And what does a velocity kick of ~1000 km/s (which have been observed for neutron stars) or ~600 km/s (for "ordinary" high velocity stars in the SDSS SEGUE) have to do with redshifts >> 0.01? There is no solid measurement for the gravitational redshift on neutron stars either: not a lot of emission-lines to be found on that surface! So I'm not sure how this is relevant to either the OP, or to Arp's ideas.

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