Can we Detect Intermediate Mass Ratio Inspirals?

Details Can we Detect Intermediate Mass Ratio Inspirals? Can we Detect Intermediate Mass Ratio Inspirals?

2008-11-02

arxiv.org/abs/0811.0138v3

Class.Quant.Grav.26:094036,2009

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

Updated to match published version

Scientific paper

10.1088/0264-9381/26/9/094036

Gravitational waves emitted during intermediate-mass-ratio inspirals (IMRIs) of intermediate-mass black holes (IMBHs) into supermassive black holes could represent a very interesting source for LISA. Similarly, IMRIs of stellar-mass compact objects into IMBHs could be detectable by Advanced LIGO. At present, however, it is not clear what waveforms could be used for IMRI detection, since the post-Newtonian approximation breaks down as an IMRI approaches the innermost stable circular orbit, and perturbative solutions are only known to the lowest order in the mass ratio. We discuss the expected mismatches between approximate and true waveforms, and the choice of the best available waveform as a function of the mass ratio and the total mass of the system. We also comment on the significance of the spin of the smaller body and the need for its inclusion in the waveforms.

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