July 29, 2019 to August 2, 2019
Northeastern University
US/Eastern timezone

Strong constraints on keV-scale sterile neutrinos with NuSTAR

Jul 30, 2019, 2:34 PM
West Village G 102 (Northeastern University)

West Village G 102

Northeastern University

Oral Presentation Dark Matter Dark Matter


Mr Brandon Roach (Massachusetts Institute of Technology)


A keV-scale sterile neutrino is a popular candidate for dark matter, with a decay signature of a mono-energetic photon that can be probed using X-ray telescopes. The NuSTAR X-ray observatory's wide-angle aperture for unfocused X-rays has allowed it to set world-leading limits on the decay rate of sterile neutrinos with masses 10-50 keV. I will present our constraints on the flux of new X-ray lines using 1.2 Ms of NuSTAR archival observations of the M31 galaxy, which reduce the remaining parameter space for resonantly-produced sterile neutrinos by close to one-third. I will also present our preliminary limits using ${\sim}200$ ks of dedicated high-latitude NuSTAR observations near the Galactic Center.

Primary authors

Dr Kenny Chun Yu Ng (Weizmann Institute of Science) Mr Brandon Roach (Massachusetts Institute of Technology) Prof. Kerstin Perez (MIT) Prof. John Beacom (Ohio State University) Prof. Shunsaku Horiuchi (Virginia Tech) Dr Roman Krivonos (Space Research Institute (IKI)) Prof. Daniel Wik (University of Utah)

Presentation materials