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NGC 3741 is a gas-dominated spiral galaxy. It is an irregular galaxy in the constellation Ursa Major and was discovered by John Herschel in 1828. NFDG results for NGC 3741 are shown below: the top panel shows the variable dimension D as a function of the radial distance R, computed with NFDG models. This dimension is very close to values in the range D=1.4-1.6, over most of the radial range. Bottom panel: NFDG galactic rotation curves compared with SPARC data. There is almost perfect agreement between the main NFDG (SPARC) curve (red-solid) and the experimental data. This shows that, if this galaxy behaves as a fractal structure whose dimension D follows the red-solid curve in the top panel, the resulting NFDG circular velocity curve in the bottom panel (red-solid) will perfectly fit the experimental data, without any need of dark matter.

A gas-dominated galaxy such as NGC 3741, might be characterized by a fractional dimension smaller than the D=2 value that we observed for a disk-dominated galaxy, such as NGC 6503. See my third paper (published version) for a full discussion of this galaxy.

NFDG analysis of NGC 3741. Top panel: variable space dimension D as a function of the radial distance R. Bottom panel: NFDG rotation curves (circular velocity vs. radial distance) compared to the original SPARC data.