Stellar spectra near Lithium line (6707 A) for the HAT-P-4 A star

Stellar spectra near Lithium line (6707 A) for the HAT-P-4 A star (blue dotted line), which displays a higher Lithium abundance than the companion star (Black continuous line). Spectrum acquired using GRACES which uses fiber-fed light from the Gemini North telescope with the Canada-France-Hawaii Telescope’s ESPaDOnS Spectrograph.