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SUMMARY:Pulsar Timing Arrays and Astrometry: Going Beyond the Hellings-Dow
 ns correlation - Gianmassimo Tasinato (Swansea University)
DTSTART:20250609T120000Z
DTEND:20250609T130000Z
UID:TALK231133@talks.cam.ac.uk
CONTACT:Thomas Colas
DESCRIPTION:The detection of gravitational waves (GWs) by pulsar timing ar
 rays (PTAs) opens new avenues for probing the physics of GW sources at nan
 ohertz frequencies. In the same frequency band\, astrometric observations 
 may also enable future GW detections. It is therefore important to investi
 gate the potential for cross-correlating these two complementary approache
 s. \nAccordingly\, I will discuss three topics related to the characteriza
 tion of the stochastic gravitational-wave background using pulsar timing a
 rrays and astrometry. The potential detection of its kinematic dipole. The
  prospects for measuring its circular polarization. A new method for ident
 ifying the possible presence of scalar polarization in the GW background.
LOCATION:CMS\, Pav. B\, CTC Common Room (B1.19) [Potter Room]
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