The Milky Way
Contents
1. The Milky Way¶
1.1. Components¶
Disk
\(M_\star \sim 6 \times 10^{10} M_\odot\)
Cold gas mass is \(5\times 10^{10} M_\odot\)
20% is H2 and associated with star formation
80% of gas is HI and often thought of as reservoirs for future star formation
Youngest stars are about a million years old
Radial metallicity gradient
Thin Disk
\(M_\star \sim 5\times 10^{10} M_\odot\)
Radial scale height of 0.3 kpc, vertical scale height of 0.3 kpc
Mixed aged populatiion
Thick Disk
Dark Matter Halo
Virial radius of about 150 kpc
\(M_{DM} \sim 10^{12} M_\odot\)
