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Cold Sources in Star Forming Regions

Published online by Cambridge University Press:  25 September 2002

M. Giard ,
J.P. Bernard ,
A. Klotz ,
I. Ristorcelli  and
R. P. Verma
R. P. Verma*
Affiliation:
Tata Institute of Fundamental Research, Homi Bhabha Road, Mumbai (Bombay) 400005, India
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Abstract

Infrared Astronomy Group of the Tata Institute ofFundamental Research (TIFR)has an ongoing programme of high resolution mapping of star forming regionsin two trans-IRAS far infrared bands using a 1 metre balloon-borne telescope. Thetelescope has been flown many times from TIFR Balloon Facility, Hyderabad,India. The photometer consists of two bolometer arrays cooled to 0.3 K by aclosed cycle liquid 3He refrigerator. The effective wavelengths of thetwo bands are ~140 and 200 μm and the angular resolution of theMEM deconvolved maps is ~1'.2. These bands are suitable for the study ofcold sources (temperature ≤30 K). Using this system many Galactic starforming regions have been mapped. Using simultaneous maps in the two bands,maps of dust temperature and optical depth have also been obtained. Our mapsare combined with other available data and radiation transfer calculationshave been made. In this paper we will describe the telescope and give asample of the results obtained for some of the star forming regions inthe Galaxy.

Type
Research Article
Information
European Astronomical Society Publications Series , Volume 4: Infrared and Submillimeter Space Astronomy: An International Colloquium to Honor the Memory of Guy Serra , 2002 , pp. 117
Copyright
© EAS, EDP Sciences, 2002

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