Ammonia observations of the nearby molecular cloud MBM 12

Details Ammonia observations of the nearby molecular cloud MBM 12 Ammonia observations of the nearby molecular cloud MBM 12

2000-01-11

arxiv.org/abs/astro-ph/0001175v1

Astronomy and Astrophysics

Astrophysics

8 pages, 3 figures, accepted by MNRAS

Scientific paper

10.1046/j.1365-8711.2000.03346.x

We present NH3(1,1) and NH3(2,2) observations of MBM 12, the closest known molecular cloud (65 pc distance), aimed to find evidence for on-going star formation processes. No local temperature (with a T_rot upper limit of 12 K) nor linewidth enhancement is found, which suggests that the area of the cloud we mapped (~ 15' size) is not currently forming stars. Therefore, this close ``starless'' molecular gas region is an ideal laboratory to study the physical conditions preceding new star formation. A radio continuum source was found in Very Large Array archive data, close but outside the NH3 emission. This source is likely to be a background object.

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