Speaker
Pranjal Ralegankar
(SISSA)
Description
Primordial magnetic fields (PMFs) can enhance baryon perturbations on scales on small scales. However, a magnetically driven baryon fluid becomes turbulent near recombination, thereby damping out baryon perturbations below the magnetic jeans scale. In this talk, I show that the initial growth in baryon perturbations gravitationally induces growth in the dark matter perturbations, which are unaffected by turbulence and eventually collapse to form $10^{−11}-10^3$ $M_{\odot}$ dark matter minihalos. If the magnetic fields purportedly detected in the blazar observations are PMFs generated by phase transitions, then such PMFs could potentially produce detectable dark matter minihalos.
Primary author
Pranjal Ralegankar
(SISSA)
