Overview of the gas bridge. In the central panels, a zoom-in of the integrated-intensity maps (Fig. 2) is shown in color (top: DCN 3–2, middle: HC₃N 24–23, and bottom: CH₃OH 4_2,3 −3_1,2 E). The synthesized beam of the line and continuum data is shown in the bottom left and right corners, respectively. A scale bar is presented in the top left corner. The dashed gray ellipse shows the area that is covered by the gas bridge in which the kinematic analysis was conducted. We label the positions for which spectra are shown in the left and right panels in pink (black: DCN 3–2, orange: HC₃N 24–23, and blue: CH₃OH 4_2,3 − 3_1,2 E). The dashed vertical gray and orange lines indicate the source velocity of IRS3A and IRS3B, respectively.