Tracing PAH Emission in λ-Orionis Using COBE/DIRBE Data

We use archival COBE/DIRBE data to construct a map of polycyclic aromatic hydrocarbon (PAH) emission in the $\lambda$-Orionis region. The presence 3.3 $\mu$m PAH feature within DIRBE 3.5 band and corresponding lack significant spectral features adjacent bands (1.25, 2.2, 4.9 $\mu$m) enable estimation contribution data. Having shortest wavelength known features, probes smallest PAHs, which are also leading candidates for carriers anomalous microwave (AME). this investigate association between AME from molecules. find that spatial correlation is higher far-infrared dust (as represented by 240 map) than it our AME. This finding, agreement with previous studies using at longer wavelengths, tension hypothesis due spinning PAHs. However, expected mid-infrared could potentially be degraded different sensitivities each mechanism local environmental conditions even if PAHs both.