Seminář se koná v úterý ve 13:10 v posluchárně ÚTF MFF UK
v 10. patře katedrové budovy v Tróji, V Holešovičkách 2, Praha 8
Future space-based gravitational-wave detectors like LISA will require highly accurate gravitational wave templates for detecting systems like extreme mass ratio inspirals and estimating their parameters. In our previous work, we considered orbits of a spinning body around a Schwarzschild black hole and numerically calculated contribution of the spin to the gravitational-wave fluxes of energy and angular momentum fluxes from these orbits. Because the spin is small, its contribution to the fluxes can be calculated with much lower precision than the precision of the leading nonspinning part of the fluxes. Therefore, in this work, we expand the linear-in-spin part of the GW fluxes in a post-Newtonian parameter and eccentricity and obtain an approximative analytic solution which is valid for low eccentricities and high separations. We compare the results with the numerical data and, using the approximative fluxes, calculate extreme mass ratio inspirals and their waveforms. Through the mismatch between our approximated inspirals and fully relativistic inspirals we assess the validity of our approximation for expected signals detected by LISA.
Jiří Bičák Oldřich Semerák