2010MNRAS.403..387C

We report the detection of the radio and infrared (IR) counterparts of the ring nebula around the WN3(h) star HD211564 (WR152), located to the south-west of the HII region Sh2132. Using radio continuum data from the Canadian Galactic Plane Survey, we identified the radio counterparts of the two concentric rings, of about 9 and 16 arcmin in radius, related to the star. After applying a filling factor f = 0.05-0.12, electron densities and ionized masses are in the range 10-16/cm3 and 450-700M_☉, respectively. The analysis of the Hi gas emission distribution allowed the identification of 5900M_☉ of neutral atomic gas with velocities between -52 and -43km/s probably linked to the nebula. The region of the nebula is almost free of molecular gas. Only four small clumps were detected, with a total molecular mass of 790M_☉. About 310 M_☉ are related to a small IR shell-like source linked to the inner ring, which is also detected in the MSX band A. An IRAS young stellar object candidate is detected in coincidence with the shell-like IR source.

We suggest that the optical nebula and its neutral counterparts originated from the stellar winds from the Wolf-Rayet star and its massive progenitor, and are evolving in the envelope of a slowly expanding shell centred at of about 31 pc in radius. The bubble's energy conversion efficiency is in agreement with recent numerical analysis and with observational results.