Einstein cluster as central spiky distribution of galactic dark matter
Using the Einstein cluster models, we construct a fully relativistic, spherically symmetric, spiky structure of matter distribution near a supermassive black hole. We introduce and discuss three simple toy models, together with a more realistic model, which includes a Hernquist-type distribution with a typical galaxy scale. We find that the innermost stable circular orbit (ISCO) depends on the details of the environment and lies between the photon radius (at $3{M}_{\mathrm{BH}}$) and the ISCO radius of an isolated black hole of mass ${M}_{\mathrm{BH}}$ (at $6{M}_{\mathrm{BH}}$).
Authors
- Anzhong Wang (ORCID: https://orcid.org/0000-0002-8852-9966)
- Vítor Cardoso (ORCID: https://orcid.org/0000-0003-0553-0433)
- Kei‐ichi Maeda (ORCID: https://orcid.org/0000-0003-0520-1576)
Institutions
- University of Lisbon (PT)
- Waseda University (JP)
- Baylor University (US)
- Kyoto University (JP)
Publication Details
- Journal
- Physical review. D/Physical review. D.
- Published
- 2025-02-20
- DOI
- https://doi.org/10.1103/physrevd.111.044060
- Citations
- 9
- Primary Topic
- Dark Matter and Cosmic Phenomena
- Type
- article
- Field-Weighted Citation Impact
- 16.83
Funders
- National Science Foundation
- Villum Fonden
- European Commission
- National Research Foundation
- Danmarks Grundforskningsfond
- Zhejiang University
- Zhejiang University of Technology
- Yukawa Institute for Theoretical Physics, Kyoto University
- Horizon 2020 Framework Programme
- Japan Society for the Promotion of Science
- H2020 European Research Council
- HORIZON EUROPE Marie Sklodowska-Curie Actions