Signatures of Compact Halos of Sterile-Neutrino Dark Matter

Abstract

We investigate compact halos of sterile-neutrino dark matter and examine observable signatures with respect to neutrino and photon emission. Primarily, we consider two cases: primordial black-hole halos and ultra-compact mini-halos. In both cases, we find that there exists a broad range of possible parameter choices such that detection in the near future with X-ray and gamma-ray telescopes might be well possible. In fact, for energies above $10\mathrm{TeV}$, the neutrino telescope IceCube would be a splendid detection machine for such macroscopic dark-matter candidates.

6 pages, 2 figures, 2 tables; v2: minor modifications to match published version

References in corpus (11)

• Primordial Black Holes as Dark Matter
• The Dawn of FIMP Dark Matter: A Review of Models and Constraints
• Effect of Primordial Black Holes on the Cosmic Microwave Background and Cosmological Parameter Estimates
• All-sky search for time-integrated neutrino emission from astrophysical sources with 7 years of IceCube data
• Microlensing and dynamical constraints on primordial black hole dark matter with an extended mass function
• Testing scenarios of primordial black holes being the seeds of supermassive black holes by ultracompact minihalos and CMB $\mu$-distortions
• Primordial black holes from inflaton and spectator field perturbations in a matter-dominated era
• Small-scale clumps of dark matter
• An X-ray Spectroscopic Search for Dark Matter in the Perseus Cluster with Suzaku
• Calibration and performance studies of the balloon-borne hard X-ray polarimeter PoGO+
• Shedding new light on the Crab with polarized X-rays

Cited by in corpus (2)

• Primordial Black Holes as Dark Matter: Recent Developments
• Hawking Radiation Signatures from Primordial Black Holes Transiting the Inner Solar System: Prospects for Detection