Dark Coincidences: Small-Scale Solutions with Refracted Gravity and MOND

V Cesare - Universe, 2023 - mdpi.com
General relativity and its Newtonian weak field limit are not sufficient to explain the observed
phenomenology in the Universe, from the formation of large-scale structures to the dynamics …

On the presence of a universal acceleration scale in elliptical galaxies

KH Chae, M Bernardi, HD Sánchez… - The Astrophysical …, 2020 - iopscience.iop.org
Dark matter phenomena in rotationally supported galaxies exhibit a characteristic
acceleration scale of g†≈ 1.2× 10− 10 ms− 2. Whether this acceleration is a manifestation of …

The radial acceleration relation in galaxy clusters

MH Chan, A Del Popolo - Monthly Notices of the Royal …, 2020 - academic.oup.com
Recently, the discovery of the radial acceleration relation (RAR) in galaxies has been
regarded as an indirect support of alternative theories of gravity such as modified Newtonian …

Yet another test of Radial Acceleration Relation for galaxy clusters

S Pradyumna, S Gupta, S Seeram, S Desai - Physics of the Dark Universe, 2021 - Elsevier
We carry out a test of the radial acceleration relation (RAR) for galaxy clusters from two
different catalogs compiled in literature, as an independent cross-check of two recent …

Normalized additional velocity distribution: Testing the radial profile of dark matter halos and MOND

DC Rodrigues, A Hernandez-Arboleda… - Physics of the Dark …, 2023 - Elsevier
We propose a complementary and fast approach to study galaxy rotation curves directly from
the sample data, instead of individual fits. With this approach, some relevant tests can be …

Is there a fundamental acceleration scale in galaxies?

Z Chang, Y Zhou - Monthly Notices of the Royal Astronomical …, 2019 - academic.oup.com
Milgrom's modified Newtonian dynamics (MOND) can explain well the mass discrepancy
problem in galaxy without invoking dark matter. The MOND theory predicts a universal …

A test of Radial Acceleration Relation for the Giles et al Chandra cluster sample

S Pradyumna, S Desai - Physics of the Dark Universe, 2021 - Elsevier
We carry out a test of the radial acceleration relation (RAR) for a sample of 10 dynamically
relaxed and cool-core galaxy clusters imaged by the Chandra X-ray telescope, which was …

A fundamental test for MOND

V Marra, DC Rodrigues… - Monthly Notices of the …, 2020 - academic.oup.com
The radial acceleration relation (RAR) shows a strong correlation between two accelerations
associated with galaxy rotation curves. The relation between these accelerations is given by …

A cautionary tale in fitting galaxy rotation curves with Bayesian techniques-Does Newton's constant vary from galaxy to galaxy?

P Li, F Lelli, S McGaugh, J Schombert… - Astronomy & …, 2021 - aanda.org
The application of Bayesian techniques to astronomical data is generally non-trivial because
the fitting parameters can be strongly degenerated and the formal uncertainties are …

A test of constancy of dark matter halo surface density and radial acceleration relation in relaxed galaxy groups

K Gopika, S Desai - Physics of the Dark Universe, 2021 - Elsevier
The dark matter halo surface density, given by the product of the dark matter core radius (rc)
and core density (ρ c) has been shown to be a constant for a wide range of isolated galaxy …