Fuzzballs and observations
Abstract
The advent of gravitational waves and black hole imaging has opened a new window into probing the horizon scale of black holes. An important question is whether string theory results for black holes can predict interesting and observable features that current and future experiments can probe. In this article I review the budding and exciting research being done on understanding the possibilities of observing signals from fuzzballs, where black holes are replaced by string-theoretic horizon-scale microstructure. In order to be accessible to both string theorists and black hole phenomenologists, I give a brief overview of the relevant observational experiments as well as the fuzzball paradigm in string theory and its explicitly constructable solutions called microstate geometries.
- Publication:
-
General Relativity and Gravitation
- Pub Date:
- December 2020
- DOI:
- 10.1007/s10714-020-02769-w
- arXiv:
- arXiv:2010.09736
- Bibcode:
- 2020GReGr..52..115M
- Keywords:
-
- String theory;
- Supergravity;
- Black holes;
- Fuzzballs;
- Microstate geometries;
- Black hole microstates;
- Gravitational waves;
- Gravitational wave observations;
- Black hole imaging;
- EHT;
- LISA;
- Gravitational multipoles;
- Tidal Love numbers;
- Echoes;
- Exotic compact objects;
- Multicentered geometries;
- Bubbled geometries;
- Superstrata;
- Quasinormal modes;
- Geodesics;
- Tidal effects;
- Black hole observations;
- High Energy Physics - Theory;
- Astrophysics - High Energy Astrophysical Phenomena;
- General Relativity and Quantum Cosmology;
- High Energy Physics - Phenomenology
- E-Print:
- 29 pages + references, 7 figures. Invited Review for GERG Topical Collection: The Fuzzball Paradigm. v2: minor changes and references added