Light superconducting strings in the Galaxy

Details Light superconducting strings in the Galaxy Light superconducting strings in the Galaxy

2006-08-08

arxiv.org/abs/astro-ph/0608168v1

Int.J.Mod.Phys.D16:2399-2405,2008

Astronomy and Astrophysics

Astrophysics

7 pages. Talk given by T. Vachaspati at the workshop 'From Quantum to Cosmos: Fundamental Physics Research in Space', Washingt

Scientific paper

10.1142/S0218271807011802

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.

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