Program: GN-2009B-Q-105

M82 is the prototypical starburst-driven galactic wind, and is an excellent nearby laboratory for studying wind physics. The molecular phase of the wind, where much of the mass may reside, has been recently measured at large galactocentric distances. However, velocity information about the dusty phase and warm molecular phase is lacking, preventing a complete understanding of the energies involved. We propose to measure the velocity of warm H_2 gas in the wind of M82 using NIRI spectroscopy. The sensitivity of Gemini will allow us to probe the faint, extended gas in the wind.