N. D. Vagshette, M. B. Pandge, S. K. Pandey, M. K. Patil
We present the results based on multiwavelength imaging observations of the
prominent dust lane starburst galaxy NGC 1482 aimed to investigate the
extinction properties of dust existing in the extreme environment. (B-V)
colour-index map derived for the starburst galaxy NGC 1482 confirms two
prominent dust lanes running along its optical major axis and are found to
extend up to \sim 11 kpc. In addition to the main lanes, several filamentary
structures of dust originating from the central starburst are also evident.
Though, the dust is surrounded by exotic environment, the average extinction
curve derived for this target galaxy is compatible with the Galactic curve,
with RV =3.05, and imply that the dust grains responsible for the optical
extinction in the target galaxy are not really different than the canonical
grains in the Milky Way. Our estimate of total dust content of NGC 1482
assuming screening effect of dust is \sim 2.7 \times 10^5 Msun, and provide
lower limit due to the fact that our method is not sensitive to the intermix
component of dust. Comparison of the observed dust in the galaxy with that
supplied by the SNe to the ISM, imply that this supply is not sufficient to
account for the observed dust and hence point towards the origin of dust in
this galaxy through a merger like event. Our multiband imaging analysis reveals
a qualitative physical correspondence between the morphologies of the dust and
H{\alpha} emission lines as well as diffuse X-ray emission in this galaxy.
continue.... for more detail please see in pdf file.
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http://arxiv.org/abs/1202.2434
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