Periodic Spacing of Protocluster Clumps in a Filamentary Infrared Dark Cloud

Details Periodic Spacing of Protocluster Clumps in a Filamentary Infrared Dark Cloud Periodic Spacing of Protocluster Clumps in a Filamentary Infrared Dark Cloud

May 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aas...21630903j&link_type=abstract

American Astronomical Society, AAS Meeting #216, #309.03; Bulletin of the American Astronomical Society, Vol. 41, p.872

Astronomy and Astrophysics

Astronomy

Scientific paper

The ''Nessie'' nebula is an extremely filamentary infrared dark cloud, with an aspect ratio of over 300:1. HNC 1-0 observations with the Australia Telescope National Facility's Mopra Telescope demonstrate that Nessie is a single, coherent cloud with high densities (n > 105 cm-3). The filamentary cloud contains a number of protocluster clumps with a nearly regular, periodic spacing of 5 pc. Such clumps naturally arise from the ''varicose'' fluid instability of a self-gravitating fluid cylinder. Because of the ubiquitous association between massive clusters and filamentary molecular clouds (e.g., Orion, NGC 6334, etc.), we speculate that clusters naturally arise from filamentary infrared dark clouds via fluid instabilities.

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