Positive Spin-induced Quadrupole Moment in String Theory
High Energy Physics - Theory
2025-10-08 v1 General Relativity and Quantum Cosmology
Abstract
We identify singularity-free Running-Kerr-Taub-Bolt solutions of eleven-dimensional supergravity that descend to four-dimensional rotating solutions with flat-space asymptotics. We compute their spin-induced quadrupole moment and find that for a certain range of charges this quadrupole moment is positive. This behavior differs from the Kerr black hole and from most other spinning objects constructed with ``normal'' four-dimensional matter, and we discuss the top-down physics of these solutions that could be responsible for this unusual behavior.
Keywords
Cite
@article{arxiv.2510.05217,
title = {Positive Spin-induced Quadrupole Moment in String Theory},
author = {Iosif Bena and Angèle Lochet},
journal= {arXiv preprint arXiv:2510.05217},
year = {2025}
}