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High Resolution 4.8 Ghz Mapping of H2CO using the Westerbork Synthesis Radio Telescope

Published online by Cambridge University Press:  14 August 2015

J. R. Forster ,
W. M. Goss ,
T. De Jong ,
C. A. Norman ,
H. J. Habing  and
H. R. Dickel
J. R. Forster
Affiliation:
1. Netherlands Foundation for Radio Astronomy, Dwingeloo
W. M. Goss
Affiliation:
2. Kapteyn Astronomical Institute, Groningen
T. De Jong
Affiliation:
3. Astronomical Institute, Amsterdam
C. A. Norman
Affiliation:
4. Sterrenwacht, Leiden
H. J. Habing
Affiliation:
4. Sterrenwacht, Leiden
H. R. Dickel
Affiliation:
5. University of Illinois, Urbana, USA.

Extract

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We mapped the distribution of 6 cm H2CO (110→111) absorption against the HII regions DR21 and W58 with an angular resolution of 6″8 (RA) and a velocity resolution of 0.73 km s-1. The Westerbork SRT was used with the newly completed 5120 channel digital line receiver. With all 14 telescopes, a maximum baseline of 1440 m, both linear polarizations and a bandwidth per channel of 10 kHz the rms noise in the channel maps was about 7 K. The goal of this work is to measure scale sizes of H2CO in molecular clouds near HII regions and to study the kinematics of the clouds in the molecular line.

Type
Research Article
Information
Symposium - International Astronomical Union , Volume 87: Interstellar Molecules , 1980 , pp. 95 - 98
Copyright
Copyright © Reidel 1980 

References

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