| Details: |
In this talk I shall show that studies of different types of celestial bodies can play important roles in understanding the microscopic natures of dark matter (DM).
If DM consists of weakly interacting massive particles (WIMPs), they can gravitationally accrete on the Sun over its age building a large population in its core.
Pair annihilations of such DM particles can give rise to neutrino flux which are searched at the terrestrial neutrino telescopes.
Constraints on WIMP DM from such neutrino telescope searches are complementary to those obtained from Direct Detection searches.
Based on this, one can put bounds on WIMP-nucleon interactions totally independent of the velocity distribution of DM particles in the halo.
I shall discuss this in the context of the non-relativistic effective theory of WIMP-nucleon scattering.
Additionally, I shall also discuss about some recent observation based indications of DM density spikes around the stellar-mass black holes of Galactic X-ray binaries.
If the existence of DM density spikes around such systems is true, then one can expect large enhancements in the photon signals produced from WIMP DM annihilation in these spikes.
Based on this fact, I shall show that the existing observations of such X-ray binaries can lead us to draw strong and robust constraints on the WIMP DM parameter space. |