Bulletin of the Korean Space Science Society (한국우주과학회:학술대회논문집(한국우주과학회보))

The Korean Space Science Society (한국우주과학회)
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MASS DISTRIBUTION IN THE CENTRAL FEW PARSECS OF THE MILKY WAY

  • Oh Seungkyung (Dept. of Astronomy and Space Science, Kyung Hee University) ;
  • Kim Sungsoo S. (Dept. of Astronomy and Space Science, Kyung Hee University) ;
  • Figer Donald F. (Space Telescope Science Institute) ;
  • Morris Mark (Dept. of physics and Astronomy, Division of Astronomy, University of California)
  • Published : 2004.10.01
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Abstract

Near-IR observations of the central few parsecs of our Galaxy from the HST/NICMOS have been analyzed to produce H, K photometry. We have cross-identified our photometry with the Keck high-resolution spectrometry of the central 0.5 pc of our galaxy to distinguish evolved late-type stars from early-type stars, and use late-type stars as tracer population. We perform several statistical tests to find the best fitting parameters of stellar density distribution and velocity dispersion models, then derive volume number densities and velocity dispersions. The volume number density distribution has power law index $1.55\~1.7$. We then derive the mass distribution in the Central region of our Galaxy using the Jeans equation.

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