Light superconducting strings in the Galaxy

Abstract

Observations of the Milky Way by the SPI/INTEGRAL satellite have confirmed the presence of a strong 511 KeV gamma-ray line emission from the bulge, which require an intense source of positrons in the galactic center. These observations are hard to account for by conventional astrophysical scenarios, whereas other proposals, such as light DM, face stringent constraints from the diffuse gamma-ray background. Here we suggest that light superconducting strings could be the source of the observed 511 KeV emission. The associated particle physics, at the ~ 1 TeV scale, is within reach of planned accelerator experiments, while the distinguishing spatial distribution, proportional to the galactic magnetic field, could be mapped by SPI or by future, more sensitive, satellite missions.

7 pages. Talk given by T. Vachaspati at the workshop 'From Quantum to Cosmos: Fundamental Physics Research in Space', Washington, D. C., May 2006

References in corpus (16)

• The all-sky distribution of 511 keV electron-positron annihilation emission
• Stringent Constraint on Galactic Positron Production
• Gamma-Ray Constraint on Galactic Positron Production by MeV Dark Matter
• Spectral analysis of the Galactic e+e- annihilation emission
• The sky distribution of positronium annihilation continuum emission measured with SPI/INTEGRAL
• Possible Evidence For Axino Dark Matter In The Galactic Bulge
• Continuum gamma-ray emission from light dark matter positrons and electrons
• 511 KeV Photons From Color Superconducting Dark Matter
• On the intensity and spatial morphology of the 511 keV emission in the Milky Way
• Microquasars as sources of positron annihilation radiation
• INTEGRAL/SPI Limits on Electron-Positron Annihilation Radiation from the Galactic Plane
• Gamma ray bursts and the origin of galactic positrons
• 511 keV line from Q balls in the Galactic Center
• 511 KeV photons from superconducting cosmic strings
• 511 keV line and diffuse gamma rays from moduli
• Zero modes on cosmic strings in an external magnetic field

Cited by in corpus (4)

• The 511 keV emission from positron annihilation in the Galaxy
• MeV Right-handed Neutrinos and Dark Matter
• The Morphology of Exciting Dark Matter and the Galactic 511 keV Signal
• Shock waves in superconducting cosmic strings: growth of current