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UID:730@qft.physik.hu-berlin.de
DTSTART;TZID=Europe/Berlin:20160601T133000
DTEND;TZID=Europe/Berlin:20160601T143000
DTSTAMP:20160531T204849Z
URL:https://qft.physik.hu-berlin.de/next-seminars/jan-steinhoffaei/
SUMMARY:Jan Steinhoff(AEI) - QFT methods for gravitational wave astronomy: 
 application to spin effects and dynamic tides
DESCRIPTION:The recent detection of a gravitational wave from a binary blac
 k hole  merger by the aLIGO detectors heralds the age of gravitational wav
 e astronomy. Compact binaries composed of black holes and/ or neutron star
 s are the most promising source for the network of advanced gravitational 
 wave detectors. The influence of finite-size effects (e.g.\, spin or tidal
  deformation) on the binary evolution can be large. This talk gives an ove
 rview of recent progress in the analytic description of finite-size effect
 s by the use of effective field theory methods. The effective action of th
 e compact objects takes the form of a point-particle action augmented by d
 ynamical degrees of freedom related to its multipole moments. This enabled
  the computation of spin effects to a very high order using methods from q
 uantum field theory\, i.e.\, Feynman integral calculus. While spin effects
  are very important for the dynamics of black holes\, tidal deformation ef
 fects are crucial for neutron stars and can provide hints on the nuclear e
 quation of state. We model tidal effects in terms of an effective harmonic
  oscillator action for a dynamical quadrupole. This model can describe res
 onances of oscillation modes of the neutron star with the orbital motion.
CATEGORIES:Research Seminars
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