NGC 1068 constraints on neutrino-dark matter scattering

Cosmological constraints on Neutrino - Dark Matter interactions

I summarize the results of a recent analysis where the cosmological effects of interactions of neutrinos with cold Dark Matter (DM) is investigated. This interaction produces diffusion-damped oscillations in the matter power spectrum, analogous to the acoustic oscillations in the baryon-photon fluid. I discuss the bounds from the Sloan Digital Sky Survey on the corresponding opacity defined as ...

Coherent neutrino scattering in dark matter detectors

Direct X-ray Constraints on Sterile Neutrino Warm Dark Matter

Warm dark matter (WDM) might more easily account for small scale clustering measurements than the heavier particles typically invoked in Λ cold dark matter (ΛCDM) cosmologies. In this paper, we consider a ΛWDM cosmology in which sterile neutrinos νs, 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 An...

Neutrino constraints on the dark matter total annihilation cross section

Hasan Yüksel, Shunsaku Horiuchi, John F. Beacom, and Shin’ichiro Ando Department of Physics, Ohio State University, Columbus, Ohio 43210, USA Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, Ohio 43210, USA Department of Physics, School of Science, University of Tokyo, Tokyo 113-0033, Japan Department of Astronomy, Ohio State University, Columbus, Ohio 43210, US...

Cosmological constraints on neutrino plus axion hot dark matter

We use observations of the cosmological large-scale structure to derive limits on two-component hot dark matter consisting of mass-degenerate neutrinos and hadronic axions, both components having velocity dispersions corresponding to their respective decoupling temperatures. We restrict the data samples to the safely linear regime, in particular excluding the Lyman-α forest. Using standard Baye...