Radio bounds on the mixed dark matter scenarios of primordial black holes and WIMPs

We study the synchrotron radio emission in mixed dark matter scenarios consisting of primordial black holes (PBHs) and self-annihilating WIMPs (weakly interacting massive particles). The can form ultracompact minihalos around PBHs annihilation enhancement from these dense halos lead to efficient radiation at frequency presence galactic magnetic fields. upper bound PBH fraction with respect total abundance is order $10^{-8}\sim 10^{-5}$ depending on electroweak scale WIMP mass ($m_{\chi}=10\sim 1000$ GeV) channel (e.g. a hadronic $\chi \chi \rightarrow b \bar{b}$ or leptonic e^+ e^-$ channel). contribution hence negligible when other component composed conventional WIMPs.