The Dust Content and Radiation Fields of Sample of Galaxies in the
  ELAIS-N1 Field
  The Mid-IR colors ($F_{8}/F_{24}$) of galaxies together with their IR-UV
luminosity correlations can be used to get some insight into the relative
abundance of the different dust grain populations present in them. The ELAIS-N1
field contains thousands of galaxies which do not have optical spectra but have
been observed in the Mid-IR by {\it Spitzer} and UV by {\it GALEX} making it
ideal for these studies. As part of this work we have selected a sample of
galaxies from the ELAIS-N1 field which have photometric observations in the MIR
and UV as well as photometric redshifts from the SDSS database. We put the
constraint that the redshifts are $\le$ 0.1, thereby giving us a total of 309
galaxies. We find that the majority of the galaxies in the sample are PAH
dominated due to their high MIR flux ratio. We also find a reasonable
correlation between the Mid-IR and the UV luminosities out of which the Mid-IR
emission from PAHs at 8 $\mu$m is marginally better correlated than the 24
$\mu$m VSG emission with the UV luminosities. However, if we divide the sample
based on their $F_{8}/F_{24}$ ratios which is also an indicator of metallicity,
the MIR-UV correlation seems to increase with the $F_{8}/F_{24}$ ratio. But the
MIR-UV correlations are not very different for the PAHs and the VSG population
within the individual metallicity groups.
