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Discovery of a New Galactic Center Excess Consistent with Upscattered Starlight
Kevork N. Abazajian, Nicolas Canac, Shunsaku Horiuchi +2
We present a new extended gamma ray excess detected with the Fermi Satellite Large Area Telescope toward the Galactic Center that traces the morphology of infrared starlight emissi…
Running with BICEP2: Implications for Small-Scale Problems in CDM
Shea Garrison-Kimmel, Shunsaku Horiuchi, Kevork N. Abazajian +2
The BICEP2 results, when interpreted as a gravitational wave signal and combined with other CMB data, suggest a roll-off in power towards small scales in the primordial matter powe…
The Sensitivity of HAWC to High-Mass Dark Matter Annihilations
A. U. Abeysekara, R. Alfaro, C. Alvarez +101
The High Altitude Water Cherenkov (HAWC) observatory is a wide field-of-view detector sensitive to gamma rays of 100 GeV to a few hundred TeV. Located in central Mexico at 19 degre…
Resonantly-Produced 7 keV Sterile Neutrino Dark Matter Models and the Properties of Milky Way Satellites
Kevork N. Abazajian
Sterile neutrinos produced through a resonant Shi-Fuller mechanism are arguably the simplest model for a dark matter interpretation origin of the recent unidentified X-ray line see…
The Knotted Sky II: Does BICEP2 require a nontrivial primordial power spectrum?
Kevork N. Abazajian, Grigor Aslanyan, Richard Easther +1
An inflationary gravitational wave background consistent with BICEP2 is difficult to reconcile with a simple power-law spectrum of primordial scalar perturbations. Tensor modes con…
The Knotted Sky I: Planck constraints on the primordial power spectrum
Grigor Aslanyan, Layne C. Price, Kevork N. Abazajian +1
Using the temperature data from Planck we search for departures from a power-law primordial power spectrum, employing Bayesian model-selection and posterior probabilities. We param…