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Strong limits on keV-scale galactic sterile neutrino dark matter with stray light from NuSTAR after 11 years of operation

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arxiv 2405.17861 v2 pith:UTVBAKHG submitted 2024-05-28 hep-ph astro-ph.HE

R.A. Krivonos , V.V. Barinov , A.A. Mukhin , D.S. Gorbunov This is my paper · ORCID
classification hep-phastro-ph.HE
keywords steriledarklimitsmatterneutrinosnustarlightoperation
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Using tremendous photon statistics gained with the stray light aperture of the NuSTAR telescope over 11 years of operation, we set strong limits on the emission of close to monochromatic photons from the radiative decays of putative dark matter sterile neutrinos in the Milky Way. In the energy range of 3-20 keV covered by the NuSTAR, the obtained limits reach the bottom edge of theoretical predictions of realistic models where sterile neutrinos are produced in the early Universe. Only a small region is left to explore, if the sterile neutrinos form the entire dark matter component.

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Cited by 3 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Opening up New Parameter Space for Sterile Neutrino Dark Matter

    hep-ph 2025-05 conditional novelty 8.0 of 10

    A new production channel, nu_a + nu_a -> nu_s + nu_s, mediated by a heavy scalar, can generate the observed sterile neutrino dark matter abundance independently of active-sterile mixing.

  2. Sterile Neutrino Dark Matter as a Probe of Inflationary Reheating

    hep-ph 2026-01 conditional novelty 5.0 of 10

    Inflaton decays during reheating can produce all of the observed sterile-neutrino dark matter with a branching ratio below 10^-4, evading X-ray bounds and making a future X-ray line a probe of the inflaton mass and re...

  3. Decays and annihilation of galactic dark matter: determine $D$-, $J_s$-, $J_p$- and $J_d$-factors with dark matter profiles inferred from GravSphere fit to stellar observations

    astro-ph.GA 2025-09 conditional novelty 4.0 of 10

    The authors compute D, Js, Jp and Jd factors for 20 dwarf spheroidals from GravSphere fits and give power-law scaling relations in distance, half-light radius, and velocity dispersion.

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