Deciphering stellar chorus: apollinaire, a Python 3 module for Bayesian peakbagging in helio- and asteroseismology

Abstract

Since the asteroseismic revolution, availability of efficient and reliable methods to extract stellar-oscillation mode parameters has been one of the keystone of modern stellar physics. In the helio- and asteroseismology fields, these methods are usually referred as peakbagging. We introduce in this paper the apollinaire module, a new Python 3 open-source Markov Chains Monte Carlo (MCMC) framework dedicated to peakbagging. The theoretical framework necessary to understand MCMC peakbagging methods for disk-integrated helio- and asteroseismic observations are extensively described. In particular, we present the models that are used to estimate the posterior probability function in a peakbagging framework. A description of the apollinaire module is then provided. We explain how the module enables stellar background, p-mode global pattern and individual-mode parameters extraction. By taking into account instrumental specificities, stellar inclination angle, rotational splittings, and asymmetries, the module allows fitting a large variety of p-mode models suited for solar as well as stellar data analysis with different instruments. After having been validated through a Monte Carlo fitting trial on synthetic data, the module is benchmarked by comparing its outputs with results obtained with other peakbagging codes. An analysis of the PSD of 89 one-year subseries of GOLF observations is performed. Six stars are also selected from the Kepler LEGACY sample in order to demonstrate the code abilities on asteroseismic data. The parameters we extract with apollinaire are in good agreement with those presented in the literature and demonstrate the precision and reliability of the module.

26 pages, 15 figures, accepted in A&A. This version modifies a typo in the abstract that was incorrectly rendered in v2

References in corpus (30)

• Array Programming with NumPy
• The Transiting Exoplanet Survey Satellite
• The K2 Mission: Characterization and Early results
• Standing on the shoulders of Dwarfs: the Kepler asteroseismic LEGACY sample II - radii, masses, and ages
• The connection between stellar granulation and oscillation as seen by the Kepler mission
• Standing on the shoulders of Dwarfs: the $Kepler$ asteroseismic LEGACY sample I - oscillation mode parameters
• A Guide to Realistic Uncertainties on Fundamental Properties of Solar-Type Exoplanet Host Stars
• Asteroseismology of solar-type stars
• Surface rotation and photometric activity for Kepler targets. II. G and F main-sequence stars, and cool subgiant stars
• DIAMONDS: a new Bayesian Nested Sampling tool. Application to Peak Bagging of solar-like oscillations
• Rotation speed and stellar axis inclination from p modes: How CoRoT would see other suns
• Automated preparation of Kepler time series of planet hosts for asteroseismic analysis
• First Results From The Hertzsprung Song Telescope: Asteroseismology Of The G5 Subgiant Star {\Mu}Her
• Frequency, splitting, linewidth and amplitude estimates of low-l p modes of alpha Cen A: analysis of WIRE photometry
• A 20-Second Cadence View of Solar-Type Stars and Their Planets with TESS: Asteroseismology of Solar Analogs and a Re-characterization of pi Men c
• Seismic sensitivity to sub-surface solar activity from 18 years of GOLF/SoHO observations
• On deriving p-mode parameters for inclined solar-like stars
• Oscillation mode linewidths and heights of 23 main-sequence stars observed by Kepler
• PBjam: A Python package for automating asteroseismology of solar-like oscillators
• AsteroFLAG: first results from hare-and-hounds Exercise 1
• Detections of solar-like oscillations in dwarfs and subgiants with Kepler DR25 short-cadence data
• Mode width fitting with a simple bayesian approach. Application to CoRoT targets HD 181420 and HD 49933
• ROOSTER: a machine-learning analysis tool for Kepler stellar rotation periods
• Fourier Analysis of Gapped Time Series: Improved Estimates of Solar and Stellar Oscillation Parameters
• Sun-as-a-star observations: evidence for degree dependence of changes in damping of low-l p modes along the solar cycle
• Fast and Automated Peak Bagging with DIAMONDS (FAMED)
• Oscillations in the Sun with SONG: Setting the scale for asteroseismic investigations
• solarFLAG hare and hounds: estimation of p-mode frequencies from Sun-as-star helioseismology data
• Properties of the ionisation glitch: I. Modelling the ionisation region
• No swan song for Sun-as-a-star helioseismology: performances of the Solar-SONG prototype for individual mode characterisation

Cited by in corpus (16)

• Asteroseismology and Spectropolarimetry of the Exoplanet Host Star $\lambda$ Serpentis
• Spinning up the Surface: Evidence for Planetary Engulfment or Unexpected Angular Momentum Transport?
• Multi-campaign Asteroseismic Analysis of eight Solar-like pulsating stars observed by the K2 mission
• Imprint of the magnetic activity cycle on solar asteroseismic characterisation based on 26 years of GOLF and BiSON data
• Seismic differences between solar magnetic cycles 23 and 24 for low-degree modes
• TESS asteroseismology of $\beta$ Hydri: a subgiant with a born-again dynamo
• Testing the Rossby Paradigm: Weakened Magnetic Braking in early K-type Stars
• TESS Asteroseismic Analysis of HD 76920: The Giant Star Hosting An Extremely Eccentric Exoplanet
• Influence of the magnetic activity cycle on mean density and acoustic radius inversions
• In search of gravity mode signatures in main sequence solar-type stars observed by Kepler
• Seismic detection of core magnetic fields in red giants using the gravity offset
• Beyond the Nyquist frequency: Asteroseismic catalog of undersampled Kepler late subgiants and early red giants
• Dynamical mass of a solar-like oscillator at the main-sequence turnoff from Gaia astrometry & ground-based spectroscopy
• Non-transiting exoplanets as a means of understanding star-planet interactions in close-in systems
• Anti-Solar Differential Rotation May Have Revived Magnetic Braking in the Subgiant 31 Aquilae
• Near-degeneracy effects in Quadrupolar Mixed Modes. From an Asymptotic Description to Data Fitting