2007ApJ...660.1572G

We present the first high-resolution, ground-based observations of HCN and C₂H₂ toward the T Tauri binary star system GV Tau. We detected strong absorption due to HCN ν₃ and weak C₂H₂[ν₃and ν₂+(ν₄+ν₅)⁰₊] absorption toward the primary (GV Tau S) but not the infrared companion. We also report CO column densities and rotational temperatures, and present abundances relative to CO of HCN/CO∼0.6% and C₂H/CO∼1.2% and an upper limit for CH₄/CO<0.37% toward GV Tau S. Neither HCN nor C₂H₂ were detected toward the infrared companion, and results suggest that abundances may differ between the two sources.