Clumpy molecular structures revolving the B[e] supergiant MWC 137
  The peculiar emission-line star MWC 137 with its extended optical nebula was recently classified as B[e] supergiant. To study the spatial distribution of its circumstellar molecular gas on small and large scales, we obtained near-infrared and radio observations using SINFONI and APEX, respectively. We find that the hot CO gas is arranged in moving clumpy ring and shell structures close to the star, while a cold CO envelope is encircling the borders of the optical nebula from the south to the west. 
M. Kraus, L.S. Cidale, T. Liimets, C.E. Cappa, N. Duronea, D.S.   Gunawan, M.E. Oksala, M. Santander-Garcia, M.L. Arias, D.H...
astro-ph.SR