207 New Open Star Clusters within 1 kpc from Gaia Data Release 2

Understand

We conducted a survey of open clusters within 1 kpc from the Sun using the astrometric and photometric data of the Gaia Data Release 2.

• We found 655 cluster candidates by visual inspection of the stellar distributions in proper motion space and spatial distributions in l-b space.
• All of the 655 cluster candidates have a well defined main-sequence except for two candidates if we consider that the main sequence of very young clusters is somewhat broad due to differential extinction.
• Cross-matching of our 653 open clusters with known open clusters in various catalogs resulted in 207 new open clusters.