A novel notion of null infinity for c-boundaries and generalized black holes
Sign Up to like & getrecommendations! Published in 2018 at "Journal of High Energy Physics"
DOI: 10.1007/jhep09(2018)123
Abstract: A bstractWe give new definitions of null infinity and black hole in terms of causal boundaries, applicable to any strongly causal spacetime (M, g). These are meant to extend the standard ones given in terms… read more here.
Keywords: notion null; null infinity; novel notion; black hole ... See more keywords
Null infinity, the BMS group and infrared issues
Sign Up to like & getrecommendations! Published in 2018 at "General Relativity and Gravitation"
DOI: 10.1007/s10714-018-2464-3
Abstract: There has been a recent resurgence of interest in the structure of the gravitational field at null infinity, sparked by new results on soft charges and infrared issues related to the S matrix theory in… read more here.
Keywords: infrared issues; group infrared; null infinity; infinity bms ... See more keywords
Supertranslations: redundancies of horizon data, and global symmetries at null infinity
Sign Up to like & getrecommendations! Published in 2018 at "Classical and Quantum Gravity"
DOI: 10.1088/1361-6382/aa9669
Abstract: We characterise the geometrical nature of smooth supertranslations defined on a generic non-expanding horizon (NEH) embedded in vacuum. To this end we consider the constraints imposed by the vacuum Einstein's equations on the NEH structure,… read more here.
Keywords: null infinity; supertranslations redundancies; horizon data; geometry ... See more keywords
Linking Past and Future Null Infinity in Three Dimensions
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DOI: 10.1103/physrevd.95.086011
Abstract: We provide a mapping between past null and future null infinity in three-dimensional flat space, using symmetry considerations. From this we derive a mapping between the corresponding asymptotic symmetry groups. By studying the metric at… read more here.
Keywords: future null; infinity three; null infinity;
Aretakis Charges and Asymptotic Null Infinity
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DOI: 10.1103/physrevd.96.084055
Abstract: We construct a relation between the Aretakis charge of any extreme black hole and the Newman-Penrose charge. This is achieved by constructing a conformal correspondence between extreme black holes and what we call weakly asymptotically… read more here.
Keywords: charges asymptotic; null infinity; extreme black; charge ... See more keywords
Horizon Hair of Extremal Black Holes and Measurements at Null Infinity.
Sign Up to like & getrecommendations! Published in 2018 at "Physical review letters"
DOI: 10.1103/physrevlett.121.131102
Abstract: It is shown that the conserved charges on the event horizon and the Cauchy horizon associated with scalar perturbations on extremal black holes are externally measurable from null infinity. This suggests that these charges have… read more here.
Keywords: horizon hair; extremal black; black holes; null infinity ... See more keywords