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SUMMARY:Challenges in Gravitational-Wave Modelling of Extreme-Mass-Ratio I
 nspirals - Priscilla Cañizares (IOA Cambridge)
DTSTART:20130517T120000Z
DTEND:20130517T130000Z
UID:TALK44525@talks.cam.ac.uk
CONTACT:Dr Joan Camps
DESCRIPTION:Extreme-Mass-Ratio Inspirals (EMRIs) are astrophysical systems
  which are composed of a massive black hole (order 10E6 Msun) and a compac
 t star CS (order 5Msun). Due to the nature of the system\, the compact sta
 r (CS) can complete many orbits deep inside the massive black hole (MBH) p
 otential whilst radiating GWs that carry imprinted the structure of the MB
 H spacetime. Therefore\, EMRI detection offers a unique way to obtain dire
 ct information about the strong field near the MBH horizon. However\, for 
 EMRI detection\,  its orbit needs  to be modelled very accurately\, which 
 in practice means solving the two body problem in General Relativity. To a
 ccurately model the CS motion\, we rely on perturbation theory\, where the
  inspiral is driven by the action of a local self-force. The computation o
 f the self-force is still an open problem due to its mathematical and tech
 nical complexity. Moreover\, along its evolution an EMRI might encounter r
 esonant orbits\, adding further difficulty to the modelling. In this talk 
 I will review these two problems in EMRI modelling and the research that w
 e are developing to address them.
LOCATION:Pavilion B Potter Room (B1.19)
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