Hill, T.; Motte, F.; Didelon, P.; Bontemps, S.; Minier, V.; Hennemann, M.; Schneider, N.; André, Ph.; Men‘shchikov, A.; Anderson, L. D.; Arzoumanian, D.; Bernard, J.-P.; di Francesco, J.; Elia, D.; Giannini, T.; Griffin, M. J.; Könyves, V.; Kirk, J.; Marston, A. P.; Martin, P. G.; Molinari, S.; Nguyen Luong, Q.; Peretto, N.; Pezzuto, S.; Roussel, H.; Sauvage, M.; Sousbie, T.; Testi, L.; Ward-Thompson, D.; White, G. J.; Wilson, C. D. and Zavagno, A.
|DOI (Digital Object Identifier) Link:||http://doi.org/10.1051/0004-6361/201117315|
|Google Scholar:||Look up in Google Scholar|
We present the first Herschel PACS and SPIRE results of the Vela C molecular complex in the far-infrared and submillimetre regimes at 70, 160, 250, 350, and 500 μm, spanning the peak of emission of cold prestellar or protostellar cores. Column density and multi-resolution analysis (MRA) differentiates the Vela C complex into five distinct sub-regions. Each sub-region displays differences in their column density and temperature probability distribution functions (PDFs), in particular, the PDFs of the “Centre-Ridge” and “South-Nest” sub-regions appear in stark contrast to each other. The Centre-Ridge displays a bimodal temperature PDF representative of hot gas surrounding the HII region RCW 36 and the cold neighbouring filaments, whilst the South-Nest is dominated by cold filamentary structure. The column density PDF of the Centre-Ridge is flatter than the South-Nest, with a high column density tail, consistent with formation through large-scale flows, and regulation by self-gravity. At small to intermediate scales MRA indicates the Centre-Ridge to be twice as concentrated as the South-Nest, whilst on larger scales, a greater portion of the gas in the South-Nest is dominated by turbulence than in the Centre-Ridge. In Vela C, high-mass stars appear to be preferentially forming in ridges, i.e., dominant high column density filaments.
|Item Type:||Journal Article|
|Copyright Holders:||2011 ESO|
|Extra Information:||9 pp.|
|Keywords:||dust; extinction; early-type stars; protostars; Vela C|
|Academic Unit/Department:||Science > Physical Sciences
|Interdisciplinary Research Centre:||Centre for Earth, Planetary, Space and Astronomical Research (CEPSAR)|
|Depositing User:||G. J. White|
|Date Deposited:||30 Jan 2012 17:05|
|Last Modified:||18 Jan 2016 12:03|
|Share this page:|