Map and spectral lines of the NH₃ (1,1). Top panel: velocity-integrated intensity map of the NH₃ (1,1) main group of hyperfine components with an integration range of 20–26 km s^–1. Six red circles mark the six main regions; each circle has a diameter of 3.33′. The inset shows the NH₃(2,2) spectrum of Region 1. The p₁, p₂, and p₃ represent the peak intensity in K, the line center velocity in km s^–1, and the line width in km s^–1, respectively. The black circle in the lower-left corner represents the beam size. Bottom panel: Ammonia (1,1) spectra for the six regions. The p₂, p₃, and p₄ represent the line center velocity (V_lsr) in km s^–1, the line width (ΔV) in km s^–1, and the main group peak optical depth (τ_main), respectively. p₁ = A₀ × τ_main, where A₀ is an arbitrary amplitude in units of K. Although A₀ is an arbitrary amplitude, when τ_main ≪ 1, A₀ corresponds to the main group peak intensity.