18 citations · 59 across the 20 of their papers we have counts for
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Transformation of mass-angular momentum aspect under BMS transformations
Po-Ning Chen, Mu-Tao Wang, Ye-Kai Wang +1
In this article, we present the definitive transformation formulae of the mass aspect and angular momentum aspect under BMS transformations. Two different approaches that lead to t…
Cross-Section Continuity of Definitions of Angular Momentum
Po-Ning Chen, Daniel Paraizo, Robert M. Wald +3
We introduce a notion of "cross-section continuity" as a criterion for the viability of definitions of angular momentum, , at null infinity: If a sequence of cross-sections, ${\…
Conserved quantities in general relativity -- the view from null infinity
Po-Ning Chen, Mu-Tao Wang, Ye-Kai Wang +1
In general relativity, an idealized distant observer is situated at future null infinity where light rays emitted from the source approach. This article concerns conserved quantiti…
Supertranslation invariance of angular momentum at null infinity in double null gauge
Po-Ning Chen, Mu-Tao Wang, Ye-Kai Wang +1
The supertranslation invariance of the Chen-Wang-Yau (CWY) angular momentum in the Bondi-Sachs formalism/gauge was ascertained by the authors in \cite{CKWWY_evol, CWWY_atmp}. In th…
BMS charges without supertranslation ambiguity
Po-Ning Chen, Mu-Tao Wang, Ye-Kai Wang +1
The asymptotic symmetry of an isolated gravitating system, or the Bondi-Metzner-Sachs (BMS) group, contains an infinite-dimensional subgroup of supertranslations. Despite decades o…
Evolution of angular momentum and center of mass at null infinity
Po-Ning Chen, Jordan Keller, Mu-Tao Wang +2
We study how conserved quantities such as angular momentum and center of mass evolve with respect to the retarded time at null infinity, which is described in terms of a Bondi-Sach…
Supertranslation invariance of angular momentum
Po-Ning Chen, Mu-Tao Wang, Ye-Kai Wang +1
LIGO's successful detection of gravitational waves has revitalized the theoretical understanding of the angular momentum carried away by gravitational radiation. An infinite dimens…
Quasi-local mass on unit spheres at spatial infinity
Po-Ning Chen, Mu-Tao Wang, Ye-Kai Wang +1
In this note, we compute the limit of the Wang-Yau quasi-local mass on unit spheres at spatial infinity of an asymptotically flat initial data set. Similar to the small sphere limi…
Quasi-local mass at null infinity in Bondi-Sachs coordinates
Po-Ning Chen, Mu-Tao Wang, Ye-Kai Wang +1
There are two important statements regarding the Trautman-Bondi mass at null infinity: one is the positivity, and the other is the Bondi mass loss formula, which are both global in…
Quasi-local mass at axially symmetric null infinity
Po-Ning Chen, Mu-Tao Wang, Ye-Kai Wang +1
We give a brief review of the definition of the Wang-Yau quasilocal mass and discuss the evaluation of which on surfaces of unit size at null infinity of an axi-symmetric spacetime…