EPoS Contribution
EPoS Contribution
The dynamical properties of dense filaments in the infrared dark cloud G035.39-00.33

Jonathan Henshaw
LJMU, Liverpool, GB
Infrared Dark Clouds provide an exciting opportunity to identify the initial conditions for massive star formation. I will review our work from a recent series of papers that serves as a case study of IRDC G035.39-00.33, a massive, filamentary molecular cloud in an early stage of evolution.
I will compare and contrast high-sensitivity and high-spectral resolution IRAM 30m data (large-scale, ~ 0.5 pc resolution) and high-angular resolution data obtained with the Plateau de Bure Interferometer (small-scale, < 0.1 pc resolution). Both data sets are extremely complex, with multiple spectral features at any given position. I will reveal that, in contrast to how G035 appears in extinction or column density maps (as a single filamentary structure), it, in fact, comprises a serpentine network of morphologically distinct and mildly supersonic sub-filaments. Whilst global velocity gradients throughout each sub-filament are small, there is evidence for dynamic processes on local scales. This suggests that the kinematics are influenced by the dense (and in some cases, starless) cores. The physical properties of these cores have been derived using 3.2mm continuum emission from the PdBI, and we identify possible candidates for the progenitors of intermediate-to-high-mass stars.
P. Caselli, MPE, DE
F. Fontani, INAF, IT
I. Jimenez-Serra, UCL, GB
J.C. Tan, U Florida, US
Key publication

Suggested Session: Filaments