The host galaxy of the quasar SDSS J114816.64?525150.3 has an infrared luminosity of 2.2 × 1013times that of the Sun. In the extremely luminous 'local' galaxy Arp 220, the burst of star formation is concentrated in the relatively small central region of <100 pc radius. This study reports that the star-forming gas of the host galaxy of J114816.64525150.3 is distributed over a radius of about 750 pc around the centre. The surface density of the star formation rate averaged over this region is comparable to the peak in Arp 220, although about two orders of magnitude larger in area.
- Fabian Walter
- Dominik Riechers
- Roberto Maiolino