Statistics – Computation
Scientific paper
Jun 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990pasj...42..371f&link_type=abstract
Astronomical Society of Japan, Publications (ISSN 0004-6264), vol. 42, no. 3, 1990, p. 371-385.
Statistics
Computation
2
Fission, Galactic Bulge, Gravitational Effects, Molecular Gases, Rotating Matter, Astronomical Models, Computational Astrophysics, Computerized Simulation, Contraction, Elongation
Scientific paper
A uniform gaseous ellipsoid was applied as a model for a massive gas cloud rotating at the galactic center of a deep gravitational potential. It was found that an initially circular gas cloud elongates and then rotates end-over-end when its contraction proceeds and the gas density becomes more than twenty times as large as the background matter density. The elongated gas cloud would then be divided into two parts, separated on diametrically opposite sides of the center. Numerical simulations were made to confirm the fission, suggesting that the two symmetric peaks observed in the (C-12)O (J = 1-0) gas cloud on the galactic center (IC 342, NGC 6946 and Maffei 2) are the result of the elongation and subsequent fission of a massive (10 to the 7th to 10 to the 8th solar masses) high-density (100 to 1000 H2/cu cm) gas cloud accreted onto the galactic center.
Fujimoto Mitsuaki
Miyama Shoken M.
Tatematsu Yoshinori
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