Key points are not available for this paper at this time.
The "Clump 2" molecular cloud complex near the galactic center at (l, b, v ≈ (3°, +0°. 2, +20 to +150 km s-1) has been studied with the J = 1→0 rotational transitions of 12CO and 13CO and the J = 2→1 transition of CS. The molecular gas is distributed in a complex of 16 individual CS emitting cores, each having densities in excess of 2×104cm-3, and masses greater than 5×105Mₛun;. All the molecular emission is at velocities permitted by galactic rotation; the authors suggest that the extraordinary line width of the complex is the signature of a dust lane or inner spiral arm in a barlike potential.
Stark et al. (Tue,) studied this question.