Search Swinburne Research Bank
Home List of Titles Observations and radiative transfer modelling of a massive dense cold core in G333
Please use this identifier to cite or link to this item: http://hdl.handle.net/1959.3/193708
- Observations and radiative transfer modelling of a massive dense cold core in G333
- Lo, N.; Redman, M. P.; Jones, P. A.; Cunningham, M. R.; Chhetri, R.; Bains, I.; Burton, M. G.
- Cold massive cores are one of the earliest manifestations of high-mass star formation. Following the detection of SiO emission from G333.125−0.562, a cold massive core, further investigations of the physics, chemistry and dynamics of this object has been carried out. Mopra and NANTEN2 molecular line profile observations, Australia Telescope Compact Array (ATCA) line and continuum emission maps and Spitzer 24 and 70 μm images were obtained. These new data further constrain the properties of this prime example of the very early stages of high-mass star formation. A model for the source was constructed and compared directly with the molecular line data using a 3D molecular line transfer code –mollie. The ATCA data reveal that G333.125−0.562 is composed of two sources. One of the source is responsible for the previously detected molecular outflow and is detected in the Spitzer 24 and 70 μm band data. Turbulent velocity widths are lower than other more active regions of G333 which reflects the younger evolutionary stage and/or lower mass of this core. The molecular line modelling requires abundances of the CO isotopes that strongly imply heavy depletion due to freeze-out of this species on to dust grains. The principal cloud is cold, moderately turbulent and possesses an outflow which indicates the presence of a central driving source. The secondary source could be an even less evolved object as no apparent associations with continuum emissions at (far-)infrared wavelengths.
- Publication type
- Journal article
- Research centre
- Swinburne University of Technology. Faculty of Information and Communication Technologies. Centre for Astrophysics and Supercomputing
- Monthly Notices of the Royal Astronomical Society, Vol. 415, no. 1 (Jul 2011), pp. 525-533
- Publication year
- FOR Code(s)
- 0201 Astronomical and Space Sciences
- Dynamics; G333.125-0.562; ISM; Jets; Kinematics; Outflows; Radiative transfer; Star formation
- Wiley-Blackwell Publishing
- Publisher URL
- Copyright © 2011 The Authors. Monthly Notices of the Royal Astronomical Society copyright © 2011 RAS.
- Peer reviewed