Abstract:
Midcourse Space Experiment (MSX) has surveyed the Galactic
plane in four infrared bands between 6 and 25 /Lm, two of which cover several
Unidentified Infrared emission Bands (UIBs). A scheme has been developed to
extract the spatial distribution of the UIB emission using the MSX data. The
observations have been modelled by two components: (i) the emission in urns
and (ii) an underlying thermal continuum (gray body) from the interstellar
dust. The reliability of the scheme has been successfully verified by comparing
the results for a sample of five Galactic compact H II regions (Sh-61, Sh-138,
Sh-152, Sh-156, Sh-186) for which ISOCAM images in some individual UIBs
are available. Our scheme demonstrates the usefulness of the MSX database
for study of large scale spatial distribution of VIB emission (and the carriers of
UIBs) in the entire Galactic plane.
