38 citations · 145 across the 16 of their papers we have counts for
17 papers
Constraining annihilating dark matter using the multi-frequency radio flux profiles of the M33 galaxy
Man Ho Chan, Chak Man Lee, Lang Cui +2
Radio data can give stringent constraints for annihilating dark matter. In general, radio observations can detect very accurate radio flux density with high resolution and differen…
A Brief Introduction to the Adomian Decomposition Method, with Applications in Astronomy and Astrophysics
Man Kwong Mak, Chun Sing Leung, Tiberiu Harko
The Adomian Decomposition Method (ADM) is a very effective approach for solving broad classes of nonlinear partial and ordinary differential equations, with important applications…
Analysing the radio flux density profile of the M31 galaxy: a possible dark matter interpretation
Man Ho Chan, Chu Fai Yeung, Lang Cui +1
Some recent studies have examined the gamma-ray flux profile of our Galaxy to determine the signal of dark matter annihilation. However, the results are controversial and no confir…
The effects of the dark energy on the static Schrödinger-Newton system -- an Adomian Decomposition Method and Padé approximants based approach
Man Kwong Mak, Chun Sing Leung, Tiberiu Harko
The Schrödinger-Newton system is a nonlinear system obtained by coupling together the linear Schrödinger equation of quantum mechanics with the Poisson equation of Newtonian mechan…
Constraining annihilating dark matter mass by the radio continuum spectral data of a high-redshift galaxy cluster
Man Ho Chan, Chak Man Lee, C. -Y. Ng +1
In the past decade, the properties of annihilating dark matter models were examined by various kinds of data, including the data of gamma rays, radio waves, X-ray, positrons, elect…
Vortex solutions in atomic Bose-Einstein condensates via the Adomian Decomposition Method
Tiberiu Harko, Man Kwong Mak, Chun Sing Leung
We study the dynamics of vortices with arbitrary topological charges in weakly interacting Bose-Einstein condensates using the Adomian Decomposition Method to solve the nonlinear G…
Ruling out GeV thermal relic annihilating dark matter by radio observation of the Andromeda galaxy
Man Ho Chan, Lang Cui, Jun Liu +1
In the past few years, some studies claimed that annihilating dark matter with mass GeV can explain the GeV gamma-ray excess in our Galaxy. However, recent analyses o…
Solving the nonlinear biharmonic equation by the Laplace-Adomian and Adomian Decomposition Methods
Man Kwong Mak, Chun Sing Leung, Tiberiu Harko
The biharmonic equation, as well as its nonlinear and inhomogeneous generalizations, plays an important role in engineering and physics. In particular the focusing biharmonic nonli…
Constraining dark matter by the 511 keV line
Man Ho Chan, Chung Hei Leung
In the past few decades, observations indicated that an unexplained high production rate of positrons (the strong 511 keV line) exists in the Milky Way center. By using the fact th…
Computation of the general relativistic perihelion precession and of light deflection via the Laplace-Adomian Decomposition Method
Man Kwong Mak, Chun Sing Leung, Tiberiu Harko
We study the equations of motion of the massive and massless particles in the Schwarzschild geometry of general relativity by using the Laplace-Adomian Decomposition Method, which…
Slowly rotating Bose Einstein Condensate galactic dark matter halos, and their rotation curves
Xiaoyue Zhang, Man Ho Chan, Tiberiu Harko +2
If dark matter is composed of massive bosons, a Bose-Einstein Condensation process must have occurred during the cosmological evolution. Therefore galactic dark matter may be in a…
Ruling out dark matter interpretation of the galactic GeV excess by gamma-ray data of galaxy clusters
Man Ho Chan, Chung Hei Leung
Recently, some very tight constraints of annihilating dark matter have been obtained from gamma-ray data of the Milky Way and Milky Way dwarf spheroidal satellite galaxies. In this…
Jacobi stability analysis of the Lorenz system
Tiberiu Harko, Chor Yin Ho, Chun Sing Leung +1
We perform the study of the stability of the Lorenz system by using the Jacobi stability analysis, or the Kosambi-Cartan-Chern (KCC) theory. The Lorenz model plays an important rol…
Generalized Langevin equation with colored noise description of the stochastic oscillations of accretion disks
Tiberiu Harko, Chun Sing Leung, Gabriela Mocanu
We consider a description of the stochastic oscillations of the general relativistic accretion disks around compact astrophysical objects interacting with their external medium bas…
Generalized Langevin equation description of the stochastic oscillations of general relativistic disks
Chun Sing Leung, Gabriela Mocanu, Tiberiu Harko
We consider a description of the stochastic oscillations of the general relativistic accretion disks around compact astrophysical objects based on the generalized Langevin equation…
Fractal dimension and thermodynamic fluctuation properties of IDV light curves
C. S. Leung, J. Y. Wei, A. K. H. Kong +2
Fractals are a basic tool to phenomenologically describe natural objects having a high degree of temporal or spatial variability. From a physical point of view the fractal properti…
Modeling the IDV emissions of the BL Lac Objects with a Langevin type stochastic differential equation
C. S. Leung, J. Y. Wei, T. Harko +1
In this paper, we introduce a simplified model for explaining the observations of the optical intraday variability (IDV) of the BL Lac Objects. We assume that the source of the IDV…