Abstract:
Simultaneous far-infrared observations at 130 and 200 pm of
the southern Galactic star forming regions (associated with mAS 12326-6245,
IRAS 17059-4132, !RAS 17160-3707 & IRAS 17233-3606) have been carried out
using the TIFR 100 cm balloon-borne telescope. These far-infrared maps have
a resolution of '" 1 arc min and show extended emission. Nearly identical beams
in the two far-infrared bands have enabled us to determine the dust temperature
and optical depth distribution in the star forming regions. The TIFR bands are
sensitive to the distribution of cold « 30 K) dust. HIRES processed 1roages
in four IRAS bands at 12, 25, 60 and 100 pm and the mid-infrared images
from the MSX mission at 8.3, 12.1, 14.7 and 21.3 I'm have also been compared.
Radiative transfer models have been explored to fit available observations (viz.
SED, angular Si7£, etc) to extract various physical parameters of these star
forming regions.
