Properties of 42 Solar-type Kepler Targets from the Asteroseismic Modeling Portal

TL;DR

This study analyzes 42 solar-type Kepler stars using asteroseismic data, demonstrating that detailed frequency fitting significantly improves the precision of stellar property estimates over traditional methods.

Contribution

It provides a uniform analysis of Kepler targets showing that frequency fitting enhances the accuracy of stellar radius, mass, and age measurements.

Findings

Frequency fitting doubles the precision of radius, mass, and age.

Improves radius and mass estimates by a factor of three over scaling relations.

Demonstrates applications of derived stellar properties.

Abstract

Recently the number of main-sequence and subgiant stars exhibiting solar-like oscillations that are resolved into individual mode frequencies has increased dramatically. While only a few such data sets were available for detailed modeling just a decade ago, the Kepler mission has produced suitable observations for hundreds of new targets. This rapid expansion in observational capacity has been accompanied by a shift in analysis and modeling strategies to yield uniform sets of derived stellar properties more quickly and easily. We use previously published asteroseismic and spectroscopic data sets to provide a uniform analysis of 42 solar-type Kepler targets from the Asteroseismic Modeling Portal (AMP). We find that fitting the individual frequencies typically doubles the precision of the asteroseismic radius, mass and age compared to grid-based modeling of the global oscillation properties, and improves the precision of the radius and mass by about a factor of three over empirical scaling relations. We demonstrate the utility of the derived properties with several applications.