On the distribution of matter within disk galaxies with finite thickness

Details On the distribution of matter within disk galaxies with finite thickness On the distribution of matter within disk galaxies with finite thickness

Dec 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978acasn..19..182p&link_type=abstract

Acta Astronomica Sinica, vol. 19, Dec. 1978, p. 182-187. In Chinese, with abstract in English.

Astronomy and Astrophysics

Astronomy

11

Astronomical Models, Disks (Shapes), Galactic Structure, Milky Way Galaxy, Space Density, Density Distribution, Galactic Nuclei, Stellar Motions, Symmetry

Scientific paper

Neglecting peculiar motion of stars, the relation between projected surface density and rotation curve of axisymmetrical galaxies, in which the distribution of matter along the z-axis is assumed to vary as exp -alpha/z/, is investigated. Modified formulae of Toomre's model for highly flattened galaxies are obtained. It is shown that on considering the thickness of galaxies, the distribution of matter will concentrate more to the center of galaxies than Toomre's model. For central part of the Galaxy, the projected surface density has increases about 9% more than that given by Toomre's model.

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