Direct X-ray Constraints on Sterile Neutrino Warm Dark Matter

@article{Watson2006DirectXC,
  title={Direct X-ray Constraints on Sterile Neutrino Warm Dark Matter},
  author={Casey R. Watson and John F. Beacom and Hasan Yuksel and Terry P. Walker},
  journal={Physical Review D},
  year={2006},
  volume={74},
  pages={033009}
}
Warm dark matter (WDM) might more easily account for small scale clustering measurements than the heavier particles typically invoked incold dark matter (�CDM) cosmologies. In this paper, we consider aWDM cosmology in which sterile neutrinoss, with a mass ms of roughly 1-100 keV, are the dark matter. We use the diffuse X-ray spectrum (total minus resolved point source emission) of the Andromeda galaxy to constrain the rate of sterile neutrino radiative decay: �s → �e,µ,� + . Our findings demand… 

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References

SHOWING 1-10 OF 99 REFERENCES
Direct Detection of Warm Dark Matter in the X-Ray
We point out a serendipitous link between warm dark matter (WDM) models for structure formation on the one hand and the high-sensitivity energy range (1-10 keV) for X-ray photon detection on the
Linear Cosmological Structure Limits on Warm Dark Matter
I consider constraints from observations on a cutoff scale in clustering due to free streaming of the dark matter in a warm dark matter cosmological model with a cosmological constant. The limits are
Constraints on sterile neutrinos as dark matter candidates from the diffuse X-ray background
Sterile neutrinos with masses in the keV range are viable candidates for the warm dark matter. We analyze existing data for the extragalactic diffuse X-ray background for signatures of sterile
Constraints on Warm Dark Matter from Cosmological Reionization
We study the constraints that high-redshift structure formation in the universe places on warm dark matter (WDM) dominated cosmological models. We modify the extended Press-Schechter formalism to
Sterile Neutrino Hot, Warm, and Cold Dark Matter
Author(s): Abazajian, K; Fuller, GM; Patel, M | Abstract: We calculate the incoherent resonant and non-resonant scattering production of sterile neutrinos in the early universe. We find ranges of
Relic keV sterile neutrinos and reionization.
TLDR
It is shown that x rays produced by the decays of these relic sterile neutrinos can boost the production of molecular hydrogen, which can speed up the cooling of gas and the early star formation, and lead to a reionization of the Universe at a high enough redshift to be consistent with the Wilkinson Microwave Anisotropy Probe results.
Impact of dark matter decays and annihilations on reionization
One of the possible methods to distinguish among various dark matter (DM) candidates is to study the effects of DM decays. We consider four different DM candidates [light dark matter (LDM),
Cosmological lepton asymmetry, primordial nucleosynthesis and sterile neutrinos
We study post weak decoupling coherent active-sterile and active-active matter-enhanced neutrino flavor transformation in the early Universe. We show that flavor conversion efficiency at
Sterile neutrinos as dark matter.
TLDR
This model is reexamine and it is found that hot, warm, and cold dark matter are all possibilities and the number density of sterile neutrinos is proportional to [mu][sup 2]/M so that the energy density today is independent of M, which is crucial in determining the large scale structure of the Universe.
...
...