{"total":15,"items":[{"citing_arxiv_id":"2606.05307","ref_index":102,"ref_count":1,"confidence":0.9,"is_internal_anchor":false,"paper_title":"Constraining the jet base emission of M87* with past and future Event Horizon Telescope observations","primary_cat":"astro-ph.HE","submitted_at":"2026-06-03T18:01:05+00:00","verdict":"UNVERDICTED","verdict_confidence":"LOW","novelty_score":4.0,"formal_verification":"none","one_line_summary":"Synthetic EHT data from semi-analytic jet models show that the 2022 array configuration enables robust recovery of faint horizon-scale jet emission in M87* when jet intensity exceeds a determined lower limit.","context_count":0,"top_context_role":null,"top_context_polarity":null,"context_text":null},{"citing_arxiv_id":"2605.25625","ref_index":13,"ref_count":1,"confidence":0.9,"is_internal_anchor":false,"paper_title":"Periodic orbits and gravitational waveforms around a Schwarzschild black hole with a cloud of strings embedded in perfect fluid dark matter","primary_cat":"gr-qc","submitted_at":"2026-05-25T09:28:15+00:00","verdict":"UNVERDICTED","verdict_confidence":"LOW","novelty_score":5.0,"formal_verification":"none","one_line_summary":"Analysis of how string cloud parameter a and dark matter parameter α alter MBO, ISCO, periodic orbits indexed by q, and the gravitational waveforms generated by those orbits in a modified Schwarzschild spacetime.","context_count":0,"top_context_role":null,"top_context_polarity":null,"context_text":null},{"citing_arxiv_id":"2605.05635","ref_index":53,"ref_count":2,"confidence":0.9,"is_internal_anchor":false,"paper_title":"Adaptive ray tracing, image diagnostics, and photon ring signatures of rotating dark-matter-dressed black holes","primary_cat":"gr-qc","submitted_at":"2026-05-07T03:40:00+00:00","verdict":null,"verdict_confidence":null,"novelty_score":null,"formal_verification":null,"one_line_summary":null,"context_count":1,"top_context_role":"background","top_context_polarity":"background","context_text":"to be evolved dynamically, while𝑝𝑇 and𝑝 𝜙 are fixed by the initial conditions on the observer screen. For the rotating metric (26), the nonvanishing components of the inverse metric are 𝑔𝑇𝑇 =− (𝑅 2 +𝜒 2)2 −𝜒 2Δ𝑖 (𝑅)sin 2 𝜃 Σ Δ𝑖 (𝑅) ,(49) 𝑔𝑇 𝜙 =− 𝜒F 𝑖 (𝑅) Σ Δ𝑖 (𝑅) ,(50) 𝑔 𝑅𝑅 = Δ𝑖 (𝑅) Σ ,(51) 𝑔 𝜃 𝜃 = 1 Σ ,(52) 𝑔 𝜙 𝜙 = Δ𝑖 (𝑅) −𝜒 2 sin2 𝜃 Σ Δ𝑖 (𝑅)sin 2 𝜃 .(53) Using these expressions, the null Hamiltonian becomes 2ℋ=𝑔 𝑇𝑇 𝑝2 𝑇 +2𝑔 𝑇 𝜙 𝑝𝑇 𝑝 𝜙 +𝑔 𝜙 𝜙𝑝2 𝜙 +𝑔 𝑅𝑅 𝑝2 𝑅 +𝑔 𝜃 𝜃 𝑝2 𝜃 =0. (54) It is useful to note that the specific Kerr-like form adopted in Eq. (26) possesses a formal separability structure. Indeed, using the Hamilton-Jacobi ansatz 𝑆=−𝐸𝑇+𝐿 𝑧 𝜙+𝑆 𝑅 (𝑅) +𝑆 𝜃 (𝜃),(55) andmultiplyingthenullHamilton-JacobiequationbyΣ,oneobtains"},{"citing_arxiv_id":"2604.22309","ref_index":28,"ref_count":2,"confidence":0.9,"is_internal_anchor":false,"paper_title":"Effective null geodesics and black hole images in Kruglov nonlinear electrodynamics","primary_cat":"gr-qc","submitted_at":"2026-04-24T07:41:22+00:00","verdict":"UNVERDICTED","verdict_confidence":"LOW","novelty_score":5.0,"formal_verification":"none","one_line_summary":"In Kruglov nonlinear electrodynamics, small positive values of the parameter q produce stable photon orbits outside the event horizon and modify black hole shadows and relativistic images even when the spacetime metric stays close to Reissner-Nordström.","context_count":1,"top_context_role":"background","top_context_polarity":"unclear","context_text":"Forq→0 +, the limit satisfies lim r→∞ h(r) = −1/7, and therefore Eq. (33) cannot be used in this case. The BH shadow analysis commonly employs the EHT constraints on the shadow radius of the supermassive Sgr A* BH. From the analysis of Keck and VLTI ob- servational data, Vagnozziet al.[74] derived the follow- ing bounds on the dimensionless shadow radius (see also Ref. [28]) 4.21< r sh/M <5.56 (2σ),(34) 4.58< r sh/M <5.21 (1σ).(35) 9 6 4 2 0 2 4 6 Y/M q = 0.5 q = 0.1 6 4 2 0 2 4 6 X/M 6 4 2 0 2 4 6 Y/M q = 1 6 4 2 0 2 4 6 X/M q = 2 FIG. 6. Photon trajectories around a Kruglov BH forQ/M= 0.98 with several values ofq, where the black solid circle denotes the location of the outer horizonr + H. The gray, orange, and red curves represent light paths with direct, lensed, and light ring"},{"citing_arxiv_id":"2604.22181","ref_index":7,"ref_count":1,"confidence":0.9,"is_internal_anchor":false,"paper_title":"Shadow dependent phenomenology framework for rotating black hole metric","primary_cat":"gr-qc","submitted_at":"2026-04-24T03:14:59+00:00","verdict":null,"verdict_confidence":null,"novelty_score":null,"formal_verification":null,"one_line_summary":null,"context_count":0,"top_context_role":null,"top_context_polarity":null,"context_text":null},{"citing_arxiv_id":"2604.16551","ref_index":24,"ref_count":1,"confidence":0.9,"is_internal_anchor":false,"paper_title":"Photon rings and shadows of black holes with non-minimal couplings between curvature and electromagnetic field","primary_cat":"gr-qc","submitted_at":"2026-04-17T07:15:39+00:00","verdict":"CONDITIONAL","verdict_confidence":"MODERATE","novelty_score":6.0,"formal_verification":"none","one_line_summary":"Three distinct non-minimal curvature-EM couplings produce different enlargements or reductions of black hole shadows and alter photon ring separations in characteristic ways.","context_count":1,"top_context_role":"background","top_context_polarity":"background","context_text":"[22] M. D. Johnsonet al., Universal interferometric signa- tures of a black hole's photon ring, Sci. Adv.6, eaaz1310 (2020), arXiv:1907.04329 [astro-ph.IM]. [23] A. Grenzebach, V. Perlick, and C. L¨ ammerzahl, Photon Regions and Shadows of Kerr-Newman-NUT Black Holes with a Cosmological Constant, Phys. Rev. D89, 124004 (2014), arXiv:1403.5234 [gr-qc]. [24] S.-W. Wei, Y.-C. Zou, Y.-X. Liu, and R. B. Mann, Cur- vature radius and Kerr black hole shadow, JCAP08, 030, 21 arXiv:1904.07710 [gr-qc]. [25] A. ¨Ovg¨ un,˙I. Sakallı, and J. Saavedra, Shadow cast and Deflection angle of Kerr-Newman-Kasuya spacetime, JCAP10, 041, arXiv:1807.00388 [gr-qc]. [26] M. Wang, S. Chen, and J. Jing, Shadow casted by a Konoplya-Zhidenko rotating non-Kerr black hole, JCAP"},{"citing_arxiv_id":"2604.13223","ref_index":5,"ref_count":1,"confidence":0.9,"is_internal_anchor":false,"paper_title":"Observational constraints on nonlocal black holes via gravitational lensing","primary_cat":"gr-qc","submitted_at":"2026-04-14T18:48:44+00:00","verdict":"UNVERDICTED","verdict_confidence":"LOW","novelty_score":5.0,"formal_verification":"none","one_line_summary":"Nonlocal black holes remain consistent with general relativity at the 1.13-sigma level after joint lensing and quasinormal-mode constraints.","context_count":1,"top_context_role":"background","top_context_polarity":"background","context_text":"Bertiet al., Class. Quant. Grav.32, 243001 (2015), arXiv:1501.07274 [gr-qc]. [3] B. P. Abbottet al.(LIGO Scientific, Virgo), Phys. Rev. Lett.116, 221101 (2016), [Erratum: Phys.Rev.Lett. 121, 129902 (2018)], arXiv:1602.03841 [gr-qc]. [4] K. Akiyamaet al.(Event Horizon Telescope), Astro- phys. 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J. 116, 1009 (1998), arXiv:astro-ph/9805201."},{"citing_arxiv_id":"2604.09046","ref_index":16,"ref_count":1,"confidence":0.9,"is_internal_anchor":false,"paper_title":"Relative Magnification Factor of Point Sources on Accretion Disks","primary_cat":"gr-qc","submitted_at":"2026-04-10T07:10:10+00:00","verdict":"UNVERDICTED","verdict_confidence":"LOW","novelty_score":6.0,"formal_verification":"none","one_line_summary":"Corotating point sources on accretion disks near black holes distort the relative magnification factor distribution, modulating caustics and encoding accretion flow kinematics via time-delayed images.","context_count":1,"top_context_role":"background","top_context_polarity":"background","context_text":"(Event Horizon Telescope), Phys. Rev. Lett.125, 141104 (2020), arXiv:2010.01055 [gr-qc]. [13] M. Wielgus, Phys. Rev. D104, 124058 (2021), arXiv:2109.10840 [gr-qc]. [14] P. Kocherlakotaet al.(Event Horizon Telescope), Phys. Rev. D103, 104047 (2021), arXiv:2105.09343 [gr-qc]. 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Soc.486, 2873 (2019), arXiv:1810.01983 [astro-ph.HE]."},{"citing_arxiv_id":"2603.18963","ref_index":13,"ref_count":1,"confidence":0.9,"is_internal_anchor":false,"paper_title":"Observational Signatures of Rotating Ay\\'{o}n-Beato-Garc\\'{i}a Black Holes: Shadows, Accretion Disks and Images","primary_cat":"gr-qc","submitted_at":"2026-03-19T14:28:37+00:00","verdict":"UNVERDICTED","verdict_confidence":"LOW","novelty_score":4.0,"formal_verification":"none","one_line_summary":"Rotating Ayón-Beato-García black holes produce smaller and sometimes D-shaped shadows whose size constrains the charge parameter ζ to the range 0.132811M–0.213607M when matched to EHT observations of M87* and Sgr A*.","context_count":0,"top_context_role":null,"top_context_polarity":null,"context_text":null},{"citing_arxiv_id":"2603.07714","ref_index":7,"ref_count":1,"confidence":0.9,"is_internal_anchor":false,"paper_title":"Scattering from compact objects: Debye series and Regge-Debye poles","primary_cat":"gr-qc","submitted_at":"2026-03-08T16:33:39+00:00","verdict":"CONDITIONAL","verdict_confidence":"LOW","novelty_score":7.0,"formal_verification":"none","one_line_summary":"An exact Debye-series decomposition of the scattering matrix for waves on compact stars reveals distinct Regge-Debye pole families that dominate amplitudes differently in neutron-star-like and ultracompact regimes.","context_count":0,"top_context_role":null,"top_context_polarity":null,"context_text":null},{"citing_arxiv_id":"2512.02338","ref_index":19,"ref_count":1,"confidence":0.9,"is_internal_anchor":false,"paper_title":"Leading effective field theory corrections to the Kerr metric at all spins","primary_cat":"gr-qc","submitted_at":"2025-12-02T02:16:25+00:00","verdict":"UNVERDICTED","verdict_confidence":"LOW","novelty_score":5.0,"formal_verification":"none","one_line_summary":"Numerical solutions show that leading effective-field-theory corrections to the Kerr metric grow with spin and are largest near extremality.","context_count":1,"top_context_role":"background","top_context_polarity":"background","context_text":"pdf/4/5/685/31566708/nwx116.pdf. [15] M. Punturoet al., Class. Quant. Grav.27, 194002 (2010). [16] (2025), arXiv:2509.08099 [gr-qc]. [17] K. Akiyamaet al.(Event Horizon Telescope), Astro- phys. J. Lett.875, L1 (2019), arXiv:1906.11238 [astro- ph.GA]. [18] K. Akiyamaet al.(Event Horizon Telescope), Astro- phys. J. Lett.930, L12 (2022), arXiv:2311.08680 [astro- ph.HE]. [19] K. Akiyamaet al.(Event Horizon Telescope), Astro- phys. J. Lett.930, L17 (2022), arXiv:2311.09484 [astro- ph.HE]. [20] D. Ayzenberget al., Living Rev. Rel.28, 4 (2025), [Er- ratum: Living Rev.Rel. 28, 7 (2025)], arXiv:2312.02130 [astro-ph.HE]. [21] M. D. Johnsonet al., Galaxies11, 61 (2023), arXiv:2304.11188 [astro-ph.HE]. [22] J. F. Donoghue, inAdvanced School on Effective Theo-"},{"citing_arxiv_id":"2510.18647","ref_index":71,"ref_count":1,"confidence":0.9,"is_internal_anchor":false,"paper_title":"Observational Tests of Regular Black Holes with Scalar Hair and their Stability","primary_cat":"gr-qc","submitted_at":"2025-10-21T13:58:02+00:00","verdict":"UNVERDICTED","verdict_confidence":"LOW","novelty_score":5.0,"formal_verification":"none","one_line_summary":"Regular black holes with phantom scalar hair are constrained by Solar System and EHT observations, with exact relations linking photon sphere Lyapunov exponent to shadow size and impact parameter.","context_count":0,"top_context_role":null,"top_context_polarity":null,"context_text":null},{"citing_arxiv_id":"2508.00203","ref_index":33,"ref_count":1,"confidence":0.9,"is_internal_anchor":false,"paper_title":"Quantum-Corrected Thermodynamics of Conformal Weyl Gravity Black Holes: GUP Effects and Phase Transitions","primary_cat":"gr-qc","submitted_at":"2025-07-31T23:07:32+00:00","verdict":"UNVERDICTED","verdict_confidence":"LOW","novelty_score":3.0,"formal_verification":"none","one_line_summary":"Quantum-corrected thermodynamics of conformal Weyl gravity black holes via GUP and exponential entropy reveals parameter-dependent divergences in heat capacity and shifts in Joule-Thomson inversion points indicating phase transitions.","context_count":0,"top_context_role":null,"top_context_polarity":null,"context_text":null},{"citing_arxiv_id":"2503.12263","ref_index":261,"ref_count":1,"confidence":0.9,"is_internal_anchor":false,"paper_title":"The Science of the Einstein Telescope","primary_cat":"gr-qc","submitted_at":"2025-03-15T21:04:14+00:00","verdict":"UNVERDICTED","verdict_confidence":"LOW","novelty_score":3.0,"formal_verification":"none","one_line_summary":"The paper provides state-of-the-art predictions for the Einstein Telescope's impact on fundamental physics, cosmology, compact-object astrophysics, and multi-messenger astronomy across its proposed configurations.","context_count":0,"top_context_role":null,"top_context_polarity":null,"context_text":null},{"citing_arxiv_id":"2501.07029","ref_index":31,"ref_count":1,"confidence":0.9,"is_internal_anchor":false,"paper_title":"Shadow of the Scalar Hairy Black Hole with Inverted Higgs Potential","primary_cat":"gr-qc","submitted_at":"2025-01-13T03:00:02+00:00","verdict":"UNVERDICTED","verdict_confidence":"LOW","novelty_score":4.0,"formal_verification":"none","one_line_summary":"Hairy black hole shadows and disks grow with horizon scalar value but can mimic Schwarzschild by adjusting horizon radius, with the potential parameter Lambda constrained by supermassive black hole observations.","context_count":0,"top_context_role":null,"top_context_polarity":null,"context_text":null}],"limit":50,"offset":0}