Search Publications

Low mass X-ray binaries in the Inner Galaxy: implications for millisecond pulsars and the GeV excess

Heinke, Craig; Linden, Tim; Haggard, Daryl +1 more

If millisecond pulsars (MSPs) are responsible for the excess gamma-ray emission observed from the region surrounding the Galactic Center, the same region should also contain a large population of low-mass X-ray binaries (LMXBs). In this study, we compile and utilize a sizable catalog of LMXBs observed in the the Milky Way's globular cluster system…

Sharp spectral features from light dark matter decay via gravity portals

Ibarra, Alejandro; Catà, Oscar; Ingenhütt, Sebastian

We investigate the phenomenology of dark matter decay assuming that it is induced by non-minimal coupling to gravity, when the dark matter mass is in the sub-GeV range, i.e. below the QCD confinement scale. We show that the decay of the singlet scalar dark matter candidate produces sharp features in the photon spectrum, in the form of lines, boxes…