Stellar structure models in modified theories of gravity: Lessons and challenges

GJ Olmo, D Rubiera-Garcia, A Wojnar - Physics Reports, 2020 - Elsevier
The understanding of stellar structure represents the crossroads of our theories of the
nuclear force and the gravitational interaction under the most extreme conditions observably …

Spontaneous scalarization

DD Doneva, FM Ramazanoğlu, HO Silva… - Reviews of Modern …, 2024 - APS
Scalarization is a mechanism that endows strongly self-gravitating bodies, such as neutron
stars and black holes, with a scalar-field configuration. It resembles a phase transition in that …

Modified gravity and cosmology

EN Saridakis, R Lazkoz, V Salzano, PV Moniz… - 2021 - Springer
The dawn of the twenty-first century came with very positive prospects for gravity, cosmology,
and astrophysics. Technological progress made it possible for cosmology to enter to its …

[PDF][PDF] Scalarization

DD Doneva, FM Ramazanoğlu, HO Silva… - arXiv preprint arXiv …, 2022 - pure.mpg.de
Exploring the nature of gravity in the strong curvature regime is seeing a surge of interest
lately. This is expected to intensify, as it is driven by current and future observations of …

Radial oscillations and stability of compact stars in f (R, T)= R+ 2β T gravity

JMZ Pretel, SE Jorás, RRR Reis… - Journal of Cosmology …, 2021 - iopscience.iop.org
We examine the static structure configurations and radial stability of compact stars within the
context of f (R, T) gravity, with R and T standing for the Ricci scalar and trace of the energy …

Effective-action model for dynamical scalarization beyond the adiabatic approximation

M Khalil, RFP Mendes, N Ortiz, J Steinhoff - Physical Review D, 2022 - APS
In certain scalar-field extensions to general relativity, scalar charges can develop on
compact objects in an inspiraling binary—an effect known as dynamical scalarization. This …

Binary neutron star mergers in massive scalar-tensor theory: Properties of postmerger remnants

ATL Lam, HJ Kuan, M Shibata, K Van Aelst, K Kiuchi - Physical Review D, 2024 - APS
We investigate the properties of postmerger remnants of binary neutron star mergers in the
framework of Damour–Esposito-Farese-type scalar-tensor theory of gravity with a massive …

Neutron stars in massive scalar-Gauss-Bonnet gravity: Spherical structure and time-independent perturbations

R Xu, Y Gao, L Shao - Physical Review D, 2022 - APS
The class of scalar-tensor theories with the scalar field coupling to the Gauss-Bonnet
invariant has drawn great interest since solutions of spontaneous scalarization were found …

Ultra-long-lived quasi-normal modes of neutron stars in massive scalar-tensor gravity

JL Blázquez-Salcedo, FS Khoo, J Kunz - Europhysics Letters, 2020 - iopscience.iop.org
The spectrum of frequencies and characteristic times that compose the ringdown phase of
gravitational waves emitted by neutron stars carries information about the matter content (the …

Gravitational waves from accretion-induced descalarization in massive scalar-tensor theory

HJ Kuan, AG Suvorov, DD Doneva, SS Yazadjiev - Physical Review Letters, 2022 - APS
Many classes of extended scalar-tensor theories predict that dynamical instabilities can take
place at high energies, leading to the formation of scalarized neutron stars. Depending on …