Bulletin of the American Physical Society
APS April Meeting 2024
Wednesday–Saturday, April 3–6, 2024; Sacramento & Virtual
Session T12: Signatures of Particle Dark Matter
3:45 PM–5:09 PM,
Saturday, April 6, 2024
SAFE Credit Union Convention Center
Room: Ballroom B2, Floor 2
Sponsoring
Unit:
DAP
Chair: Sofia Stepanoff, Georgia Tech
Abstract: T12.00005 : Searching for Ultralight ALPs with JVLA and VLBA observations
4:33 PM–4:45 PM
Presenter:
Shivani Deshmukh
(Bielefeld University)
Author:
Shivani Deshmukh
(Bielefeld University)
The differential polarization angle measured between the images of strong gravitationally lensed quasars is expected to exhibit a clean ALP-induced birefringence signal which is free of observational and astrophysical systematics. This allows us to probe ALPs at sensitivity comparable to, or better than, lab-experiments. We demonstrate this new technique with the help of existing observations. We also report about the ongoing analysis of ~100 hours of dedicated multi-epoch spectropolarimetric observations of 5 gravitational lens systems using the JVLA and the VLBA.
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