Population I-type objects and galactic structure

Abstract

Data on open clusters, WR stars and supernova remnants (SNRs) have been used to study the large-scale structure of Milky Way. A comparison of the distributions of WR stars and SNRs indicates a weak correlation. It is also found that the planes of symmetry defined by open clusters, WR stars and SNRs, are inclined with respect to the formal galactic plane. The location of the sun with respect to these planes of symmetry has been obtained. The pane of symmetry defined by SNRs is located above the sun while the planes of symmetry defined by open clusters and WR stars ae situated below the Sun.