Publications (5)
Mid-J CO Shock Tracing Observations of Infrared Dark Clouds I
A. Pon, P. Caselli, D. Johnstone +5
Infrared dark clouds (IRDCs) are dense, molecular structures in the interstellar medium that can harbour sites of high-mass star formation. IRDCs contain supersonic turbulence, whi…
Parsec-scale SiO Emission in an Infrared Dark Cloud
I. Jimenez-Serra, P. Caselli, J. C. Tan +4
We present high-sensitivity 2'x4' maps of the J=2-1 rotational lines of SiO, CO, 13CO and C18O, observed toward the filamentary Infrared Dark Cloud (IRDC) G035.39-00.33. Single-poi…
Deuteration as an evolutionary tracer in massive-star formation
F. Fontani, Aina Palau, P. Caselli +7
Theory predicts, and observations confirm, that the column density ratio of a molecule containing D to its counterpart containing H can be used as an evolutionary tracer in the low…
Mid-J CO Shock Tracing Observations of Infrared Dark Clouds III: SLED fitting
A. Pon, M. J. Kaufman, D. Johnstone +6
Giant molecular clouds contain supersonic turbulence that can locally heat small fractions of gas to over 100 K. We run shock models for low-velocity, C-type shocks propagating int…
Mid-J CO shock tracing observations of infrared dark clouds II Low-J CO constraints on excitation, depletion, and kinematics
A. Pon, D. Johnstone, P. Caselli +6
Infrared dark clouds are kinematically complex molecular structures in the interstellar medium that can host sites of massive star formation. We present 4 square arcminute maps of…