TY - RPRT TI - A Method to Extract Spatially Resolved Polycyclic Aromatic Hydrocarbon Emission from Spitzer Spectra: Application to M51 AU - Zhang, Lulu AU - Ho, Luis C. AU - Xie, Yanxia PY - 2021 DO - 10.3847/1538-3881/abc693 UR - https://www.osti.gov/biblio/23159069 ID - 23159069 ER -