3D Galactic Shock Wave at W43 in the 4-kpc Arm Y. Sofue et al. 2017

What. 3D gal. shock in 4kpc Arm. Where. Around W43. How What? 3D gal. shock in 4kpc Arm. Where? Around W43. How? Bow shock concave to W43.

Bow shock at G30 found by 45m 10 GHz => Revealed by FUGIN in CO.

Size? 10x100 pc Mass? Molecular 1.2x10^6 Msun HII 2x10^4 Msun.

What ISM physics? HI to H2 Transition

HI to H2 Transition in the Gal. Shock Jump of Mol. Fraction

What physics? Hydraulic jump + Shock =>Disk thickness jump

Bow Shocks and Theory G30/W43 M83 bar+HII

How model?

Here 3D Structure Evolves as