All Outputs (6)

Neutron star scalarization with Gauss-Bonnet and Ricci scalar couplings (2021)
Journal Article
Ventagli, G., Antoniou, G., Lehébel, A., & Sotiriou, T. P. (2021). Neutron star scalarization with Gauss-Bonnet and Ricci scalar couplings. Physical Review D, 104(12), Article 124078. https://doi.org/10.1103/PhysRevD.104.124078

Spontaneous scalarization of neutron stars has been extensively studied in the Damour and Esposito-Farèse model, in which a scalar field couples to the Ricci scalar or, equivalently, to the trace of the energy-momentum tensor. However, scalarization... Read More about Neutron star scalarization with Gauss-Bonnet and Ricci scalar couplings.

Probing the nature of black holes: Deep in the mHz gravitational-wave sky (2021)
Journal Article
Baibhav, V., Barack, L., Berti, E., Bonga, B., Brito, R., Cardoso, V., …Zimmerman, A. (2021). Probing the nature of black holes: Deep in the mHz gravitational-wave sky. Experimental Astronomy, 51(3), 1385-1416. https://doi.org/10.1007/s10686-021-09741-9

Black holes are unique among astrophysical sources: they are the simplest macroscopic objects in the Universe, and they are extraordinary in terms of their ability to convert energy into electromagnetic and gravitational radiation. Our capacity to pr... Read More about Probing the nature of black holes: Deep in the mHz gravitational-wave sky.

Black hole scalarization with Gauss-Bonnet and Ricci scalar couplings (2021)
Journal Article
Antoniou, G., Lehébel, A., Ventagli, G., & Sotiriou, T. P. (2021). Black hole scalarization with Gauss-Bonnet and Ricci scalar couplings. Physical Review D, 104(4), Article 044002. https://doi.org/10.1103/PhysRevD.104.044002

Spontaneous scalarization is a gravitational phenomenon in which deviations from general relativity arise once a certain threshold in curvature is exceeded, while being entirely absent below that threshold. For black holes, scalarization is known to... Read More about Black hole scalarization with Gauss-Bonnet and Ricci scalar couplings.

Numerical black hole solutions in modified gravity theories: Axial symmetry case (2021)
Journal Article
Sullivan, A., Yunes, N., & Sotiriou, T. P. (2021). Numerical black hole solutions in modified gravity theories: Axial symmetry case. Physical Review D, 103(12), 1-16. https://doi.org/10.1103/physrevd.103.124058

We extend a recently developed numerical code to obtain stationary, axisymmetric solutions that describe rotating black hole spacetimes in a wide class of modified theories of gravity. The code utilizes a relaxed Newton-Raphson method to solve the fu... Read More about Numerical black hole solutions in modified gravity theories: Axial symmetry case.

Compact object scalarization with general relativity as a cosmic attractor (2021)
Journal Article
Antoniou, G., Bordin, L., & Sotiriou, T. P. (2021). Compact object scalarization with general relativity as a cosmic attractor. Physical Review D, 103(2), Article 024012. https://doi.org/10.1103/PhysRevD.103.024012

We demonstrate that there are theories that exhibit spontaneous scalarization in the strong gravity regime while having general relativity with a constant scalar as a cosmological attractor. We identify the minimal model that has this property and di... Read More about Compact object scalarization with general relativity as a cosmic attractor.

Spin-Induced Scalarized Black Holes (2021)
Journal Article
Herdeiro, C. A., Radu, E., Silva, H. O., Sotiriou, T. P., & Yunes, N. (2021). Spin-Induced Scalarized Black Holes. Physical Review Letters, 126(1), Article 011103. https://doi.org/10.1103/PhysRevLett.126.011103

It was recently shown that a scalar field suitably coupled to the Gauss-Bonnet invariant G can undergo a spin-induced linear tachyonic instability near a Kerr black hole. This instability appears only once the dimensionless spin j is sufficiently lar... Read More about Spin-Induced Scalarized Black Holes.