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Astrophysics, Gravitation and Cosmology Seminar - Jose Maria Ezquiaga "The gravitational wave universe through the lens"

Event Type
Seminar/Symposium
Sponsor
Department of Physics
Location
Via Zoom
Virtual
Date
Oct 7, 2020   12:00 pm  
Speaker
Jose Maria Ezquiaga
Contact
Brandy Shier
E-Mail
bshier@illinois.edu
Views
22
Originating Calendar
Physics - Astrophysics, Gravitation, and Cosmology Seminar

The discovery of strong gravitational lensing of gravitational waves (GWs) would represent a major advance in astronomy. Assessing the probability that two or more events are lensed images of the same source requires a good understanding of the properties of the lensed images. In this talk I will discuss the key role of lensing phase shifts. Contrary to electromagnetic radiation intuition, lensing phase shifts could distort the GW waveform so that it differs from the (unlensed) general relativity prediction. I will quantify how relevant these distortions are for current GW detectors and outline an optimal lensing search strategy. Next, I will present the prospects of testing theories beyond general relativity with GW lensing, discussing novel effects such as GW birefringence, echoes and shadows

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