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kima: Exoplanet detection in radial velocities

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arxiv 1806.08305 v1 pith:GMOBBFQS submitted 2018-06-21 astro-ph.IM astro-ph.EP

classification astro-ph.IMastro-ph.EP
keywords detectionkimasignalsexoplanetskeplerianpackageactivity-inducedanalysis
verification ladder T0 review T1 audit T2 compute T3 formal

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The radial-velocity (RV) method is one of the most successful in the detection of exoplanets, but is hindered by the intrinsic RV variations of the star, which can easily mimic or hide true planetary signals. kima is a package for the detection and characterization of exoplanets using RV data. It fits a sum of Keplerian curves to a timeseries of RV measurements and calculates the evidence for models with a fixed number Np of Keplerian signals, or after marginalising over Np. Moreover, kima can use a GP with a quasi-periodic kernel as a noise model, to deal with activity-induced signals. The hyperparameters of the GP are inferred together with the orbital parameters. The code is written in C++, but includes a helper Python package, pykima, which facilitates the analysis of the results.

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Forward citations

Cited by 6 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Three new exoplanet systems from the Dispersed Matter Planet Project

    astro-ph.EP 2026-08 conditional novelty 6.0 of 10

    DMPP-7 hosts a confirmed 0.72 Saturn-mass planet at P=4.93 days; HD 67200 and HD 2134 show moderate evidence for 2.7-2.8 day low-mass candidates that remain unconfirmed.

  2. TOI-3664 b, TOI-4034 b & TOI-6564 b: Three new hot Jupiters around stars approaching the terminal age main sequence

    astro-ph.EP 2026-06 unverdicted novelty 6.0 of 10

    TOI-3664 b, TOI-4034 b, and TOI-6564 b are three newly characterized hot Jupiters around terminal-age main-sequence stars, with sub-Jupiter masses and inflated radii.

  3. Understanding eccentric temperate giants: an in-depth study of the architecture and stellar obliquity of the TOI-2134 system

    astro-ph.EP 2026-07 unverdicted novelty 5.0 of 10

    Updated analysis of TOI-2134 with new TESS sectors and spectra confirms an inner mini-Neptune and outer eccentric sub-Saturn, measures their masses and radii, and reports a 59 degree obliquity for the outer planet via...

  4. ASTEP confirmation of a pair of long-period Jupiter-sized planets with extremely low densities transiting TOI-791

    astro-ph.EP 2026-06 unverdicted novelty 5.0 of 10

    Two extremely low-density Jupiter-sized planets on long-period orbits around TOI-791 were confirmed via ground-based photometry and TTV-derived masses.

  5. CORALIE radial-velocity search for companions around evolved stars (CASCADES) V. Three planetary companions and achievable precision

    astro-ph.EP 2026-06 unverdicted novelty 5.0 of 10

    Three massive planets detected around HD125136 (2.26 MJup, 850 d) and HD127195 (0.66 and 0.78 MJup, 535 d and 834 d) via Bayesian Keplerian modeling of CORALIE RV series; one additional signal attributed to activity.

  6. The impact of interpolation in high-resolution spectroscopy -- The overlooked role of interpolation in radial velocity extraction

    astro-ph.EP 2026-06 conditional novelty 4.0 of 10

    Interpolation algorithm choice in template-based RV extraction from high-resolution spectra introduces systematic biases reaching 20-25 m/s in low-SNR cases and under 0.2 m/s when BERV variation is large, demonstrated...

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