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Galaxies 2018, 6(1), 22; doi:10.3390/galaxies6010022

Galactic Structures from Gravitational Radii

1
Dipartimento di Fisica “E. Pancini”, Università di Napoli “Federico II”, Complesso di Monte Sant’Angelo, Edificio G, Via Cinthia, I-80126 Napoli, Italy
2
Istituto Nazionale di Fisica Nucleare (INFN) Sezione di Napoli, Complesso di Monte Sant’Angelo, Edificio G, Via Cinthia, I-80126 Napoli, Italy
3
Gran Sasso Science Institute, Viale F. Crispi, 7, I-67100 L’Aquila, Italy
4
Atomic Physics Laboratory (040), Vinča Institute of Nuclear Sciences, University of Belgrade, P.O. Box 522, 11001 Belgrade, Serbia
5
Astronomical Observatory, Volgina 7, P.O. Box 74, 11060 Belgrade, Serbia
These authors contributed equally to this work.
*
Author to whom correspondence should be addressed.
Received: 5 December 2017 / Revised: 29 December 2017 / Accepted: 2 January 2018 / Published: 7 February 2018
(This article belongs to the Special Issue Cosmology and the Quantum Vacuum)
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Abstract

We demonstrate that the existence of a Noether symmetry in f ( R ) theories of gravity gives rise to an additional gravitational radius, besides the standard Schwarzschild one, determining the dynamics at galactic scales. By this feature, it is possible to explain the baryonic Tully-Fisher relation and the rotation curve of gas-rich galaxies without the dark matter hypothesis. Furthermore, under the same standard, the Fundamental Plane of elliptical galaxies can be addressed. View Full-Text
Keywords: modified theories of gravity; methods: analytical; methods: numerical; galaxies; galaxies: fundamental parameters modified theories of gravity; methods: analytical; methods: numerical; galaxies; galaxies: fundamental parameters
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Capozziello, S.; Borka, D.; Borka Jovanović, V.; Jovanović, P. Galactic Structures from Gravitational Radii. Galaxies 2018, 6, 22.

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