Classical Cepheids in open clusters in the era of Gaia DR2

TL;DR

This paper reports an all-sky search for classical Cepheids in Galactic open clusters using Gaia DR2 data, aiming to improve understanding of stellar populations and star formation history through Bayesian membership analysis.

Contribution

It introduces a novel methodology leveraging Gaia DR2 data to identify Cepheids in open clusters and determine their membership probabilities.

Findings

Preliminary identification of Cepheid-cluster associations.

Application of Bayesian analysis for membership probability estimation.

Enhanced understanding of Cepheid distribution in the Galaxy.

Abstract

Classical Cepheids in open clusters are key ingredients for stellar population studies and the characterization of variable stars, as they are tracers of young and massive populations and of recent star formation episodes. Cluster Cepheids are of particular importance since they can be age dated by using the cluster's stellar population to obtain the Cepheid period-luminosity-age relation. In this contribution, we present the preliminary results of an all-sky search for classical Cepheids in Galactic open clusters by taking advantage of the unprecedented astrometric precision of the second data release of the Gaia satellite. To do this, we determined membership probabilities by performing a Bayesian analysis based on the spatial distribution of Cepheids and clusters, and their kinematics. Here we describe our adopted methodology.