46 citations · 186 across the 26 of their papers we have counts for
9 papers · 1 filter
The first robust evidence showing a dark matter density spike around the supermassive black hole in OJ 287
Man Ho Chan, Chak Man Lee
Black hole dynamics suggests that dark matter would re-distribute near a supermassive black hole to form a density spike. However, no direct evidence of dark matter density spike a…
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 strong falsification of the universal radial acceleration relation in galaxies
Man Ho Chan
In the past few decades, many studies revealed that there exist some apparent universal relations which can describe the dynamical properties in galaxies. In particular, the radial…
A severe challenge to the MOND phenomenology in our Galaxy
Man Ho Chan, Ka Chung Law
Modified Newtonian Dynamics (MOND) is one of the most popular alternative theories of dark matter to explain the missing mass problem in galaxies. Although it remains controversial…
Two mysterious universal dark matter-baryon relations in galaxies and galaxy clusters
Man Ho Chan
Starting from the 1970s, some relations connecting dark matter and baryons were discovered, such as the Tully-Fisher relation. However, many of the relations found in galaxies are…
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…