2026-06-29T15:25:53Zhttps://docta.ucm.es/rest/oai/requestoai:docta.ucm.es:20.500.14352/993982024-11-06T15:19:31Zcom_20.500.14352_14col_20.500.14352_15
Docta Complutense
author
Monjo Agut, Robert
2024-02-06T11:26:18Z
2024-02-06T11:26:18Z
2023
Monjo R 2023 Galaxy rotation curve in hyperconical universes: a natural relativistic MOND Class. Quantum Grav. 40 235002
10.1088/1361-6382/ad0422
https://hdl.handle.net/20.500.14352/99398
https//doi.org/10.1088/1361-6382/ad0422
Modified Newtonian dynamics (MOND) and similar proposals can (at least partially) explain the excess rotation of galaxies or the equivalent mass-discrepancy acceleration, without (or by reducing) the requirement of dark matter halos. This paper develops a modified gravity model to obtain local limit to the general relativity (GR) compatible with a cosmological metric different to the standard Friedmann–Lemaître–Robertson–Walker metric. Specifically, the paper uses a distorted stereographic projection of hyperconical universes, which are 4D hypersurfaces embedded into 5D Minkowski spacetime. This embedding is a key in the MOND effects found in galactic scales. To adequately describe the mass-discrepancy acceleration relation, centrifugal force would present a small time-like contribution at large-scale dynamics due to curvature of the Universe. Therefore, the Lagrangian density is very similar to the GR but with subtracting the background curvature (or vacuum energy density) of the perturbed hyperconical metric. Results showed that the proposed model adjusts well to 123 galaxy rotation curves obtained from the Spitzer Photometry and Accurate Rotation Curves database, using only a free parameter.
eng
Galaxy rotation curve in hyperconical universes: a natural relativistic MOND
journal article
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URL
https://docta.ucm.es/bitstreams/b585e03a-835b-4a76-8fd0-8e7ede0ead7a/download
File
MD5
e862ea1ec365e774e677c02180a48f2d
853630
application/pdf
monjo_galaxy.pdf