Publication Abstracts

Cummins et al. 1983

Cummins, S.E., S. Green, P. Thaddeus, and R.A. Linke, 1983: The kinetic temperature and density of the Sagittarius B2 molecular cloud from observations of methyl cyanide. Astrophys. J., 266, 331-338, doi:10.1086/160782.

From observations with the Bell Laboratories 7 m telescope of the K components of the CH3CN J = 4→3 rotational transition at 73.6 GHz, 6→5 transition at 110.4 GHz, and 7→6 transition at 128.7 GHz, a mean kinetic temperature of 85±10 K and a mean H2 density of (1.1±0.5)×105 /cm3 are deduced for the central 2' of the Sgr B2 molecular cloud. Within the K = 0-4 ladders of CH3CN in Sgr B2 the populations of the radiatively coupled J levels are relaxed, with a rotational temperature of approximately 16 K — similar to that of several linear molecules.

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BibTeX Citation

@article{cu03000u,
  author={Cummins, S. E. and Green, S. and Thaddeus, P. and Linke, R. A.},
  title={The kinetic temperature and density of the Sagittarius B2 molecular cloud from observations of methyl cyanide},
  year={1983},
  journal={Astrophys. J.},
  volume={266},
  pages={331--338},
  doi={10.1086/160782},
}

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RIS Citation

TY  - JOUR
ID  - cu03000u
AU  - Cummins, S. E.
AU  - Green, S.
AU  - Thaddeus, P.
AU  - Linke, R. A.
PY  - 1983
TI  - The kinetic temperature and density of the Sagittarius B2 molecular cloud from observations of methyl cyanide
JA  - Astrophys. J.
VL  - 266
SP  - 331
EP  - 338
DO  - 10.1086/160782
ER  -

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