Molecular Column Densities Near the Center of the Milky Way Molecular Column Densities Near the Center of the Milky Way

CO (J = 4 CO (J = 4→3), 3), 12 12 CO (J = 7 CO (J = 7→6) and (CI) ( 6) and (CI) ( 3 P 1 → 3 P 0 ). Analyzing our ). Analyzing our data in conjunction with (J = 1 data in conjunction with (J = 1→0) 0) 12 12 CO and CO and 13 13 CO data previously CO data previously observed with the Bell Laboratories 7-m antenna, we calculated the observed with the Bell Laboratories 7-m antenna, we calculated the molecular gas density as a function of position and velocity using molecular gas density as a function of position and velocity using the varying value of T the varying value of T 12 12 7→6 /T /T 12 12 4→3 and an estimate of and an estimate of τ 12 12 1→0 .