Probing the infrared counterparts of diffuse far-ultraviolet sources in
  the Galaxy
  Recent availability of high quality infrared (IR) data for diffuse regions in
the Galaxy and external galaxies have added to our understanding of
interstellar dust. A comparison of ultraviolet (UV) and IR observations may be
used to estimate absorption, scattering and thermal emission from interstellar
dust. In this paper, we report IR and UV observations for selective diffuse
sources in the Galaxy. Using archival mid-infrared (MIR) and far-infrared (FIR)
observations from Spitzer Space Telescope, we look for counterparts of diffuse
far-ultraviolet (FUV) sources observed by the Voyager, Far Ultraviolet
Spectroscopic Explorer (FUSE) and Galaxy Evolution Explorer (GALEX) telescopes
in the Galaxy. IR emission features at 8micron are generally attributed to
Polycyclic Aromatic Hydrocarbon (PAH) molecules, while emission at 24micron are
attributed to Very Small Grains (VSGs). The data presented here is unique and
our study tries to establish a relation between various dust populations. By
studying the FUV-IR correlations separately at low and high latitude locations,
we have identified the grain component responsible for the diffuse FUV
emission.
