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1 results

  • The thermal state of molecular clouds in the Galactic center: evidence for non-photon-driven heating

  • Y. Ao, C. Henkel, K. M. Menten, M. A. Requena-Torres, T. Stanke, R. Mauersberger, S. Aalto, S. Mühle, J. Mangum
  • Journal:
    Proceedings of the International Astronomical Union / Volume 9 / Issue S303 / October 2013
    Published online by Cambridge University Press:
    22 May 2014, pp. 89-91
    Print publication:
    October 2013
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  • We have used the Atacama Pathfinder Experiment (APEX) 12 m telescope at 218 GHz to observe molecular clouds simultaneously in the JKaKc = 303→202, 322→221, and 321→220 transitions of para-H2CO to determine kinetic temperatures of the dense gas in the central molecular zone of the Galaxy. Gas kinetic temperatures for individual molecular clouds range from 55 to 125 K or even higher. The molecular clouds at high temperatures may be heated by turbulent dissipation and/or cosmic-rays.