Constraining black holes with light boson hair and boson stars using epicyclic frequencies and quasiperiodic oscillations
Light bosonic fields are ubiquitous in extensions of the Standard Model. Even when minimally coupled to gravity, these fields might evade the assumptions of the black-hole no-hair theorems and give rise to spinning black holes which can be drastically different from the Kerr metric. Furthermore, the...
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| Format: | Article |
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American Physical Society
2017
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| Online Access: | https://eprints.nottingham.ac.uk/45554/ |
| _version_ | 1848797153459175424 |
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| author | Franchini, Nicola Pani, Paolo Maselli, Andrea Gualtieri, Leonardo Herdeiro, Carlos A.R. Radu, Eugen Ferrari, Valeria |
| author_facet | Franchini, Nicola Pani, Paolo Maselli, Andrea Gualtieri, Leonardo Herdeiro, Carlos A.R. Radu, Eugen Ferrari, Valeria |
| author_sort | Franchini, Nicola |
| building | Nottingham Research Data Repository |
| collection | Online Access |
| description | Light bosonic fields are ubiquitous in extensions of the Standard Model. Even when minimally coupled to gravity, these fields might evade the assumptions of the black-hole no-hair theorems and give rise to spinning black holes which can be drastically different from the Kerr metric. Furthermore, they allow for self-gravitating compact solitons, known as (scalar or Proca) boson stars. The quasiperiodic oscillations (QPOs) observed in the x-ray flux emitted by accreting compact objects carry information about the strong-field region, thus providing a powerful tool to constrain deviations from Kerr’s geometry and to search for exotic compact objects. By using the relativistic precession model as a proxy to interpret the QPOs in terms of geodesic frequencies, we investigate how the QPO frequencies could be used to test the no-hair theorem and the existence of light bosonic fields near accreting compact objects. We show that a detection of two QPO triplets with current sensitivity can already constrain these models and that the future eXTP mission or a LOFT-like mission can set very stringent constraints on black holes with bosonic hair and on (scalar or Proca) boson stars. The peculiar geodesic structure of compact scalar/Proca boson stars implies that these objects can easily be ruled out as alternative models for x-ray source GRO J1655-40. |
| first_indexed | 2025-11-14T19:59:21Z |
| format | Article |
| id | nottingham-45554 |
| institution | University of Nottingham Malaysia Campus |
| institution_category | Local University |
| last_indexed | 2025-11-14T19:59:21Z |
| publishDate | 2017 |
| publisher | American Physical Society |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | nottingham-455542020-05-04T18:50:23Z https://eprints.nottingham.ac.uk/45554/ Constraining black holes with light boson hair and boson stars using epicyclic frequencies and quasiperiodic oscillations Franchini, Nicola Pani, Paolo Maselli, Andrea Gualtieri, Leonardo Herdeiro, Carlos A.R. Radu, Eugen Ferrari, Valeria Light bosonic fields are ubiquitous in extensions of the Standard Model. Even when minimally coupled to gravity, these fields might evade the assumptions of the black-hole no-hair theorems and give rise to spinning black holes which can be drastically different from the Kerr metric. Furthermore, they allow for self-gravitating compact solitons, known as (scalar or Proca) boson stars. The quasiperiodic oscillations (QPOs) observed in the x-ray flux emitted by accreting compact objects carry information about the strong-field region, thus providing a powerful tool to constrain deviations from Kerr’s geometry and to search for exotic compact objects. By using the relativistic precession model as a proxy to interpret the QPOs in terms of geodesic frequencies, we investigate how the QPO frequencies could be used to test the no-hair theorem and the existence of light bosonic fields near accreting compact objects. We show that a detection of two QPO triplets with current sensitivity can already constrain these models and that the future eXTP mission or a LOFT-like mission can set very stringent constraints on black holes with bosonic hair and on (scalar or Proca) boson stars. The peculiar geodesic structure of compact scalar/Proca boson stars implies that these objects can easily be ruled out as alternative models for x-ray source GRO J1655-40. American Physical Society 2017-06-14 Article PeerReviewed Franchini, Nicola, Pani, Paolo, Maselli, Andrea, Gualtieri, Leonardo, Herdeiro, Carlos A.R., Radu, Eugen and Ferrari, Valeria (2017) Constraining black holes with light boson hair and boson stars using epicyclic frequencies and quasiperiodic oscillations. Physical Review D, 95 . 124025/1-124025/16. ISSN 2470-0029 https://journals.aps.org/prd/abstract/10.1103/PhysRevD.95.124025 doi:10.1103/PhysRevD.95.124025 doi:10.1103/PhysRevD.95.124025 |
| spellingShingle | Franchini, Nicola Pani, Paolo Maselli, Andrea Gualtieri, Leonardo Herdeiro, Carlos A.R. Radu, Eugen Ferrari, Valeria Constraining black holes with light boson hair and boson stars using epicyclic frequencies and quasiperiodic oscillations |
| title | Constraining black holes with light boson hair and boson stars using epicyclic frequencies and quasiperiodic oscillations |
| title_full | Constraining black holes with light boson hair and boson stars using epicyclic frequencies and quasiperiodic oscillations |
| title_fullStr | Constraining black holes with light boson hair and boson stars using epicyclic frequencies and quasiperiodic oscillations |
| title_full_unstemmed | Constraining black holes with light boson hair and boson stars using epicyclic frequencies and quasiperiodic oscillations |
| title_short | Constraining black holes with light boson hair and boson stars using epicyclic frequencies and quasiperiodic oscillations |
| title_sort | constraining black holes with light boson hair and boson stars using epicyclic frequencies and quasiperiodic oscillations |
| url | https://eprints.nottingham.ac.uk/45554/ https://eprints.nottingham.ac.uk/45554/ https://eprints.nottingham.ac.uk/45554/ |