Publications (15)
The NHD hyperfine structure revealed by astrophysical observations
F. Daniel, L. H. Coudert, A. Punanova +8
The 1-1 lines of ortho and para--NHD (o/p-NHD), respectively at 86 and 110 GHz, are commonly observed to provide constraints on the deuterium fractionation in…
Deuterium Fractionation in the Ophiuchus Molecular Cloud
A. Punanova, P. Caselli, A. Pon +2
Aims. We measure the deuterium fraction, RD, and the CO-depletion factor, fd, toward a number of starless and protostellar cores in the L1688 region of the Ophiuchus molecular clou…
Similar complex kinematics within two massive, filamentary infrared dark clouds
A. T. Barnes, J. D. Henshaw, P. Caselli +5
Infrared dark clouds (IRDCs) are thought to be potential hosts of the elusive early phases of high-mass star formation. Here we conduct an in-depth kinematic analysis of one such I…
Submillimeter Observations of the Quiescent Core - Ophiuchus A-N6
A. Pon, R. Plume, R. K. Friesen +3
We have observed the Oph A-N6 prestellar core in the following transitions: N2D+ J=3 to 2, DCO+ J=3 to 2 and J=5 to 4, HCO+ J=3 to 2, CS J=5 to 4 and J=7 to 6, and H13CO+ J=3 to 2…
Seeds of Life in Space (SOLIS) III. Formamide in protostellar shocks: evidence for gas-phase formation
C. Codella, C. Ceccarelli, P. Caselli +47
Context: Modern versions of the Miller-Urey experiment claim that formamide (NHCHO) could be the starting point for the formation of metabolic and genetic macromolecules. Intri…
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…