Fig. 3
Top: longitude-velocity diagram of HCO+ emission from
the CMZ and PMZ covering the whole survey in the latitude range between
to 
. The contour levels start at 0.021 K
(3σ), and increase in steps of 0.058 K (8σ).
Middle: longitude-velocity diagram of SiO emission from the CMZ
and PMZ covering the whole survey in the latitude range between
to 
. The contour levels start at 0.01 K
(3σ), and increase in steps of 0.018 K (5σ).
Bottom: longitude-velocity diagram of
H13CO+ emission from the CMZ and PMZ covering the whole
survey in the latitude range between to . The contour levels start at 0.009 K
(3σ), and increase in steps of 0.016 K (5σ).
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