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Originally Posted by trinitree88
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Originally Posted by parejkoj
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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parejkoj. Doppler broadening of iron emission lines has been seen,here: http://www.spacedaily.com/reports/Ne..._Time_999.html |
Although an interesting set of observations (related papers
here and
here), that is not gravitational redshift from the gravity at the surface of the neutron star, but rather line broadening due to the inner structure of the accretion disk. The second paper claims that they are able to put lower limits on the gravitational redshift given certain assumptions, but that is all.
So, again, what relevance does this have to objects with z >> 0.01? Particularly since those redshifts are from measurements that would not apply in the case of strong gravitational fields?
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Originally Posted by trinitree88
That anything can be ejected from a galaxy, AGN, pulsar, etc...still seems lost to lots of folks out there. pete
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Ummm... What? AGN and pulsars eject gas all the time, supernova remnants are known to gain large kicks from the explosion, black hole mergers can gain large kicks from asymmetric gravitational radiation... But none of these have anything to do with Arp's ideas...