We establish a generic, fully-relativistic formalism to study
    gravitational-wave emission by extreme-mass-ratio systems in
    spherically-symmetric, non-vacuum black-hole spacetimes. The potential
    applications to astrophysical setups range from black holes accreting baryonic
    matter to those within axionic clouds and dark matter environments, allowing to
    assess the impact of the galactic potential, of accretion, gravitational drag
    and halo feedback on the generation and propagation of gravitational-waves. We
    apply our methods to a black hole within a halo of matter. We find fluid modes
    imparted to the gravitational-wave signal (a clear evidence of the black hole
    fundamental mode instability) and the tantalizing possibility to infer galactic
    properties from gravitational-wave measurements by sensitive, low-frequency

    Source link


    Leave A Reply