached by OpenAlex
- Cited by
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0Total citation count in OpenAlex
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10Other works algorithmically related by OpenAlex
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