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The Korean Astronomical Society (한국천문학회)
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OBSERVATIONAL TEST STUDY OF TRAO OUTER GALAXY SURVEY COMPARING TO FCRAO OUTER GALAXY SURVEY

대덕전파천문대와 FCRAO의 외은하탐사 비교관측연구

  • Lee, Y. (Korea Astronomy and Space Science Institute) ;
  • Jung, J.H. (Korea Astronomy and Space Science Institute) ;
  • Kang, H.W. (Korea Astronomy and Space Science Institute) ;
  • Lee, C.H. (Korea Astronomy and Space Science Institute) ;
  • Kim, H.G. (Korea Astronomy and Space Science Institute) ;
  • Kim, I.S (Korea Astronomy and Space Science Institute) ;
  • Kim, B.G. (Korea Astronomy and Space Science Institute)
  • Received : 2009.12.21
  • Accepted : 2010.03.08
  • Published : 2010.03.31
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Abstract

We present results of a test-study of the large-scale survey using the multi-beam receiver system recently installed on the 14 m telescope at Taeduk Radio Astronomy Observatory (TRAO). We have tested several modes of mapping, and found suitable (time-saving) mapping parameters of 'ON-SOURCE' = 8, 'OFF-SOURCE' = 1 when using 'RPT' = 3 as a position-switching mode. We observed 504 spectra towards the NGC 7538, a star forming molecular cloud in the transition of J = 1 - 0 of $^{12}CO$. From the Outer Galaxy Survey database (Heyer et al., 1998) we obtained 504 spectra for the same region. We compared integrated intensities, line profiles of two databases, and found that they are consistent to each other. From the intensity ratio of these two databases we also found that the value of forward spillover scattering of the TRAO telescope system is 0.58.

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References

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