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Constraining the origin of the rising cosmic ray positron fraction with the boron-to-carbon ratio
Ilias Cholis, Dan Hooper
The rapid rise in the cosmic ray positron fraction above 10 GeV, as measured by PAMELA and AMS, suggests the existence of nearby primary sources of high energy positrons, such as p…
Constraints on dark matter annihilations from diffuse gamma-ray emission in the Galaxy
Maryam Tavakoli, Ilias Cholis, Carmelo Evoli +1
Recent advances in gamma-ray cosmic ray, infrared and radio astronomy have allowed us to develop a significantly better understanding of the galactic medium properties in the last…
New limits on dark matter annihilation from AMS cosmic ray positron data
Lars Bergstrom, Torsten Bringmann, Ilias Cholis +2
The AMS experiment onboard the International Space Station has recently provided cosmic ray electron and positron data with unprecedented precision in the range from 0.5 to 350 GeV…
Pulsars Cannot Account for the Inner Galaxy's GeV Excess
Dan Hooper, Ilias Cholis, Tim Linden +2
Using data from the Fermi Gamma-Ray Space Telescope, a spatially extended component of gamma rays has been identified from the direction of the Galactic Center, peaking at energies…
Dark Matter and Pulsar Origins of the Rising Cosmic Ray Positron Fraction in Light of New Data From AMS
Ilias Cholis, Dan Hooper
The rise of the cosmic ray positron fraction with energy, as first observed with high confidence by PAMELA, implies that a large flux of high energy positrons has been recently (or…
The 111 and 129 GeV gamma-ray lines from annihilations in the Milky Way dark matter halo, dark disk and subhalos
Ilias Cholis, Hani Nurbiantoro Santosa, Maryam Tavakoli +1
Recently a series of indications have been put forward suggesting the presence of two gamma-ray lines at 110-130 GeV (centered at 111 and 129 GeV). Signals of these lines have been…