천문학회보 (The Bulletin of The Korean Astronomical Society)
- 제36권2호
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- Pages.56.1-56.1
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- 2011
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- 1226-2692(pISSN)
Gas Inflow from the Central Few Hundred Parsec to the Few Parsec Regions
- Lee, An-Sun (School of Space Research, Kyung Hee University) ;
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Kim, Sung-Soo S.
(School of Space Research, Kyung Hee University)
- 발행 : 2011.10.05
초록
We investigate the hydrodynamics of gas clouds in the central few hundred parsecs of the Galaxy. Non-axisymmetry (elongation) of the Galactic bulge can form a reservoir of dense molecular clouds at around two hundred parsecs from the center through the X1-X2 orbit transfer, and the star formation that has been sustained for the lifetime of the galaxy can build up a nuclear bulge there. If the nuclear bulge is elongated, this again can transport the gas there down to the central few parsecs region. We perform a series of 3-D hydrodynamic simulations that consider a potential for this "nested bar", cooling/heating, star formation and supernova feedback, and estimate the efficiency of the gas inflow down to the central parsec region.
키워드