The Bayesian Asteroseismology data Modeling pipeline and its application to $K2$ data

Abstract

We present the Bayesian Asteroseismology data Modeling (BAM) pipeline, an automated asteroseismology pipeline that returns global oscillation parameters and granulation parameters from the analysis of photometric time-series. BAM also determines if a star is likely to be a solar-like oscillator. We have designed BAM to specially process $K2$ light curves, which suffer from unique noise signatures that can confuse asteroseismic analysis, though it may be used on any photometric time series --- including those from $Kepler$ and $TESS$. We demonstrate the BAM oscillation parameters are consistent within $\sim 1.53\%(\mathrm{random})\pm 0.2\%(\mathrm{systematic})$ and $1.51\%(\mathrm{random})\pm 0.6\%(\mathrm{systematic})$ for ${\nu }_{\max }$ and $\Delta \nu$ with benchmark results for typical $K2$ red giant stars in the $K2$ Galactic Archaeology Program's (GAP) Campaign 1 sample. Application of BAM to $13016$ $K2$ Campaign 1 targets not in the GAP sample yields $104$ red giant solar-like oscillators. Based on the number of serendipitous giants we find, we estimate an upper limit on the average purity in dwarf selection among C1 proposals is $\approx 99\%$, which could be lower when considering incompleteness in BAM detection efficiency, and proper motion cuts specific to C1 Guest Observer proposals.

Published in ApJ

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Cited by in corpus (11)

• Giant planet occurrence within 0.2 AU of low-luminosity red giant branch stars with K2
• Detection and characterisation of oscillating red giants: first results from the TESS satellite
• The K2 Galactic Archaeology Program Data Release 3: Age-abundance patterns in C1-C8 and C10-C18
• TESS asteroseismology of the Kepler red giants
• A Catalogue of Solar-Like Oscillators Observed by TESS in 120-second and 20-second Cadence
• Age-Dating Red Giant Stars Associated with Galactic Disk and Halo Substructures
• The K2 Galactic Archaeology Program Data Release 2: Asteroseismic results from campaigns 4, 6, & 7
• An Intermediate-age Alpha-rich Galactic Population in K2
• The effect of the adiabatic assumption on asteroseismic scaling relations for luminous red giants
• Vetting Asteroseismic $\Delta \nu$ Measurements using Neural Networks
• FRA -- A new Fast, Robust and Automated pipeline for the detection and measurement of solar-like oscillations in time-series photometry of red-giant stars