The Bulletin of The Korean Astronomical Society (천문학회보)

The Korean Astronomical Society (한국천문학회)
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Physical Properties of Molecular Clouds in NGC 6822 Hubble V

  • Lee, Hye-In (School of Space Research and Institute of Natural Sciences, Kyung Hee University) ;
  • Pak, Soojong (School of Space Research and Institute of Natural Sciences, Kyung Hee University) ;
  • Oh, Heeyoung (Korea Astronomy and Space Science Institute) ;
  • Le, Huynh Anh N. (Department of Astronomy, University of Science and Technology of China) ;
  • Lee, Sungho (Korea Astronomy and Space Science Institute) ;
  • Lim, Beomdu (School of Space Research and Institute of Natural Sciences, Kyung Hee University) ;
  • Tatematsu, Ken'ichi (National Astronomical Observatory of Japan) ;
  • Park, Sangwook (Physics Department, University of Texas at Arlington) ;
  • Mace, Gregory (Department of Astronomy, the University of Texas at Austin) ;
  • Jaffe, Daniel T. (Department of Astronomy, the University of Texas at Austin)
  • Published : 2019.04.10
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Abstract

NGC 6822 is a dwarf irregular galaxy whose metal abundance is lower than of the Large Magellanic Cloud. Hubble V is the brightest HII complex where molecular clouds surround the core cluster of OB stars. Because of its proximity (d = 500 kpc), we can resolve the star-forming regions on parsec scales (1 arcsec = 2.4 pc). Using the high-resolution (R = 45,000) near-infrared spectrograph, IGRINS, we observed molecular hydrogen emission lines from photo-dissociation regions (PDRs) and $Br{\gamma}$ emission line from ionized regions. In this presentation, we compare our data PDR models in order to derive the density distribution of the molecular clouds on parsec scales and to estimate the total mass of the clouds.

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