Probing Modified Gravity Theories with Scalar Fields Using Black-Hole Images
Abstract
:1. Introduction
2. Shadow Radius of Compact Objects
2.1. Black Holes
2.2. Wormholes
3. The EHT Bounds
4. The Einstein-Scalar-GB Theory
4.1. Black Holes
4.1.1.
4.1.2.
4.1.3.
4.2. Wormholes
5. Curvature-Induced Spontaneous Scalarization
5.1. Minimal Model
5.2. Quartic sGB Coupling
6. The Einstein–Maxwell-Scalar Theory
7. Conclusions
Author Contributions
Funding
Data Availability Statement
Conflicts of Interest
Appendix A. Equations in EsRGB Theory
Appendix B. Equations in EMS Theory
1 |
References
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Sgr Estimates | ||||
---|---|---|---|---|
Deviation | 1- Bounds | 2- Bounds | ||
eht-img | VLTI | |||
Keck | ||||
SMILI | VLTI | |||
Keck | ||||
DIFMAP | VLTI | |||
Keck | ||||
mG-ring | VLTI | |||
Keck | ||||
M Estimates | |||
---|---|---|---|
Deviation | 1- Bounds | 2- Bounds | |
EHT |
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Antoniou, G.; Papageorgiou, A.; Kanti, P. Probing Modified Gravity Theories with Scalar Fields Using Black-Hole Images. Universe 2023, 9, 147. https://doi.org/10.3390/universe9030147
Antoniou G, Papageorgiou A, Kanti P. Probing Modified Gravity Theories with Scalar Fields Using Black-Hole Images. Universe. 2023; 9(3):147. https://doi.org/10.3390/universe9030147
Chicago/Turabian StyleAntoniou, Georgios, Alexandros Papageorgiou, and Panagiota Kanti. 2023. "Probing Modified Gravity Theories with Scalar Fields Using Black-Hole Images" Universe 9, no. 3: 147. https://doi.org/10.3390/universe9030147