NEARBY OPEN CLUSTERS SHAPE : THREE-DIMENSIONAL GAUSSIAN MIXTURE MODEL AND TWO-DIMENSIONAL DENSITY MAPS
Language
en
Communication dans un congrès
This item was published in
2019-05-14, Nice.
English Abstract
We use new memberships from Gaia DR2 to investigate the shape of the nearest open clusters. For open clusters closer than 250 pc from the Sun, we fit 3D ellipsoids on the spatial distribution of the members. At higher ...Read more >
We use new memberships from Gaia DR2 to investigate the shape of the nearest open clusters. For open clusters closer than 250 pc from the Sun, we fit 3D ellipsoids on the spatial distribution of the members. At higher distances, the radial effect due to the uncertainties on the parallax measurements introduces a strong bias in the spatial distribution of members. Therefore, for more distant open clusters, we compute density maps on the sky to study their spatial properties and search for correlations with age and galactic environments of the clusters.Read less <
English Keywords
Gaia
open clusters
solar neighborhood
Origin
Hal imported