Heidelberg 2022 – wissenschaftliches Programm

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GR: Fachverband Gravitation und Relativitätstheorie

GR 5: Gravitational Waves

GR 5.3: Vortrag

Dienstag, 22. März 2022, 16:55–17:15, GR-H2

Interference of strongly lensed Gravitational Waves — •Stefano Savastano¹, Filippo Vernizzi², and Miguel Zumalacarregui¹ — ¹Max Planck Institute for Gravitational Physics (Albert Einstein Institute), Am Mühlenberg 1, D-14476 Potsdam-Golm, Germany — ²Institut de Physique Theorique, Universite Paris Saclay CEA, CNRS, 91191 Gif-sur-Yvette, France

Gravitational waves (GW) can be lensed by inhomogeneities on their journey from source to observer, just as electromagnetic radiation. Lens parameters can be extracted from the phase evolution of lensed signals. Continuous GWs (CGW) have a negligible frequency evolution, so the full degeneracy between source and lens parameters limits the extraction. I will discuss how studying the interference pattern produced by strongly lensed CGWs images can enhance the inference of lens parameters. In particular, I will show that the relative motion of the lens to the source or a small frequency evolution can break this degeneracy for some systems. Finally, I will discuss detection perspectives of CGWs lensing for Earth and space-based detectors and elaborate on some possible applications of this tool.