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J/other/RAA/21.93 74 new open clusters found in Gaia DR2 (He+, 2021)
The following files can be converted to FITS (extension .fit or fit.gz)
new-oc.dat members.dat
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Query from: http://vizier.cds.unistra.fr/viz-bin/VizieR?-source=J/other/RAA/21.93
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Beginning of ReadMe :J/other/RAA/21.93 74 new open clusters found in Gaia DR2 (He+, 2021)
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A catalogue of 74 new open clusters found in Gaia Data-Release 2.
He Z.-H., Xu Y., Hao C.-J., Wu Z.-Y., Li J.-J.
<Res. Astron. Astrophys. 21, 93 (2021)>
=2021RAA....21...93H (SIMBAD/NED BibCode)
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ADC_Keywords: Milky Way ; Clusters, open ; Proper motions ; Optical
Keywords: Galaxy: open clusters - methods: data analysis - surveys
Abstract:
Based on astrometric data from Gaia Data-Release 2 (DR2), we employ an
un- supervised machine learning method to blindly search for open star
clusters in the Milky Way within the Galactic latitude range of
|b|<20degree. In addition to 2080known clusters, 74 new open cluster
candidates are found. In this work, we present the positions, apparent
radii, parallaxes, proper motions and member stars of these
candidates. Meanwhile, to obtain the physical parameters of each
candidate cluster, stellar isochrones are fit to the photometric data.
The results show that the apparent radii and the observed proper
motion dispersions of these new candidates are consistent with those
of open clusters previously identified in Gaia DR2.
Description:
Adopting the clustering algorithm DBSCAN, we used the positions,
parallaxes, and proper motions of nearly 170 million stars within the
galactic latitude range |b|<20deg and parallax plx>0.2mas in Gaia
DR2 to search for unknown OCs. We cross-matched our initial sample
with previous star cluster catalogues, and after performing several
vetting stages, we obtained a catalogue of 74 new OC candidates. We
fitted isochrones to these candidates and obtained their corresponding
physical parameters. The apparent radii and observed proper motion
dispersions of the new cluster candidates were consistent with those
of OCs previously found in Gaia DR2.