11 citations · 20 across the 7 of their papers we have counts for
7 papers
Flat Circular Velocities on a megaparsec scale from the CDM model
Antonino Del Popolo, Man Ho Chan
A recent study using weak gravitational lensing reveals that there are some isolated galaxies having almost flat rotation curves at very large distance from the galactic centres. A…
On the time dependency of
Antonino Del Popolo, Man Ho Chan
In this paper, we test one of the predictions of the Scale Invariant Vacuum (SIV) theory on MOND. According to that theory, MOND's acceleration is not a universal quantity bu…
Improved Lemaitre-Tolman model and the mass and turn-around radius in group of galaxies II: the role of dark energy
A. Del Popolo, Man Ho Chan
In this paper, we extend our previous study \cite{DelPopolo2021} on the Lemaitre-Tolman (LT) model showing how the prediction of the model changes when the equation of state parame…
The effect of magnetic field on the inner Galactic rotation curve
Man Ho Chan, Antonino Del Popolo
In the past few decades, some studies pointed out that magnetic field might affect the rotation curves in galaxies. However, the impact is relatively small compared with the effect…
There is no universal acceleration scale in galaxies
Man Ho Chan, Shantanu Desai, Antonino Del Popolo
Recently, many studies seem to reveal the existence of some correlations between dark matter and baryonic matter. In particular, the unexpected tight Radial Acceleration Relation (…
Turnaround radius in CDM, and dark matter cosmologies II: the role of dynamical friction
Antonino Del Popolo, Man Ho Chan
This paper is an extension of the paper by Del Popolo, Chan, and Mota (2020) to take account the effect of dynamical friction. We show how dynamical friction changes the threshold…
Turnaround radius in CDM, and dark matter cosmologies with shear and vorticity
Antonino Del Popolo, Man Ho Chan, David F. Mota
We determine the relationship between the turnaround radius, , and mass, , in CDM, and in dark energy scenarios, using an extended spherical collapse model…