New Rotating Black Holes in String Theory

TL;DR

This paper introduces new rotating black hole solutions in string theory with unique thermodynamic and symmetry properties, including higher-dimensional generalizations and charged variants, derived via large-d limits of Myers-Perry black holes.

Contribution

It presents novel rotating black hole solutions in string theory, including higher-dimensional and charged cases, and explores their thermodynamics and symmetries, expanding the landscape of known solutions.

Findings

Solutions are asymptotically flat and exhibit a linear dilaton vacuum.

Temperature is independent of black hole mass, similar to the Witten black hole.

Large-d limit of Myers-Perry black holes helps derive and interpret these solutions.

Abstract

We present new black hole solutions to the low-energy effective action of string theory. We introduce three- and four-dimensional solutions that are rotating, asymptotically flat, and exhibit a linear dilaton vacuum. We also introduce higher-dimensional generalisations of these black holes that possess multi angular momentum-like charges. These solutions cannot be overspun, i.e., do not have an extremality condition, akin to some higher-dimensional Myers-Perry black holes. Studying their thermodynamics reveals that the temperature associated to these solutions does not depend on the black hole mass, similar to the Witten black hole. We also find that their asymptotic symmetry group is more stringent than the BMS group. We consider the charged generalisations for these black holes, which introduces closed timelike curves within the inner horizon. We show that these black holes can be derived from the large-$d$ limit of the Myers-Perry black hole. As such we advocate that large-$d$ can provide a useful vantage point to interpret the here introduced black holes, as well as more generally a way to generate new effective field theories and corresponding non-trivial solutions.