- #51
PAllen
Science Advisor
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Jambaugh,
The following:
https://www.physicsforums.com/showpost.php?p=3348591&postcount=2
posted by George Jones seems relevant here. I think the key concept is that the actual causal event horizon 'now' is affected by the total future of a black hole. Thus the actual boundary of which events are causally disconnected from distant observers is affected by any future growth of the black hole. It seems to me, then that the causal event horizon does grow in anticipation, if you will, as the merger approaches.
Also, there are lots of numeric solutions of black hole mergers showing GW seen by distant observers. So, in this sense, the merger must be observable.
The following:
https://www.physicsforums.com/showpost.php?p=3348591&postcount=2
posted by George Jones seems relevant here. I think the key concept is that the actual causal event horizon 'now' is affected by the total future of a black hole. Thus the actual boundary of which events are causally disconnected from distant observers is affected by any future growth of the black hole. It seems to me, then that the causal event horizon does grow in anticipation, if you will, as the merger approaches.
Also, there are lots of numeric solutions of black hole mergers showing GW seen by distant observers. So, in this sense, the merger must be observable.
