The R1R2' outer ring revealed by young open cluster data
Anna Mel'nik, Pertti Rautiainen, Elena Glushkova, Andrei Dambis
TL;DR
This paper investigates the structure of the Milky Way's outer ring R1R2' using young open cluster data, estimating the solar position angle and confirming the ring's presence.
Contribution
It provides observational evidence for the R1R2' outer ring in the Galaxy and estimates the solar position angle using multiple open cluster catalogues.
Findings
The outer ring R1R2' is supported by young open cluster distribution.
The solar position angle theta_b is approximately 35 degrees.
Different open cluster catalogues yield consistent theta_b estimates.
Abstract
The distribution of young open clusters in the Galactic plane suggests the existence of the outer ring R1R2' in the Galaxy. The solar position angle theta_b providing the best agreement between the observed and model distribution is theta_b=35 +\- 10 degrees. We compared the theta_b values derived from three different catalogues of open cluster and they appear to be consistent within the errors.
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