The New NANOGrav Long Frequency examples seem to show Equal Sized Dual Primordial Monster Herbig Haro BHs
Below: The Monster Dual BH Herbig Haro systems produces short living Monster Stars, creating one after an other, smaller Super Nova Black Holes , even observed in our own Galaxy. like Nebula star formation by small dual BHs.
Micro Herbig Haro dual Black Hole pairing systems for Star formation.
Look at both Micro Tailed Tadpole BHs self propelling and pairing.
see: Antonucci: as example for dual Herbig Haro starforming systems.
(Quasars and Radio Galaxies)
Figure 7. Keck images of three radio-loud FR II AGN, taken in the thermal IR at 11.7ยต. 3CR382 is a visible Broad Line Radio Galaxy. 3CR234 is known to be a hidden Quasar from its optical polarized flux spectrum. Apparently, 3CR28 does not hide a powerful Quasar since no infrared reradiation is detected. (Note that the apparent correlation of radio core strength with central engine type is not a general property.) From Whysong 2005.
JWST of the first Herbig Haro star formation?