skip to main content
Idioma:

Detection of scalar fields by extreme mass ratio inspirals with a Kerr black hole

Hong Guo Yunqi Liu; Chao Zhang; Yungui Gong; Wei-Liang Qian; Rui-Hong Yue

Physical review D v.106, p.024047-, 2022

Wuhan 2022

Item não circula. Consulte sua biblioteca.(Acessar)

  • Título:
    Detection of scalar fields by extreme mass ratio inspirals with a Kerr black hole
  • Autor: Hong Guo
  • Yunqi Liu; Chao Zhang; Yungui Gong; Wei-Liang Qian; Rui-Hong Yue
  • Assuntos: COSMOLOGIA; GRAVIDADE; ONDAS GRAVITACIONAIS
  • É parte de: Physical review D v.106, p.024047-, 2022
  • Notas: Disponível em: https://doi.org/10.1103/PhysRevD.106.024047. Acesso em: 19 ago. 2023.
  • Descrição: We study extreme mass ratio inspirals occurring in modified gravity, for which the system is modeled by a small compact object with scalar charge spiraling into a supermassive Kerr black hole. Besides the tensorial gravitational waves arising from the metric perturbations, radiation is also induced by the scalar field. The relevant metric and scalar perturbations are triggered by the orbital motion of the small object, which give rise to a system of inhomogeneous differential equations under the adiabatic approximation. Such a system of equations is then solved numerically using a Green’s function furnished by the solutions of the corresponding homogeneous equations. To explore the present scenario from an observational perspective, we investigate how the pertinent observables are dependent on specific spacetime configurations. In this regard, the energy fluxes and the gravitational-wave dephasing accumulated during the process are evaluated, as functions of the scalar charge, mass ratio, and spin of the central supermassive black hole. In particular, the presence of additional scalar emission leads to a more significant rate of overall energy loss which, in turn, decreases the total number of orbital cycles before the small object plunges into the central black hole. Moreover, for a central black hole with a higher spin, the imprints of the scalar charge on the resultant gravitational radiation are found to be more significant, which indicates the possibility of detecting the scalar charge.
  • Editor: Wuhan
  • Data de criação/publicação: 2022
  • Formato: p. 024047.
  • Idioma: Inglês
Links
Voltar para lista de resultados

  • Realização: ABCD-USP USP   Logos de Redes Sociais: Freepik

Buscando em bases de dados remotas. Favor aguardar.