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How do the shock waves affect the chemical evolution of interstellar medium or circumstellar medium of evolved stars etc?

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  • $\begingroup$ What shock waves? $\endgroup$ – Carl Witthoft Feb 13 at 16:25
  • $\begingroup$ @CarlWitthoft the one sentence question clearly asks about "shock waves...of interstellar medium or circumstellar medium". In what way is your comment constructive? cf. 1, 2, 3 $\endgroup$ – uhoh 2 days ago
  • $\begingroup$ Ouch! Anyway, I think the correction partition of the sentence is "shock waves" and "chemical evolution of interstellar ..." $\endgroup$ – Kornpob Bhirombhakdi 2 days ago
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    $\begingroup$ @uhoh I"m asking what the source & type of shock wave: gravitational, radiative particles, etc. $\endgroup$ – Carl Witthoft 2 days ago
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This is a good question, and probably there is no certain answer right now. Also, the impacts of shock waves depend on what scenarios we are talking about.

For an example in the case of supernovae, especially in Type II (H-rich), the shock wave forms double structures: forward and reverse shocks. Area in between the shocks can sometimes form a small region that supports cooling and dust forming, therefore, enhances the chemical evolution. However, if we think about the shocks blowing circumstellar materials out into the void, the shocks slow down chemical evolution.

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