Probing the strong gravity regime with eLISA: Progress on EMRIs
  The capture of a stellar-mass compact object by a supermassive black hole and the subsequent inspiral (driven by gravitational radiation emission) constitute one of the most important sources of gravitational waves for space-based observatories like eLISA/NGO. In this article we describe their potential as high-precision tools that can be used to perform tests of the geometry of black holes and also of the strong field regime of gravity. 
Carlos F. Sopuerta (ICE (CSIC-IEEC))
gr-qc astro-ph.CO astro-ph.HE hep-th