The Surroundings of Disturbed, Active Galaxies
  The brightest apparent magnitude examples of ultra luminous infrared galaxies (ULIRG's) are studied here in X-ray, optical, infrared and radio wavelengths. It is is found that they have associated material reaching out to apparent diameters of the order of a degree on the sky.   Gas, dust, X-ray material and quasars appear to be ejected from the active nuclei with all objects nearer than their redshift distances. 
Halton Arp