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Helical Magnetic Fields from Sphaleron Decay and Baryogenesis
Craig J. Copi, Francesc Ferrer, Tanmay Vachaspati +1
Many models of baryogenesis rely on anomalous particle physics processes to give baryon number violation. By numerically evolving the electroweak equations on a lattice, we show th…
Magnetic Fields in the Aftermath of Phase Transitions
Tanmay Vachaspati
The COSLAB effort has focussed on the formation of topological defects during phase transitions. Yet there is another potentially interesting signature of cosmological phase transi…
Cosmic Sparks from Superconducting Strings
Tanmay Vachaspati
We investigate cosmic sparks from cusps on superconducting cosmic strings in light of the recently discovered millisecond radio burst by Lorimer et al [1]. We find that the observe…
Black Stars and Gamma Ray Bursts
Tanmay Vachaspati
Stars that are collapsing toward forming a black hole but are frozen near the Schwarzschild horizon are termed "black stars". Collisions of black stars, in contrast to black hole c…
Light superconducting strings in the Galaxy
Francesc Ferrer, Tanmay Vachaspati
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…
511 KeV photons from superconducting cosmic strings
Francesc Ferrer, Tanmay Vachaspati
We show that a tangle of light superconducting strings in the Milky Way could be the source of the observed 511 KeV emission from electron-positron annihilation in the Galactic bul…