The initial steps of star and cluster formation are believed to be 
tightly linked to the evolution of interstellar filaments. In  
contrast to lower-mass filaments, mass accretion from large scales 
in the form of sub-filaments seems to play a key role for the formation 
of  their high-mass counterparts. The build up of massive filaments is 
still poorly understood and only a few examples are known to date.  
G351.77-0.51 is the youngest and most massive filament in the ATLASGAL  
survey of the Galactic plane within 1 kpc and it exhibits a remarkable  
large-scale network of filamentary structures seen in extinction at  
8micron. I will present a detailed study of the kinematics of G351.77  
and of the network of sub-filaments converging based on C18O APEX data.

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Oggi Astro Chiacchiere! è un incontro informale tra il personale dell'Osservatorio Astronomico di Cagliari        
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