Speaker
Description
NGC 6819 is a well-studied open cluster located in the northern constellation Cygnus, known for its rich population of stars and moderate age. Complementing the Kepler data, Gaia DR2 offers parallax, proper motion, and photometric data, which we use to establish the cluster’s membership, distance, and overall spatial distribution. Through a combination of proper motion analysis and photometric criteria, we identify a robust sample of cluster members, enabling us to assess the metallicity, luminosity function, and age distribution of the stars in NGC 6819. In addition, we derive the distance modulus from Gaia parallaxes for Kepler Input Catalogue (KIC) stars located within 10 arcmin in the field of NGC6819. The mean distance modulus is used to determine probable new KIC members of NGC6819 cluster. We find 7 probable KIC new astrometric distance members which have been previously overlooked in the literature as revealed by Gaia Data Release 2 (DR2). Of these, one is a solar-like star (SOLR), one γ Dor star (GDOR), 2 rotational variables, 1 eclipsing binary and 2 unknown types. There is no significant difference in the mean distance modulus when probable new astrometric members are included in deriving the mean distance modulus.
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