New Open Clusters Found by Manual Mining of Data in Gaia DR2

Abstract

The physical nature of a series of 20 new open clusters is confirmed employing existing data on putative star members, mainly from second Gaia Data Release (DR2). The clusters were discovered as overdensities of stars by visual inspection of either photographic DSS plates or proper motion plots of random source fields. The reported objects are not present in the most comprehensive or recent catalogs of stellar clusters and associations. For all of them, clumps of comoving stars are revealed in the proper motion space. The parallaxes of the clumped stars are compatible with the real existence of open clusters over narrow ranges of distances. Surface density calculations, free of most noise from non-member sources, allow in some cases differentiating a cluster core and an extended cluster corona. Color-magnitude diagrams generally show a definite main sequence that allows the confirmation of the physical existence of the clusters and some of their characteristics. Two of the new clusters seem to form a double system with a common origin. Several of the new clusters challenge the claim of near completeness of the known OC population in the distance range from 1.0 to 1.8 kpc of the Sun (Kharchenko et al. 2013).

16 pages, 10 figures, 1 table. Minor changes from first version. To be published in Research in Astronomy and Astrophysics

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Cited by in corpus (10)

• A Blind All-sky Search for Star Clusters in Gaia EDR3: 886 Clusters within 1.2 kpc of the Sun
• New Open Cluster candidates Found in Galactic Disk Using Gaia DR2/EDR3 Data
• Unveiling hidden stellar aggregates in the Milky Way: 1656 new star clusters found in Gaia EDR3
• Blind Search of The Solar Neighborhood Galactic Disk within 5kpc: 1,179 new Star clusters found in Gaia DR3
• Binary open clusters in the Gaia data
• The list of possible double and multiple open clusters between galactic longitudes 240 and 270 degrees
• The new detection of blue straggler stars in 50 open clusters using Gaia DR3
• Survey for Distant Stellar Aggregates in Galactic Disk: Detecting Two Thousand Star Clusters and Candidates, along with the Dwarf Galaxy IC10
• Binary and Grouped Open Clusters: A New Catalogue
• Study of the open cluster Alessi-Teutsch 9 (ASCC 10) using multiband photometry and Gaia EDR3