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

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

Mar 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000ap%26ss.271..171n&link_type=abstract

Astrophysics and Space Science, v. 271, Issue 2, p. 171-179 (2000).

Astronomy and Astrophysics

Astrophysics

2

Scientific paper

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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