High resolution CO observations of S88-B

White, G. J. and Fridlund, C. V. M. (1992). High resolution CO observations of S88-B. Astronomy & Astrophysics, 266 pp. 452–456.

URL: http://adsabs.harvard.edu/abs/1992A%26A...266..452...

Abstract

CO J = 2-1 and ¹³CO J = 2-1 and 1-0 observations have been made of the H II region S88-B, using the 15-m James Clerk Maxwell telescope in Hawaii and the 20-m telescope at Onsala. The core of the cloud is resolved into a horseshoelike structure which surrounds a diffuse reflection nebula. The central core has a mass of ≥ 1000 M_⊙, with 400 M_⊙ in the horseshoe structure. The gas in the horse in the horseshoe appears highly fragmented, and has a kinetic temperature of ≈ 60 K, suggesting it is closely coupled to the dust temperature. A recently formed high mass star appears to be in the process of evacuating a cavity, possibly through a large molecular outflow that is found to show an accelerated component in its blue-shifted lobe. A velocity gradient across the horseshoe structure suggest ordered motion, and could represent rotation in the parental cloud.

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