New star clusters discovered towards the Galactic bulge direction using Gaia DR2

Abstract

We report the discovery of 34 new open clusters and candidates as a result of a systematic search carried out in 200 adjacent fields of 1x1 square degrees area projected towards the Galactic bulge, using Gaia DR2 data. The objects were identified and characterized by a joint analysis of their photometric, kinematic and spatial distribution, which has been consistently used and proved to be effective in our previous works. The discoveries were validated by cross-referencing the objects position and astrometric parameters with the available literature. Besides their coordinates and astrometric parameters, we also provide sizes, ages, distances and reddening for the discovered objects. In particular, 32 clusters are closer than 2 kpc from the Sun, which represents an increment of nearly 39% of objects with astrophysical parameters determined in the nearby inner disk. Although these objects fill an important gap in the open clusters distribution along the Sagittarius arm, this arm, traced by known clusters, appears to be interrupted, which may be an artifact due to the incompleteness of the cluster census.

5 pages, 4 figures, Accepted in MNRAS Jan-2021

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• The spiral structure in the Solar neighborhood
• Global survey of star clusters in the Milky Way -- VII. Tidal parameters and mass function
• Blind Search of The Solar Neighborhood Galactic Disk within 5kpc: 1,179 new Star clusters found in Gaia DR3
• The new detection of blue straggler stars in 50 open clusters using Gaia DR3
• Enlightening the dynamical evolution of Galactic open clusters: an approach using Gaia DR3 and analytical descriptions
• Open clusters housing classical Cepheids in Gaia DR3
• On the dynamical evolution of Cepheids in star clusters
• Revisit of open clusters UPK 39, UPK 41 and PHOC 39 : a new binary open cluster found
• A Gaia based photometric and kinematic analysis of the old open cluster King 11
• Study of the open cluster Alessi-Teutsch 9 (ASCC 10) using multiband photometry and Gaia EDR3
• The OmegaWhite Survey for Short Period Variable Stars VI. Open Clusters