Journal
CLASSICAL AND QUANTUM GRAVITY
Volume 25, Issue 19, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/0264-9381/25/19/195025
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We consider an approach to the hyperboloidal evolution problem based on the Einstein equations written for a rescaled metric. It is shown that a conformal scale factor can be freely prescribed a priori in terms of coordinates in a well-posed hyperboloidal initial value problem such that the location of null infinity is independent of the time coordinate. With an appropriate choice of a single gauge source function each of the formally singular conformal source terms in the equations attains a regular limit at null infinity. The suggested approach could be beneficial in numerical relativity for both wave extraction and outer boundary treatment.
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