Resolution effects affecting the identification of spectral line components at different resolutions: θFWHM = 4.5′′ (native; upper panel), θFWHM = 30′′ (mid panel), and θFWHM = 50′′ (lower panel). For comparison, all spectra include the same noise level. We note how the three original velocity components, clearly detected in the N2 H+ isolated hyperfine line at the native resolution (gray dashed lines), are progressively diluted and blended when convolved into larger beams. In particular, we note that most of the original line multiplicity is lost at the typical resolution of single-dish observations (mid panel; e.g. Hacar et al. 2017b).
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