{
  "id": "1901.07025",
  "version": "v1",
  "published": "2019-01-21T18:31:16.000Z",
  "updated": "2019-01-21T18:31:16.000Z",
  "title": "Inverse-Compton emission from Millisecond Pulsars in the Galactic bulge",
  "authors": [
    "Deheng Song",
    "Oscar Macias",
    "Shunsaku Horiuchi"
  ],
  "comment": "13 pages, 8 figures, 3 tables, submitted to PRD",
  "categories": [
    "astro-ph.HE",
    "astro-ph.GA",
    "hep-ph"
  ],
  "abstract": "Analyses of $\\textit{Fermi Gamma-Ray Space Telescope}$ data have revealed a source of excess diffuse gamma rays towards the Galactic center that extends up to roughly $\\pm 20$ degrees in latitude. The leading theory postulates that this GeV excess is the aggregate emission from a large number of faint millisecond pulsars (MSPs). The electrons and positrons ($e^{\\pm}$) injected by this population could produce detectable inverse-Compton (IC) emissions by up-scattering ambient photons to gamma-ray energies. In this work, we calculate such IC emissions using $\\texttt{GALPROP}$. A triaxial 3D model of the bulge stars obtained from a fit to infrared data is used as a tracer of the putative MSP population. This model is compared against one in which the MSPs are spatially distributed as a Navarro-Frenk-White squared profile. We show that the resulting spectra for both models are indistinguishable, but that their spatial morphologies have salient recognizable features. The IC component above $\\sim $ TeV energies carry information on the spatial morphology of the injected $e^\\pm$. Such differences could potentially be used by future high-energy gamma-ray detectors such as Cherenkov Telescope Array (CTA) to provide a viable multiwavelength handle for the MSP origin of the GeV excess.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2019-01-21T18:31:16.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "galactic bulge",
      "inverse-compton emission",
      "spatial morphology",
      "excess diffuse gamma rays",
      "tev energies carry information"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 13,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}