Speaker
Description
Scalar field dark matter (SFDM) is an exciting and attractive alternative dark matter model which can successfully alleviate various issues plaguing traditional cold dark matter models. However, detecting SFDM is no easy task, as it may or may not interact with standard model particles
at all- making terrestrial experiments moot. On the other hand, dark matter distribution near the galactic center can be significantly increased due to central supermassive black hole producing local
overdensity or ’spikes’. Such overdensities affect gravitational wave emission from extreme mass ratio inspirals (EMRIs) around the SMBHs which can be used effectively to probe nature of dark matter. In this work, for the first time we derive the spike around galactic SMBH due to a galactic SFDM halo. We then used the generated spike profiles to quantify the effect of the SFDM spike on an EMRI system using GW observables. We show that not only spike generation drastically alters the detection prospect, GW can put strong constraints on the mass of SFDM.
| Other topic / keywords: | Scalar field dark matter, Fuzzy DM, EMRI, GW |
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