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Title:
Stellar Membership of RCW 34 HII Star-Forming Region
Creator:
Grigoryan, V. M. ; Samsonyan, A. L. ; Nikoghosyan, E. H. ; Azatyan, N. M. ; Andreasyan, D. H. ; Khachatryan, A. A.
Subject:
Astrometry ; Space Sciences ; Archaeoastronomy and Astronomy in Culture
Uncontrolled Keywords:
Open clusters and associations ; Vel OB1- stars ; formation ; stars ; early type stars
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Abstract:
The Vel OB1 association, located at a distance of 1.5-1.9 kpc, is one of the most actively studied star formation regions in the southern hemisphere. Our study focuses on an “Arclike” structure within the Vel OB1 association, which may have been formed from a shock wave caused by a supernova explosion about 2-2.5 Myr ago. Optical Gaia data revealed probable stellar members only in the southern part of the Arclike structure, where the RCW34 HII (IRAS 08546-4254) region is located. In contrast, the northeastern part of the Arclike structure, in the vicinity of the IRAS 08563-4225 source, hosts more embedded stellar population. Using near-infrared astrometric and photometric data from the 2MASS survey, we identified well-defined clusters of young stellar objects in the vicinity of both IRAS 08546-4254 and IRAS 08563-4225. The members of the cluster associated with IRAS 08563-4225 exhibit stronger infrared excess.