Giant molecular complexes and OB associations. I - The Rosette molecular complex

Astronomy and Astrophysics – Astrophysics

Scientific paper

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B Stars, Carbon Monoxide, Hydrogen Clouds, Molecular Clouds, O Stars, Star Clusters, Astronomical Maps, Stellar Evolution

Scientific paper

CO observations of the Rosette molecular complex associated with Mon OB2 are presented. The complex is extended along the galactic plane, has a maximum extent of about 100 pc, and shows a striking interaction with the Rosette Nebula. The molecular gas appears to be embedded in a H I cloud with a mass comparable to the molecular mass. The molecular mass is estimated to be 130,000 solar masses, and the inferred volume density is about 30 per cu cm. The complex has an overall velocity gradient of 0.20 km/s pc. At high resolution the CO appears to be very clumpy.

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