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• W4308709916 abstract "We study the linear polarization from the accretion disk around a class of static traversable wormholes. Applying the simplified model of a magnetized fluid ring orbiting in the equatorial plane, we search for characteristic signatures, which could distinguish wormhole from black hole spacetimes by their polarization properties. For the purpose we analyze the direct polarized images for different inclination angles, the strongly lensed indirect images, and the polarized radiation which reaches the asymptotic observer through the wormhole throat, and compare to the Schwarzschild black hole. For small inclination angles the two types of compact objects lead to a very similar polarization pattern of the direct images. More significant distinctions are observed for the strongly lensed indirect images, where the polarization intensity in the wormhole spacetimes can grow up to an order of magnitude compared to the Schwarzschild black hole. Detecting radiation from the region across the wormhole throat leads to the formation of an additional structure of ring images with distinct polarization properties. The twist of the polarization vector around the ring is less pronounced, thus modifying the polarization pattern, and the polarization intensity can increase with an order of magnitude compared to the radiation from our Universe. Thus, while it could be difficult to distinguish wormhole spacetimes by their direct polarized images, the strongly lensed images and the polarization of the radiation through the wormhole throat provide characteristic signatures which can serve as probes for horizonless objects.10 MoreReceived 15 July 2022Accepted 21 September 2022DOI:https://doi.org/10.1103/PhysRevD.106.104024© 2022 American Physical SocietyPhysics Subject Headings (PhySH)Research AreasGeneral relativityGravitation, Cosmology & Astrophysics" @default.
• W4308709916 created "2022-11-14" @default.
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• W4308709916 date "2022-11-10" @default.
• W4308709916 modified "2023-10-01" @default.
• W4308709916 title "Polarized image of equatorial emission in horizonless spacetimes: Traversable wormholes" @default.
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• W4308709916 doi "https://doi.org/10.1103/physrevd.106.104024" @default.
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