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SUMMARY:Gravitational-Wave Asteroseismology with f-Mode Dynamic Tides in C
 ompact Binary Inspirals - Patricia Schmidt (University of Birmingham)
DTSTART:20191108T130000Z
DTEND:20191108T140000Z
UID:TALK130153@talks.cam.ac.uk
CONTACT:Nathan Johnson-McDaniel
DESCRIPTION:Gravitational waves (GWs) from colliding neutron star binaries
  provide a unique means to probe matter and fundamental physics at supranu
 clear densities. Whilst adiabatic tidal effects related to the tidal defor
 mability of the star leave the strongest imprint in the gravitational-wave
  signal\, additional dynamical tidal effects due to fundamental oscillatio
 n modes (f-modes) arise at late times in the binary inspiral\, modifying t
 he GW phase at high frequencies. In General Relativity\, the tidal deforma
 bility and the f-mode frequency are tied to each other through quasi-unive
 rsal relations - this may not be true in alternative theories of gravity o
 r for exotic compact objects. Thus\, extracting information not only on th
 e tidal deformability but also on the frequencies of fundamental modes has
  the potential to enable novel tests of GR and matter at the extreme.\nIn 
 this seminar\, I will first present a new approximate closed-form model fo
 r the GW phase from dynamical tides for circular\, nonspinning compact bin
 aries. This additional tidal phase depends explicitly on the f-mode freque
 ncy of each compact object\, making f-mode asteroseismology an accessible 
 observable with GW detections of the inspiral phase. I will then show that
  without invoking universal relations\, we can place a lower limit on the 
 f-mode frequency for current GW observations. In a re-analysis of&nbsp\;GW
 170817\,&nbsp\;we estimate a lower limit on the f-mode frequency consisten
 t with the predictions from universal relations. Finally\, I will present 
 prospects for measuring the f-mode frequency from inspiraling neutron star
  binaries with future GW observatories.
LOCATION:Pavilion B Potter Room (B1.19)
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