2020/07/08 by H. Khodabakhshi, Robert B. Mann · 12 citations
Physics and Astronomy · #Astrophysical Phenomena and Observations #Astrophysics #Black hole (networking) #Classical mechanics #Cosmology and Gravitation Theories #Einstein #Galaxies: Formation, Evolution, Phenomena #Galaxy #General relativity #Gravitation #Gravitational lens #Physics #Quartic function #Redshift #Strong gravitational lensing #Supermassive black hole #gr-qc
paper · pdf · doi:10.1103/physrevd.103.024017
published in Physical review. D/Physical review. D. 103(2) (American Physical Society) · 20 pages. arXiv admin note: substantial text overlap with arXiv:1810.10657
arxiv created 2020/07/08 · openalex publication_date 2021/01/12 · arxiv updated 2021/01/20 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We investigate gravitational lensing effects of spherically symmetric black holes in Einstein quartic gravity (EQG). Using an approximate analytic solution obtained by continued fraction methods we consider the predictions of EQG for lensing effects by supermassive black holes at the center of our galaxy and others in comparison with general relativity (GR). We numerically compute both time delays and angular positions of images and find that they can deviate from GR by as much as milliarcseconds, suggesting that observational tests of EQG are feasible in the near future. We discuss the challenges of distinguishing the predictions of EQG from those of Einstein cubic gravity.