Astronomy and Astrophysics – Astrophysics
Scientific paper
2007-07-10
Astronomy and Astrophysics
Astrophysics
6 pages, 4 figures, 1 table, to be published in MNRAS
Scientific paper
10.1111/j.1745-3933.2007.00360.x
We report the detection of the SiO (J = 2 - 1) transition from the massive cold dense core G333.125-0.562. The core remains undetected at wavelengths shorter than 70 micron and has compact 1.2 mm dust continuum. The SiO emission is localised to the core. The observations are part of a continuing multi-molecular line survey of the giant molecular cloud G333. Other detected molecules in the core include 13CO, C18O, CS, HCO+, HCN, HNC, CH3OH, N2H+, SO, HC3N, NH3, and some of their isotopes. In addition, from NH3 (1,1) and (2,2) inversion lines, we obtain a temperature of 13 K. From fitting to the spectral energy distribution we obtain a colour temperature of 18 K and a gas mass of 2 x 10^3 solar mass. We have also detected a 22 GHz water maser in the core, together with methanol maser emission, suggesting the core will host massive star formation. We hypothesise that the SiO emission arises from shocks associated with an outflow in the cold core.
Bains Indra
Burton Michael G.
Cunningham Maria
Garay Guido
Lo Nadia
No associations
LandOfFree
Detection of SiO emission from a massive dense cold core does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Detection of SiO emission from a massive dense cold core, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Detection of SiO emission from a massive dense cold core will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-453527