# # Program information file # PROGRAM_ID 2022B988 PROGRAM_TITLE Formaldehyde in YSOs PROGRAM_INV1 Adwin Boogert PROGRAM_INV2 PROGRAM_INV3 PROGRAM_INV4 PROGRAM_INV5 PROGRAM_SCICAT galactic/interstellar medium PROGRAM_ABSTRACT_BEG We propose to use iSHELL/IRTF to observe the nu1 C-H stretch mode of gas phase H2CO near 3.60 micron and determine its column density and excitation temperature towards a sample of massive protostellar envelopes. PROGRAM_ABSTRACT_END