Bistability in dark cloud chemistry
Bistability in dark cloud chemistry
复制标题
暗云化学中的双稳定性
DOI：
10.1086/187077
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发表时间：
1993
期刊：
影响因子：
--
通讯作者：
P. Schilke
中科院分区：
文献类型：
--
作者：
J. L. Bourlot;G. Forêts;È. Roueff;P. Schilke
在这封信中，我们首次报道了暗星际云中的双稳态化学溶液。讨论集中在电离度和C/CO比等例子上，但所有的化学丰度都是涉及到的。我们考虑了密度和温度的作用，并探索了在星际条件下发生双稳时这些参数的相关范围。然后根据两种稳态解的时间演化对结果进行了讨论，这两种稳态解被称为低电离阶段和高电离阶段(LIP和HIP)。指出非线性星际化学方程具有双稳性
In this Letter we present the first report of a double steady state chemical solution in dark interstellar clouds. The discussion focuses on examples such as the degree of ionization and the C/CO ratio, but all the chemical abundances are concerned. The role of density and temperature is considered, and we explore the relevant range of these parameters where bistability occurs under interstellar conditions. The results are then discussed in terms of time evolution toward the two steady state solutions which are referred to as a low- and a high-ionization phase (LIP and HIP). We point out that the nonlinear interstellar chemical equations have the intrinsic property of bistability