천문학회보 (The Bulletin of The Korean Astronomical Society)
- 제39권2호
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- Pages.81.1-81.1
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- 2014
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- 1226-2692(pISSN)
PDR Model : Test and fit observed data Obtained by Herschel PACS
- Yun, Hyeong-Sik (Department of Astronomy and Space Science, Kyung Hee University) ;
- Lee, Jeong-Eun (Department of Astronomy and Space Science, Kyung Hee University) ;
- Lee, Seokho (Department of Astronomy and Space Science, Kyung Hee University)
- 발행 : 2014.10.13
초록
We utilized a 2-D PDR code developed by Lee et al. (2014) to explore the observed OH line fluxes toward embedded protostars. This 2-D PDR code combines self-consistently the FUV radiative transfer, gas-energetics, chemistry, and line radiative transfer. We modeled two sources, GSS30-IRS1 and Elias29, which show conspicuous line emission in the Herschel/PACS wavelength range. The physical and chemical structure for a given embedded source was derived by fitting the PACS CO line fluxes. After exploring various parameter spaces, we conclude that IR-pumping effect either by the central IR source and dust in-situ is insignificant for OH emission, unlike previous studies. We here present a possible solution for the observed OH fluxes, which require a high OH abundance and temperature at the inner-part of the UV heated cavity wall.
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