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SUMMARY:Detecting nano-Hertz gravitational waves with Pulsar Timing Arrays
DTSTART:20240522T110000Z
DTEND:20240522T120000Z
DTSTAMP:20260417T211200Z
UID:indico-event-10268@indico.mpp.mpg.de
DESCRIPTION:Speakers: Bruce Allen\n\nAround the world\, several groups are
  working to detect a stochastic background of very low frequency gravitati
 onal waves using "pulsar timing arrays".  Such gravitational waves are ge
 nerated by orbiting pairs of extremely massive black holes at cosmological
  distances from Earth.  The "detector" operates at a Galactic-scale\, by 
 exploiting radio pulsars (very stable rapidly-spinning neutron stars) as h
 igh precision clocks.  I'll explain how these detectors operate -- the gr
 avitational waves leave detectable imprints on the radio pulses -- and rev
 iew the current state of the field and its prospects. \nI'll also describ
 e some recent work (arXiv 2205.05637\, 2208.07230\, 2308.05847\, 2401.1432
 9\, 2404.05677) on properties of the "Hellings and Downs correlation". Thi
 s pattern of pulsar timing correlations is the "smoking gun" that should r
 eveal the presence of gravitational waves.\n\nhttps://indico.mpp.mpg.de/ev
 ent/10268/
LOCATION:A.1.01 - Alps  Süd (MPP)
URL:https://indico.mpp.mpg.de/event/10268/
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