Black holes and solitons in generalized scalar-tensor gravity models

• Grant number: 19/01511-5
• Support type: Regular Research Grants
• Duration: April 01, 2019 - March 31, 2021
• Field of knowledge: Physical Sciences and Mathematics - Physics - Elementary Particle Physics and Fields
• Principal researcher: Betti Hartmann
• Grantee: Betti Hartmann
• Home Institution: Instituto de Física de São Carlos (IFSC). Universidade de São Paulo (USP). São Carlos , SP, Brazil
• Assoc. researchers: Clisthenis Ponce Constantinidis ; Gabriel Luchini Martins ; Jon Urrestilla ; Ruth Gregory ; Yves Brihaye

Abstract

This project deals with the construction of black hole and soliton solutionsin extended scalar-tensor gravity models. While General Relativity remains the best theory we have for the gravitational interaction today, a number of questions arises with respect to observational data as well as general theoretical aspects. In recent years, scalar-tensor gravity models have been suggested to give answers to a number of these problems and typically contain non-minimal couplings between the metric tensor (and quantities derived from it) as well as a scalar field. While these models have been discussed extensively with respect to their phenomenology, little is known about actual solutions to the corresponding equations of motion. These have - in general - to be solved numerically. The aim of this project is to investigate the existence of black hole as well as solitonic, i.e. star-like solutions to the models currently discussed. This project is timely as it allows to test scalar-tensor gravity models that are relevant not only for black hole physics, but also for the primordial universe. Furthermore, once the solutions are known, predictions for observational data such as gravitational waves as well as future measurements of the polarization of the Cosmic Microwave background can be made. (AU)

Scientific publications

(9)

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

BRIHAYE, YVES; CONSOLE, FELIPE; HARTMANN, BETTI. Inflation inside Non-Topological Defects and Scalar Black Holes. SYMMETRY-BASEL, v. 13, n. 1, JAN 2021. (19/01511-5)

BRIHAYE, YVES; DUCOBU, LUDOVIC; HARTMANN, BETTI. Boson and neutron stars with increased density. Physics Letters B, v. 811, DEC 10 2020. (19/01511-5)

BARTON, SIMON; HARTMANN, BETTI; KLEIHAUS, BURKHARD; KUNZ, JUTTA. Spontaneously vectorized Einstein-Gauss-Bonnet black holes. Physics Letters B, v. 817, JUN 10 2021. (19/01511-5)

FODOR, GYULA; COSTA FILHO, ETEVALDO DOS SANTOS; HARTMANN, BETTI. Calculation of multipole moments of axistationary electrovacuum spacetimes. Physical Review D, v. 104, n. 6, SEP 7 2021. (19/01511-5)

BRIHAYE, YVES; CAPOBIANCO, ROGERIO; HARTMANN, BETTI. Spontaneous scalarization of self-gravitating magnetic fields. Physical Review D, v. 103, n. 12, JUN 9 2021. (19/01511-5)

BRIHAYE, YVES; HARTMANN, BETTI; APRILE, NATHALIA PIO; URRESTILLA, JON. Scalarization of asymptotically anti-de Sitter black holes with applications to holographic phase transitions. Physical Review D, v. 101, n. 12, JUN 11 2020. (19/01511-5)

BRIHAYE, YVES; HARTMANN, BETTI. Spontaneous scalarization of boson stars. Journal of High Energy Physics, n. 9, SEP 6 2019. (19/01511-5, 16/12605-2)

BRIHAYE, YVES; HARTMANN, BETTI. Strong gravity effects of charged Q-clouds and inflating black holes. Classical and Quantum Gravity, v. 38, n. 6, MAR 18 2021. (19/01511-5)

HARTMANN, BETTI; LUCHINI, GABRIEL; CONSTANTINIDIS, CLISTHENIS P.; PEREIRA, CARLOS F. S.. Real scalar field kinks and antikinks and their perturbation spectra in a closed universe. Physical Review D, v. 101, n. 7, APR 3 2020. (19/01511-5)