1. 3D Galactic Shock Wave at W43 in the 4-kpc Arm
Y. Sofue et al. 2017

2. 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.

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

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

5. What ISM physics? HI to H2 Transition

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

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

8. Bow Shocks and Theory
G30/W M83 bar+HII

9. How model?

10. Here
3D Structure
Evolves as