Low resolution at ∼ 0.19″ of the velocity field (left), and the density (middle) of the HCO⁺(4–3) line in NGC 613, compared with the high resolution at ∼ 0.015” (right) of the velocity field. In the right panel, the contours of the low resolution HCO⁺(4–3) map are superposed. The color scale is in velocity difference from the V_sys= 1481 km s⁻¹. The spatial scales of all panels are RA-Dec in arc seconds, from the center of Table 1.