A Homogeneous Catalog of Oscillating Solar-Type Stars Observed by the Kepler Mission and a New Amplitude Scaling Relation Including Chromospheric Activity
We present a homogeneous catalog of global asteroseismic parameters and derived stellar parameters for 765 Kepler main-sequence and subgiant stars.
The catalog was produced by re-analyzing all available Kepler DR25 short-cadence data using pySYD, an automated pipeline to extract global asteroseismic parameters. We find 50 new detections, seven of which are also planet candidate host stars.
We find excellent agreement between our νmax and Δν measurements and literature values, with an average offset of 0.2±0.4% (σ=5%) and 0.2±0.7% (σ=2%), respectively.
In addition, we derive stellar radii and masses with an average precision of 2.7% and 10.4%, respectively, and find a median offset of 0.4±0.4% (σ=10%) between our radii derived with asteroseismology and those from Gaia parallaxes. Using spectroscopic logR′HK activity measurements from Keck/HIRES, we derive a new amplitude scaling relation with an activity term for main-sequence and subgiant stars, which reduces the offset between expected and observed oscillation amplitudes from 9.3±1.6% to 1.7±0.9%.
Our work is the largest and most homogeneous asteroseismic catalog of Kepler main-sequence and subgiant stars to date, including a total of 101 stars hosting planet candidates and 451 stars with measured rotation periods.
Maryum Sayeed, Daniel Huber, Ashley Chontos, Yaguang Li
Comments: 24 pages, 16 figures, 5 tables, submitted to AJ. An electronic version of Tables 3 & 4 will be available after peer review
Subjects: Solar and Stellar Astrophysics (astro-ph.SR); Earth and Planetary Astrophysics (astro-ph.EP)
Cite as: arXiv:2503.15599 [astro-ph.SR] (or arXiv:2503.15599v1 [astro-ph.SR] for this version)
https://doi.org/10.48550/arXiv.2503.15599
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Submission history
From: Maryum Sayeed
[v1] Wed, 19 Mar 2025 18:00:01 UTC (5,238 KB)
https://arxiv.org/abs/2503.15599
Astrobiology, Stellar Cartography,
