Using NASA's Kepler and ESA's Gaia spacecraft, an international team of astronomers has conducted an astroseismic investigation of six giant stars in the open cluster NGC 6866. The study, presented August 24 on the pre-print server arXiv, sheds more light on the properties of these giant stars and the cluster itself.
Gaia color-magnitude diagrams of NGC 6866 proper motion and parallax members. Credit: Brogaard et al., 2023.
Discovered in 1783, NGC 6866 is a relatively young OC in the constellation Cygnus, at a distance of about 3,900away. However, although the cluster is known for more than two centuries, many of its properties, including age are still uncertain. "We identify six giant members of NGC 6866 via photometry, proper motions, and parallaxes from Gaia and spectroscopic literature measurements. These are combined with asteroseismic measurements which we derive using photometric data from the Kepler mission for five of the stars," the researchers explained.in the helium-core burning phase, namely: KIC 8461659, KIC 8329894, KIC 8395903, KIC 8264549, KIC 7991875 and KIC 8264592.
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