Upper limits on CH${}_3$OH in the HD 163296 protoplanetary disk: evidence for a low gas-phase CH${}_3$OH/H${}_2$CO ratio

M. T. Carney, M. R. Hogerheijde, V. V. Guzmán +6

Methanol (CH${}_3$OH) is at the root of organic ice chemistry in protoplanetary disks. However, its weak emission has made detections difficult. To date, gas-phase CH${}_3$OH has been…