A Double Helix in Outer Space
Scientists at Max Planck Institute for Radioastronomie discover a double helical
structure inside an extragalactic jet, providing direct evidence for the presence of Kelvin--Helmholtz instability in the
relativistic plasma of the jet. Abstract One of the most intriguing features observed in the active galactic nuclei (AGN)
are relativistic plasma outflows (jets) that originate in the immediate vicinity of the center of activity and propagate at
distances that are sometimes more than a hundred times larger than the size of the host galax