Individual CO J components profiles contributing to the line intensity of the first CO bandhead (υ = 2–0) for wavelengths ranging from 2.302 to 2.309 μm at a spectral resolution R = 100 000. Models computed for intrinsic line widths of Δv = 5 km s⁻¹ (blue solid line), and Δv = 15 km s⁻¹ (red solid line), and fixed values of T = 2400 K, N_CO = 4 × 10²¹ cm⁻², and v_rot sini = 130 km s⁻¹ are shown. To facilitate comparison, the model with Δv = 5 km s⁻¹ has been scaled-up to match the peak intensity of the J components with higher Δv value.