Spectral synthesis analysis of TOI-1759. Black points show the normalized template SPIRou spectrum of TOI-1759, and the red line shows the best-fit synthetic spectrum with T_eff = 4036 ± 100 K, log g = 5.1 ± 0.6 dex, and [M/H] = +0.2 ± 0.3 dex. The vertical blue lines show the positions of the lines of the main chemical species (as indicated on the labels) considered in our analysis. Our analysis included a total of 10242 lines within the spectral range 1137–1169 nm. Solid green lines show the residuals (observed minus synthetic).