2016/11/17 by Kyle Lawson, Ariel Zhitnitsky
Physics and Astronomy · #Annihilation #Astronomy #Astrophysics #Astrophysics and Cosmic Phenomena #Baryonic dark matter #Cosmology #Dark Matter and Cosmic Phenomena #Dark energy #Dark galaxy #Dark matter #Dark matter halo #Dwarf galaxy #Dwarf galaxy problem #Galaxy #Hot dark matter #Interacting galaxy #Light dark matter #Line (geometry) #Particle physics #Physics #Pulsars and Gravitational Waves Research #Scalar field dark matter #Warm dark matter #astro-ph.CO #hep-ph
paper · pdf · doi:10.1088/1475-7516/2017/02/049
10 pages, two figures
arxiv created 2016/11/17 · openalex publication_date 2017/02/28 · arxiv updated 2017/03/08 · openalex created_date 2020/11/23 · openalex updated_date 2026/08/05
The observed galactic 511 keV line has been interpreted in a number of papers as a possible signal of dark matter annihilation within the galactic bulge. If this is the case then it is possible that a similar spectral feature may be observed in association with nearby dwarf galaxies. These objects are believed to be strongly dark matter dominated and present a relatively clean observational target. Recently INTEGRAL observations have provided new constraints on the 511 keV flux from nearby dwarf galaxies [1] motivating further investigation into the mechanism by which this radiation may arise. In the model presented here dark matter in the form of heavy quark nuggets produces the galactic 511 keV emission line through interactions with the visible matter. It is argued that this type of interaction is not strongly constrained by the flux limits reported in [2].