Figure 13. Four galaxies with 8-shaped double ring pattern; Top row is the original images, a: NGC 7098, b: UGC12646, c: NGC 2665, d: SDSS J015701.50-001644.4. Lower row is the simulations for each original image above. e: NGC 7098, Euler (25,65,25); f: UGC12646, Euler (8,59,0); g: NGC2665, Euler (35,35,0); h: SDSS J015701.50-001644.4, Euler (-22,-55,45)

From

Spirals and Rings in Barred Galaxies by the ROTASE Model

Hongjun Pan

International Journal of Physics. 2021, 9(6), 286-307 doi:10.12691/ijp-9-6-5