Work

Soldering freedom and Bondi-Metzner-Sachs-like transformations

Year: 2018

Type: article

Abstract: When two spacetimes are stitched across a null shell placed at the horizon of a black hole, Bondi-Metzner-Sachs (BMS) supertranslation-like soldering freedom arises if one demands the induced metric on the shell should remain invariant under the translations generated by the null generators of the shell. We revisit this phenomenon on the horizon of rotating shells and obtain BMS-like symmetries. We further show that superrotation-like soldering symmetries in the form of conformal isometries can emerge whenever the degenerate metric of any null hypersurface admits a dependency on a null (degenerate direction) coordinate. This kind of conformal isometry can also appear for a null surface situated very close to the horizon of black holes. We also study the intrinsic properties of different kinds of horizon shells considered in this article.

Source: Physical review. D/Physical review. D.

DOI: 10.1103/physrevd.98.104009

Authors: Srijit Bhattacharjee, Arpan Bhattacharyya

Institutions: Indian Institute of Information Technology Allahabad, Kyoto University, Fudan University, Yukawa Institute for Theoretical Physics

Language: English

Topic: Black Holes and Theoretical Physics

Subfield: Nuclear and High Energy Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: hybrid

Funders: University of Bern, Fudan University, Science and Engineering Research Board

Award: G2778814598