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Bistability and Temperature Effects in Mixing Layers Between Molecular and Ionized Regions

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Abstract

We propose a simple method of assessing the chemical consequences of mixing at interfaces between cool neutral gas with ionized material. It is shown that the temperature within the interface has a significant effect; at low temperatures (∼ 10 K) the chemistry is significantly suppressed, but for temperatures above 100 K the chemistry initiated by proton/O-atom charge exchange gives rise to a rich and abundant chemistry. The chemical state of the cool neutral gas has an important consequence for the interface. A mainly molecular cool gas can give rise to a high ionization state in the interface; this high ionization state appears stable against parameter variations. C2H is one of the most easily observed molecules having a high abundance in some interfaces.

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References

  • Charnley, S.B., Hartquist, T.W., Dyson, J.E. and Williams, D.A.: 1990, Mon.Not.R.Astron.Soc. 243, 405.

    ADS  Google Scholar 

  • Duley, W.W., Hartquist, T.W., Sternberg, A., Wagenblast, R. and Williams, D.A.: 1992, Mon.Not.R.Astron.Soc. 255, 463.

    ADS  Google Scholar 

  • Hartquist, T.W., Dyson, J.E. and Williams, D.A.: 1992, Mon.Not.R.Astron.Soc. 257, 419.

    ADS  Google Scholar 

  • Howe, D.A., Taylor, S.D. and Williams, D.A.: 1996, Mon.Not.R.Astron.Soc. 279, 143.

    ADS  Google Scholar 

  • Le Bourlot, J., Pineau des Forets, G., Roueff, E. and Schilke, P.: 1993, Astrophys.J. 416, L87-L90.

    Article  ADS  Google Scholar 

  • Le Bourlot, J., Pineau des Forets, G. and Roueff, E.: 1995, Astron.Astrophys. 119, 111.

    Google Scholar 

  • Lee, H.-H., Roueff, E., Pineau des Forets, G., Shalabiea, O.M., Terzieva, R. and Herbst, E.: 1998, Astron.Astrophys. 334, 1047.

    ADS  Google Scholar 

  • Nejad, L.A.M. and Hartquist, T.W.: 1994, Astrophys.Space Sci. 220, 253.

    Article  ADS  Google Scholar 

  • Pineau des Forets, G., Roueff, E. and Flower, D.R.: 1992, Mon.Not.R.Astron.Soc. 258, 45.

    ADS  Google Scholar 

  • Rawlings, J.M.C. and Hartquist, T.W.: 1997, Astrophys.J. 487, 672.

    Article  ADS  Google Scholar 

  • Taylor, S.D. and Raga, A.C.: 1995, Astron.Astrophys. 296, 823.

    ADS  Google Scholar 

  • Taylor, S.D., Morata, O. and Williams, D.A.: 1996, Astron.Astrophys. 313, 269.

    ADS  Google Scholar 

  • Willacy, K. and Williams, D.A.: 1993, Mon.Not.R.Astron.Soc. 260, 635.

    ADS  Google Scholar 

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Authors and Affiliations

  1. Department of Physics and Astronomy, University College London, Gower Street, London, WC1E 6BT, U.K.

    T.K. Nguyen & D.A. Williams

  2. Department of Physics and Astronomy, University of Leeds, Leeds, LS2 9JT, U.K.

    T.W. Hartquist

Authors
  1. T.K. Nguyen
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  2. T.W. Hartquist
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  3. D.A. Williams
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Nguyen, T., Hartquist, T. & Williams, D. Bistability and Temperature Effects in Mixing Layers Between Molecular and Ionized Regions. Astrophysics and Space Science 271, 171–179 (2000). https://doi.org/10.1023/A:1002486622577

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