Pith. sign in

REVIEW 2 cited by

Enhanced Ehlers Transformation and the Majumdar-Papapetrou-NUT Spacetime

Not yet reviewed by Pith; the record is open.

Re-run · record.json Download PDF Read on arXiv ↗

This paper has not been read by Pith yet. Machine review is queued; the pith claim, tier, and objections will appear here once it completes.

SPECIMEN: schema-true, not a live event

T0 review · schema-true

One-sentence machine reading of the paper's core claim.

pith:XXXXXXXX · record.json · timestamp

arxiv 1906.08228 v3 pith:DUTKOQAB submitted 2019-06-19 gr-qc hep-th

Marco Astorino This is my paper · ORCID
classification gr-qchep-th
keywords chargetransformationblackehlersenhancedholedualityelectromagnetic
verification ladder T0 review T1 audit T2 compute T3 formal
0 comments
read the original abstract

The transformation which adds (or removes) NUT charge when it is applied to electrovacuum, axisymmetric and stationary space-times is studied. After analysing the Ehlers and the Reina-Treves transformations we propose a new one, more precise in the presence of the Maxwell electromagnetic field. The enhanced Ehlers transformation proposed turns out to act as a gravitomagnetic duality, analogously to the electromagnetic duality, but for gravity: it rotates the mass charge into the gravomagnetic (or NUT) charge. As an example the Kerr-Newman-NUT black hole is obtained with the help of this enhanced transformation. Moreover a new analytical exact solution is built adding the NUT charge to a double charged black hole, at equilibrium. It describes the non-extremal generalisation of the Majumdar-Papapetrou-NUT solution. From the near-horizon analysis, its microscopic entropy, according to the Kerr/CFT correspondence, is found and the second law of black hole thermodynamics is discussed.

Discussion (0). Continue with ORCID to comment.

Forward citations

Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Kerr--NUT--Levi-Civita geometries from Ernst inversion: axis structure, curvature singularities, and the Manko--Ruiz parameter

    gr-qc 2026-07 accept novelty 6.0 of 10

    Ernst inversion of Kerr–NUT yields a new vacuum metric family whose axis regularity, curvature singularities, and horizon data are governed by the Manko–Ruiz parameter C and the pre-inversion twist β.

  2. A class of charged-Taub-NUT-scalar metrics via Harison and Ehlers Transformations

    gr-qc 2025-01 reject novelty 4.0 of 10

    A proposed new family of charged Taub-NUT spacetimes with a theta-dependent scalar field, built via Harrison and Ehlers transformations, but the exact-solution claim is unsupported and internally inconsistent.

Pith tools