Constraints on the Decomposition of the Rotation Curves of Spiral Galaxies

Details Constraints on the Decomposition of the Rotation Curves of Spiral Galaxies Constraints on the Decomposition of the Rotation Curves of Spiral Galaxies

2002-12-20

arxiv.org/abs/astro-ph/0212485v1

Astronomy and Astrophysics

Astrophysics

Latex, 6 pages, 4 figures, contributed talk at the IDM2002 conference, Sept. 2 - 6 2002, in York, England

Scientific paper

I discuss anew how arguments about the internal dynamics of galactic disks set constraints on the otherwise ambiguous decomposition of the rotation curves of spiral galaxies into the contributions by the various constituents of the galaxies. Analyzing the two sample galaxies NGC 3198 and NGC 2985 I conclude from the multiplicities of the spiral arms and the values of the Q disk stability parameters that the disks of both galaxies are `maximum disks'.

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