¹³CO channel maps for the ﹩{\dot{M}}_{{\rm{in}}}=1{0}^{-8}\,{M}_{\odot }\,{{\rm{yr}}}^{-1}﹩ model at t = 8 kyr. The top, middle, and bottom panels show the synthetic observations, the best-fitting Keplerian model, and the residuals obtained by subtracting the model from the synthetic data, respectively. The residual maps reveal several signatures of streamer accretion, including the primary spiral arm (solid), the crescent-shaped structure (dashed), and the combined effects of the eccentric disk and disk warp (dotted–dashed).