Journal
EUROPEAN PHYSICAL JOURNAL C
Volume 80, Issue 5, Pages -Publisher
SPRINGER
DOI: 10.1140/epjc/s10052-020-8021-8
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Funding
- National Natural Science Foundation of China [11573015, 11833004]
- Strategic Priority Research Program of Chinese Academy of Sciences [XDA15016700]
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We study strong deflection gravitational lensing by a Lee-Wick ultracompact object. Its unique feature is a series of relativistic images inside its photon sphere, which are absent in the case of a black hole. We obtain its observables and estimate them for the supermassive black holes Sgr A* and M87* respectively in the Galactic center and in the center of M87. We find that the innermost relativistic image is a very promising signature according to its angular separation from the photon sphere and its considerable brightness. A preliminary bound on the UV scale of such an object is estimated based on the shadow of M87*.
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