Astronomy and Astrophysics – Astrophysics
Scientific paper
2001-08-06
Astronomy and Astrophysics
Astrophysics
Accepted for publication in Journal of Astrophysics and Astronomy (20 pages including 8 figures & 3 tables)
Scientific paper
10.1007/BF02702255
Three Galactic star forming regions associated with W3(OH), S209 and S187 have been simultaneously mapped in two trans-IRAS far infrared (FIR) bands centered at ~ 140 and 200 micron using the TIFR 100 cm balloon borne FIR telescope. These maps show extended FIR emission with structures. The HIRES processed IRAS maps of these regions at 12, 25, 60 & 100 micron have also been presented for comparison. Point-like sources have been extracted from the longest waveband TIFR maps and searched for associations in the other five bands. The diffuse emission from these regions have been quantified, which turns out to be a significant fraction of the total emission. The spatial distribution of cold dust (T < 30 K) for two of these sources (W3(OH) & S209), has been determined reliably from the maps in TIFR bands. The dust temperature and optical depth maps show complex morphology. In general the dust around S209 has been found to be warmer than that in W3(OH) region.
Ghosh Sanjay K.
Mookerjea Bhaswati
Rengarajan T. N.
Tandon Shyam N.
Verma Ram Prakash
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