Affiliation:
1. Yerevan State University, Yerevan, Armenia
2. Byurakan Astrophysical Observatory, Byurakan, Aragatsotn Province, Armenia
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.
Publisher
National Academy of Sciences of the Republic of Armenia
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