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Far Infrared Mapping of Three Galactic Star Forming Regions: W3(OH), S209 & S187

Ghosh, SK and Mookerjea, B and Rengarajan, TN and Tandon, SN and Verma, RP (2001) Far Infrared Mapping of Three Galactic Star Forming Regions: W3(OH), S209 & S187. In: Journal of Astrophysics and Astronomy, 22 (2). pp. 173-185.


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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 200µm using the TIFR 100 cm balloon borne FIR telescope. These maps showextended FIR emission with structures. The HIRES processed IRAS maps of these regions at 12, 25, 60 & 100µm 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.

Item Type: Journal Article
Publication: Journal of Astrophysics and Astronomy
Publisher: Indian Academy of Sciences
Additional Information: Copyright of this article belongs to Indian Academy of Sciences.
Keywords: Interstellar dust;W3(OH);S209;S187
Department/Centre: Division of Physical & Mathematical Sciences > Joint Astronomy Programme
Date Deposited: 16 Sep 2004
Last Modified: 19 Sep 2010 04:16
URI: http://eprints.iisc.ac.in/id/eprint/1912

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