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

Journal of astrophysics and astronomy

B. Mookerjea1²  T. N. Rengarajan¹  S. K. Ghosh1 2²  S. N. Tandon³  R. P. Verma² 

[1] Department of Physics, Nagoya University, Nagoya 464-8602, Japan.$$;Tata Institute of Fundamental Research, Bombay 400 005, India.$$;Inter-University Centre for Astronomy & Astrophysics, Pune 411 007, India.$$

关键词: Interstellar dust;    W3(OH);    S209;    S187.;   

DOI  :  

学科分类：天文学(综合)

来源: Indian Academy of Sciences

【 摘 要 】

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 & 100 𝜇m 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.

【 授权许可】

Unknown