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Figure 37: The surface brightness (a) and velocity dispersion (b) profiles of the elliptical galaxy
NGC 7507 [375] fitted by MOND (lines [399]). Elliptical galaxies can be approximated in MOND
as high-order polytropes with some radial orbit anisotropy [388]. This particular case has a
polytropic index of 14 with anisotropy of the Osipkov–Merritt form with an anisotropy radius of
5 kpc and maximum anisotropy |