7 papers
New 511 keV line data provides strongest sub-GeV dark matter constraints
Pedro De la Torre Luque, Shyam Balaji, Joseph Silk
We explore the ~keV emission associated to sub-GeV dark matter (DM) particles that can produce electron-positron pairs and form positronium after thermalizing. We use …
Signals of Bursts from the Very Early Universe
Leo Stodolsky, J. Silk
We consider possible observable signals from explosive events in the very early universe, ``bursts". These could be expected in connection with massive black hole or ``baby univers…
511 keV Galactic Photons from a Dark Matter Spike
Pedro De la Torre Luque, Shyam Balaji, Malcolm Fairbairn +2
We propose that a dark matter (DM) spike around the Galactic Center's (GC) supermassive black hole, Sgr A*, could account for most of the bulge's measured 511 keV line intensity wh…
Fermi-LAT Galactic Center Excess morphology of dark matter in simulations of the Milky Way galaxy
Moorits Mihkel Muru, Joseph Silk, Noam I. Libeskind +2
The strongest experimental evidence for dark matter is the Galactic Center gamma-ray excess observed by the Fermi telescope and even predicted prior to discovery as a potential dar…
Multi-messenger detection of black hole binaries in dark matter spikes
Fani Dosopoulou, Joseph Silk
We investigate the inspiral of a high mass-ratio black hole binary located in the nucleus of a galaxy, where the primary central black hole is surrounded by a dense dark matter spi…
Positron Signal from the Early Universe
L. Stodolsky, J. Silk
Bursts from the very early universe may lead to a detectable signal via the production of positrons, whose annihilation gives an observable X-ray signal. Using the absorption param…