# # Program information file # PROGRAM_ID 2021B092 PROGRAM_TITLE An iSHELL survey of CO spectra in Protoplanetary Disks PROGRAM_INV1 Andrea Banzatti PROGRAM_INV2 Kirsten Abernathy PROGRAM_INV3 Erika Marentes PROGRAM_INV4 Sean Brittain PROGRAM_INV5 Adwin Boogert PROGRAM_SCICAT extra-solar planets PROGRAM_ABSTRACT_BEG We propose a magnitude-limited survey of CO gas in Protoplanetary Disks observable with iSHELL, to provide a spectral database with high and lasting value to the community. We use iSHELL with its high-resolution slits [0.375' and 0.75'] to cover M band [4.52-5.25 um] emission from CO gas in nearby protoplanetary disks visible in this semester. This program complements data that we have already obtained in previous semesters to reach a total sample of ~50 disks [mostly around intermediate-mass stars, but now expanding toward solar-mass stars], and will provide a high-quality homogeneous dataset at high spectral resolution and high signal-to-noise. This dataset will enable multiple investigations crossing fields of disks, winds, and exoplanets, to study the structure, kinematics, composition, and evolution of the inner 10 au in Protoplanetary Disks. These data and investigations are particularly timely and important to complement extensive imaging campaigns that are now observing all bright disks at optical, infrared, and millimeter wavelengths, looking for structures and planets forming in their outer regions [> 10 au]. PROGRAM_ABSTRACT_END