39 citations · 88 across the 13 of their papers we have counts for
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Does the high-energy AMS-02 positron flux originate from the dark matter density spikes around nearby black holes?
Man Ho Chan, Chak Man Lee
Recent measurements made by the Alpha Magnetic Spectrometer (AMS) have detected accurate positron flux for energy range 1-1000 GeV. The energy spectrum can be best described by two…
Identifying dark matter signals by the radio continuum spectral data of the cool-core cluster RX J1720.1+2638
Man Ho Chan, Chak Man Lee
Investigating the signals of dark matter annihilation is one of the most popular ways to understand the nature of dark matter. In particular, many recent studies are focussing on u…
What if PSR J1910-5959A is an observable self-lensing binary?
Man Ho Chan, Chak Man Lee
In a binary, when the orbital plane of the companion star is almost edge-on along the line-of-sight direction, this would produce an observable self-gravitational lensing effect, w…
The evaporating primordial black hole fraction in cool-core galaxy clusters
Chak Man Lee, Man Ho Chan
Recent studies of gamma-ray, cosmic-ray and radio data put stringent constraints on the fraction of primordial black holes (PBHs) in our universe. In this article, we propose a new…
Constraining Primordial Black Hole Fraction at the Galactic Centre using radio observational data
Man Ho Chan, Chak Man Lee
Recent gamma-ray and cosmic-ray observations have put strong constraints on the amount of primordial black holes (PBHs) in our universe. In this article, we use the archival radio…
Constraining the population of intermediate mass black holes by gamma-ray data of the Fornax cluster
Man Ho Chan
Recent studies of merging black holes suggest that the cosmological mass fraction of primordial black holes (PBHs) is not completely negligible. The mass of a PBH can be as massive…
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…