The radio and IR counterparts of the ring nebula around HD 211564

C. CAPPA; J. VASQUEZ; S. PINEAULT; S. CICHOWOLSKI

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY

WILEY-BLACKWELL PUBLISHING, INC

Año: 2010 vol. 403 p. 387 - 398

0035-8711

We report the detection of the radio and infrared counterparts ofthe ring nebula around the WN3(h) star HD211564 (WR152), located to the southwest 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 9arcmin  and 16arcmin 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 cm-3 and 450-700 msun, respectively. The analysis of the HI gas emission distribution allowed the identification of 5900 msun of neutral atomic gas with velocities between --52 and  --43 km/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 790 msun. About 310 msun are related to a small infrared shell-like source linked to the inner ring, which is also detected in the MSX band A. An IRAS YSO 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 WR star and its massive progenitor, and are evolving in the envelope of a slowly expanding shell centered at (l,b) = (102.50, --0.83), of about 31 pc in radius. The bubble´s energy conversion efficiency is in agreement with recent numerical analysis and with observational results.