Far infrared mapping of three Galactic star forming regions: W3(OH), S209 & S187

Ghosh, S. K. ; Mookerjea, B. ; Rengarajan, T. N. ; Tandon, S. N. ; Verma, R. P. (2001) Far infrared mapping of three Galactic star forming regions: W3(OH), S209 & S187 Journal of Astrophysics and Astronomy, 22 (2-3). pp. 173-185. ISSN 0250-6335

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Official URL: http://www.ias.ac.in/jaa/Sept2001/pdf/jaa22p173-18...

Related URL: http://dx.doi.org/10.1007/BF02702255

Abstract

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 show extended FIR emission with structures. The HIRES processed IRAS maps of these regions at 12, 25, 60 & 100 ìm 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:Article
Source:Copyright of this article belongs to Indian Academy of Sciences.
Keywords:Interstellar Dust; W3(OH)-S209; S187
ID Code:97165
Deposited On:23 Jan 2013 09:15
Last Modified:19 May 2016 09:22

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