ALMA resolves the stellar birth explosion in distant quasar 3C298
  Galaxies are believed to experience star formation and black hole driven
nuclear activity symbiotically. The symbiosis may be more extreme in the
distant universe, as far-infrared photometry with the Herschel Space
Observatory has found many cases of ultra-luminous cool dust emission in z>1
radio galaxies and quasars, which could have its origin in the central black
hole activity, or in extreme starbursts. We here present strong evidence for an
extreme circumnuclear starburst in the z=1.439 quasar 3C298. Our unparalleled
0.18 arcsecond resolution ALMA image at rest-frame 410micrometer wavelength
shows that the ~40K dust in its host galaxy resides in an asymmetric
circumnuclear structure. The morphology of this structure implies a starburst
origin and a symbiotic physical relation with the AGN driven radio source. The
symbiosis is likely to be a general property of distant massive galaxies.
