Abstract
A survey of dense cores in nearby dark clouds indicates that the J=4→3 transition of HC 3 N is a good tracer of very quiescent, dense gas. High spectral resolution observations at 12 positions show the line to have a median intrinsic velocity dispersion of 0.088 km s −1 as compared to 0.100 km s −1 for new high spectral resolution measurements of the NH 3 (1, 1) transition at the same positions. The narrowest HC 3 N line has an observed FWMH of only 0.14 km s −1 , corresponding to an intrinsic velocity dispersion of only 0.058±0.002 km s −1
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
