The necessity of dark matter in MOND within galactic scales

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dc.creatorFerreras, Ignacio
dc.creatorSakellariadou, Mairi
dc.creatorYusaf, Muhammad Furqaan
dc.date2007-09-20
dc.date2007-12-05
dc.date.accessioned2026-07-07T11:19:26Z
dc.date.available2026-07-07T11:19:26Z
dc.descriptionTo further test MOdified Newtonian Dynamics (MOND) on galactic scales -- originally proposed to explain the rotation curves of disk galaxies without dark matter -- we study a sample of six strong gravitational lensing early-type galaxies from the CASTLES database. To determine whether dark matter is present in these galaxies, we compare the total mass (from lensing) with the stellar mass content (from a comparison of photometry and stellar population synthesis). We find that strong gravitational lensing on galactic scales requires a significant amount of dark matter, even within MOND. On such scales a 2 eV neutrino cannot explain this excess matter -- in contrast with recent claims to explain the lensing data of the bullet cluster. The presence of dark matter is detected in regions with a higher acceleration than the characteristic MONDian scale of $\sim 10^{-10}$m/s$^2$. This is a serious challenge to MOND unless the proper treatment of lensing is qualitatively different (possibly to be developed within a consistent theory such as TeVeS).
dc.description5 pages, 3 figures, 1 table Amended version to match publication in Phys. Rev. lett
dc.identifierhttps://arxiv.org/abs/0709.3189
dc.identifierhttp://arxiv.org/abs/0709.3189
dc.identifierPhys.Rev.Lett.100:031302,2008
dc.identifierdoi:10.1103/PhysRevLett.100.031302
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/193684
dc.subjectAstrophysics
dc.subjectGeneral Relativity and Quantum Cosmology
dc.subjectHigh Energy Physics - Phenomenology
dc.subjectHigh Energy Physics - Theory
dc.titleThe necessity of dark matter in MOND within galactic scales
dc.typetext

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