Shock waves and the chemical structure of interstellar clouds

An ab initio study of the rovibronic spectrum of sulphur monoxide (SO): diabatic vs. adiabatic representation

“…The final SO line list will have applications primarily in the atmospheric modelling of exoplanets [81][82][83] and cool stars. Further applications of this empirical SO line list will be in shock zone modelling, 11,12,84 SO lasing systems, 7,8 and spectroscopy of Venus 85,86 and Io. 87,88 ffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffi ffi…”

“…8 SO also has astrophysical importance, its Zeeman splitting has been used to probe the magnetic fields of dense star-forming regions, such as the Orion molecular cloud, for field strengths Z10 À2 G 9,10 and its presence within warm chemistry's mean it is an excellent shock tracer. 11,12 The frontier orbitals of SO resemble that of carbon monoxide where the two p* valence electrons mean SO has a X 3 S À ground state similar to O 2 and S 2 . Being isoelectronic with O 2 , SO has two low-lying metastable a 1 D and b 1 S + states which are relatively short lived due to large spin-orbit coupling.…”

“…8 SO also has astrophysical importance, its Zeeman splitting has been used to probe the magnetic fields of dense star-forming regions, such as the Orion molecular cloud, for field strengths ≥10 −2 G 9,10 and its presence within warm chemistry's mean it is an excellent shock tracer. 11,12…”

An ab initio study of the rovibronic spectrum of sulphur monoxide (SO): diabatic vs. adiabatic representation

“…The final SO line list will have applications primarily in the atmospheric modelling of exoplanets [81][82][83] and cool stars. Further applications of this empirical SO line list will be in shock zone modelling 11,12,84 , SO lasing systems 7,8 , and spectroscopy of Venus 85,86 and Io 87,88 .…”

“…8 SO also has astrophysical importance, its Zeeman splitting has been used to probe the magnetic fields of dense star-forming regions, such as the Orion molecular cloud, for field strengths ≥ 10 −2 G 9,10 and its presence within warm chemistry's mean it is an excellent shock tracer. 11,12 The frontier orbitals of SO resemble that of carbon monoxide where the two π * valence electrons mean SO has a X 3 Σ − ground state similar to O 2 and S 2 . Being isoelectronic with O 2 , SO has two low-lying metastable a 1 ∆ and b 1 Σ + states which are relatively short lived due to large spin-orbit coupling.…”