Can I read Self-generated ultraviolet radiation in molecular shock waves II. CH+ and the interpretation of emission from shock ensembles on EtoBox?

Self-generated ultraviolet radiation in molecular shock waves II. CH+ and the interpretation of emission from shock ensembles by Lehmann, Andrew; Godard, Benjamin; Forêts, Gillaume Pineau des; Vidal-García, Alba; Falgarone, Edith is a scholarly article available to read on EtoBox.

What is Self-generated ultraviolet radiation in molecular shock waves II. CH+ and the interpretation of emission from shock ensembles about?

Shocks, modelled over a broad range of parameters, are used to construct a new tool to deduce the mechanical energy and physical conditions from observed atomic or molecular emission lines. We compute magnetised, molecular shock models with velocities $V_s=5$-$80$ km s$^{-1}$, preshock proton densities $n_{\rm H}=10^2$-$10^6$ cm$^{-3}$, weak or moderate magnetic field strengths, and in the absence or presence of an external UV radiation field. We develop a simple emission model of an ensemble of shocks for connecting any observed emission lines to the mechanical energy and physical conditions of the system. For this range of parameters we find the full diversity (C-, C$^*$-, CJ-, and J-type) of magnetohydrodynamic shocks. H$_2$ and H are dominant coolants, with up to 30% of the shock kinetic flux escaping in Ly$\alpha$ photons. The reformation of molecules in the cooling tail means H$_2$ is even a good tracer of dissociative shocks and shocks that were initially fully atomic. For each shock model we provide integrated intensities of rovibrational lines of H$_2$, CO, and CH$^+$, atomic H lines, and atomic fine-structure and metastable lines. We demonstrate how to use these shock mod

Author

Lehmann, Andrew; Godard, Benjamin; Forêts, Gillaume Pineau des; Vidal-García, Alba; Falgarone, Edith

Published

2021

Language

EN