Exploiting the open clusters in the Kepler and CoRoT fields

TL;DR

This paper investigates open clusters in Kepler and CoRoT fields to test stellar models, focusing on eclipsing binaries and asteroseismic relations, revealing potential overestimation of stellar masses by current scaling relations.

Contribution

It introduces a method to test and refine asteroseismic scaling relations using eclipsing binaries in open clusters, addressing current uncertainties.

Findings

Asteroseismic scaling relations may overestimate stellar mass.

Ongoing measurements aim to resolve correction degeneracies.

Potential to identify non-standard stellar evolution through ensemble asteroseismology.

Abstract

The open clusters in the Kepler and CoRoT fields potentially provide tight constraints for tests of stellar models and observational methods because they allow a combination of complementary methods. We are in the process of identi- fying and measuring parameters for detached eclipsing binaries (dEBs) in the open clusters in the Kepler and CoRoT fields. We make use of measurements of dEBs in the clusters to test the accuracy of asteroseismic scaling relations for mass. We are able to provide strong indications that the asteroseismic scaling relations over- estimate the stellar mass, but we are not yet able to distinguish between different proposed corrections from the literature. We argue how our ongoing measurements of more dEBs in more clusters, complemented by dEBs in the field, should be able to break the degeneracy. We also briefly describe how we can identify cluster stars that have evolved through non-standard evolution by making use of ensemble asteroseismology.