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Testing MOND with Ultra-Compact Dwarf Galaxies
Riccardo Scarpa
The properties of the recently discovered Ultra-Compact Dwarf Galaxies (UCDs) show that their internal acceleration of gravity is everywhere above a0, the MOdified Newtonian Dynami…
Using globular clusters to test gravity in the weak acceleration regime: NGC 6171
Riccardo Scarpa, Gianni Marconi, Roberto Gilmozzi
As part of an ongoing program to test Newton's law of gravity in the low acceleration regime using globular clusters, we present here new results obtained for NGC 6171. Combining V…
MOND and the fundamental plane of elliptical galaxies
Riccardo Scarpa
It is shown that the MOdified Newtonian Dynamics (MOND) explains the tilt of the fundamental plane of elliptical galaxies without the need of non-baryonic dark matter. Results foun…
A Test of Newton's Law of Gravity in the Weak Acceleration Regime
Riccardo Scarpa, Gianni Marconi, Roberto Gilmozzi
A pilot experiment suitable to test Newton's law of gravity down to the regime of acceleration typical of galaxies has been carried out in Omega Centauri. Stars in the extreme peri…
On the Relation Between Radio and Non-Radio Elliptical Galaxies
Riccardo Scarpa, C. Megan Urry
Empirical evidence suggests that elliptical galaxies hosting a radio source may not be different from normal non-radio ellipticals. To test this possibility, we use Monte Carlo sim…
The optical properties of low redshift radio galaxies
F. Govoni, R. Falomo, G. Fasano +1
We present morphological and photometric properties of 79 low redshift (z<0.12) radio galaxies extracted from two radio flux limited samples of radio sources. All objects are image…