The role of the supermassive black hole spin in the estimation of the EMRI event rate

摘要: One of the main channels interactions in galactic nuclei between stars and central massive black hole (MBH) is gradual inspiral compact remnants into MBH due to emission gravitational radiation. This process known as an \Extreme Mass Ratio Inspiral" (EMRI). Previous works about estimation how many events space observatories such LISA will be able observe during its operational time dier orders magnitude, complexity problem. Nevertheless, a common result all investigations that possibility object merges with after only one intense burst GWs much more likely than slow adiabatic inspiral, EMRI. The later referred \plunge" because dives MBH, crosses horizon lost probe strong gravity for eLISA. event rates plunges are magnitude larger inspirals. On other hand, nature MBH’s most Kerr spin has been sized up high. We calculate number periapsis passages set on extremely radial orbit goes through before being actually swallowed by we then translate it rate LISA-like observatory, proposed ESA mission eLISA/NGO. prove \plunging" conceptually indistinguishable from adiabatic, inspiral; spend average hundred thousands cycles bandwidth detector two years mission. important impact rate, enhancing some cases signicantly,