Search for dark matter in compact hydrogen clouds
arXiv:1304.2478 · doi:10.1093/mnrasl/slt042
Abstract
The recently published GALFA-HI Compact Cloud Catalogue lists 20 neutral hydrogen clouds that might pinpoint previously undiscovered high-latitude dwarf galaxies. Detection of an associated gamma-ray dark matter signal could provide a route to distinguish unambiguously between truly dark matter dominated systems that have accumulated neutral hydrogen but have not successfully ignited star formation and pure gaseous structures devoid of dark matter. We use 4.3 years of Fermi observations to derive gamma-ray flux upper limits in the 1-300 GeV energy range for the sample. Limits on gamma rays from pair annihilation of dark matter are also presented depending on the yet unknown astrophysical factors.
5 pages, 2 figures, 1 table, accepted for publication in MNRAS
References in corpus (16)
- Dark Matter Candidates from Particle Physics and Methods of Detection
- Cats and Dogs, Hair and A Hero: A Quintet of New Milky Way Companions
- A common mass scale for satellite galaxies of the Milky Way
- Dark matter and cosmic structure
- Gamma Ray Signals from Dark Matter: Concepts, Status and Prospects
- Dark Matter and Fundamental Physics with the Cherenkov Telescope Array
- The Local Group dwarf Leo T: HI on the brink of star formation
- Fermi's Sibyl: Mining the gamma-ray sky for dark matter subhaloes
- Indirect Dark Matter Detection Limits from the Ultra-Faint Milky Way Satellite Segue 1
- Dark matter line search using a joint analysis of dwarf galaxies with the Fermi Gamma-ray Space Telescope
- The GALFA-HI Compact Cloud Catalog
- Dark matter in the classical dwarf spheroidal galaxies: a robust constraint on the astrophysical factor for gamma-ray flux calculations
- Late Gas accretion onto Primordial Minihalos: a Model for Leo T, Dark Galaxies and Extragalactic High-Velocity Clouds
- HI Clouds in the Lower Halo: I. The Galactic All-Sky Survey Pilot Region
- Can proper motions of dark-matter subhalos be detected?
- Do High-Velocity Clouds trace the Dark Matter subhalo population?