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Measuring the smearing of the Galactic 511 keV signal: positron propagation or supernova kicks?
Thomas Siegert, Roland M. Crocker, Oscar Macias +4
We use 15 years of -ray data from INTEGRAL/SPI in a refined investigation of the morphology of the Galactic bulge positron annihilation signal. Our spatial analysis confirms tha…
Dark matter constraints with stacked gamma rays scales with the number of galaxies
Daiki Hashimoto, Atsushi J. Nishizawa, Masahiro Takada +1
Low-surface-brightness galaxies (LSBGs) are interesting targets for searches of dark matter emission due to their low baryonic content. However, predicting their expected dark matt…
Millisecond Pulsars from Accretion Induced Collapse as the Origin of the Galactic Centre Gamma-ray Excess Signal
Anuj Gautam, Roland M. Crocker, Lilia Ferrario +4
Gamma-ray data from the Fermi-Large Area Telescope reveal an unexplained, apparently diffuse, signal from the Galactic bulge that peaks near 2 GeV with an approximately spherical i…
Cherenkov Telescope Array sensitivity to the putative millisecond pulsar population responsible for the Galactic center excess
Oscar Macias, Harm van Leijen, Deheng Song +3
The leading explanation of the Galactic center -ray excess is the extended emission from a unresolved population of millisecond pulsars (MSPs) in the Galactic b…
Evidence for a high-energy tail in the gamma-ray spectra of globular clusters
Deheng Song, Oscar Macias, Shunsaku Horiuchi +2
Millisecond pulsars are very likely the main source of gamma-ray emission from globular clusters. However, the relative contributions of two separate emission processes--curvature…