N₂H⁺ spectra observed toward G92.04+3.93, G93.21+9.55, G98.00+8.75, G105.57+10.39, and G132.12+8.95. The field G86.97–4.06 is shown in Fig. 3. The red dashed line is the fit to the hyperfine spectra and the lower subframe shows the fit residuals. The main beam temperature of the 23−12 component, the fitted radial velocity, the FWHM line width (km s^-1), and the residual rms noise (as main beam temperature) are given in the frames.