The Vertical Distribution of Material
in Spiral Galaxies
Vertical Distribution of Material
in Sprial Galaxies
H I scale height: 140 pc
Stellar scale height: 310 pc
Typical H I "Supershell" Diameter: ~50 pc (These supershells are allegedly formed
when many SNe go off over a short stretch of time, causing a large bubble
of hot gas to sweep up the cold gas around it.)