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Testing General Relativity with NuSTAR data of Galactic Black Holes

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arxiv 2012.10669 v2 pith:ZJDZV237 submitted 2020-12-19 astro-ph.HE gr-qc

Ashutosh Tripathi , Yuexin Zhang , Askar B. Abdikamalov , Dimitry Ayzenberg , Cosimo Bambi , Jiachen Jiang , Honghui Liu , Menglei Zhou This is my paper
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keywords blackconstraintsholesgalacticgeneralkerrnustarrelativity
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Einstein's theory of General Relativity predicts that the spacetime metric around astrophysical black holes is described by the Kerr solution. In this work, we employ state-of-the-art in relativistic reflection modeling to analyze a selected set of NuSTAR spectra of Galactic black holes to obtain the most robust and precise constraints on the Kerr black hole hypothesis possible today. Our constraints are much more stringent than those from other electromagnetic techniques, and with some sources we get stronger constraints than those currently available from gravitational waves.

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Cited by 8 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. Testing non-circular black hole spacetime with X-ray reflection

    gr-qc 2026-02 conditional novelty 6.0 of 10

    X-ray reflection data for EXO 1846–031 cannot distinguish the non-circular deformation parameter ℓ_NP from zero, remaining consistent with the Kerr hypothesis.

  2. A Space Mission to Earth's Nearest Black Hole: Reality or Science Fiction?

    gr-qc 2026-07 conditional novelty 4.0 of 10

    An interstellar nanocraft mission to a nearby black hole is technologically speculative but potentially feasible within decades and could deliver precision strong-field tests of General Relativity.

  3. Testing Black Holes with Interstellar Missions: II. Flyby Probes

    gr-qc 2026-07 unverdicted novelty 4.0 of 10

    Flyby probes without spacecraft deceleration may still enable black-hole and GR tests beyond what Solar System observatories can achieve for the foreseeable future.

  4. Testing Black Holes with Interstellar Missions: I. Orbiting Probes

    gr-qc 2026-05 unverdicted novelty 4.0 of 10

    Preliminary analysis of orbiting spacecraft around a black hole to test the compact object's nature and General Relativity under the assumption of deceleration capability.

  5. Improved Constraints on Non-Kerr Deviations from Binary Black Hole Inspirals Using GWTC-4 Data

    gr-qc 2026-04 conditional novelty 4.0 of 10

    GWTC-4 inspirals yield tighter constraints on Johannsen parameters α13 and ε3, both consistent with zero and thus with the Kerr geometry.

  6. Improved Constraints on Non-Kerr Deviations from Binary Black Hole Inspirals Using GWTC-4 Data

    gr-qc 2026-04 unverdicted novelty 3.0 of 10

    Bayesian constraints from GWTC-4 binary black hole inspirals show Johannsen metric deformation parameters α13 and ε3 consistent with zero, supporting the Kerr hypothesis.

  7. An interstellar mission to the closest black hole?

    gr-qc 2025-09 conditional novelty 3.0 of 10

    If a black hole lies within about 20 light-years, a laser-propelled nanocraft could reach it in roughly a century and test Einstein's theory and event horizons.

  8. Physics and Astrophysics of Black Holes with eXTP

    astro-ph.HE 2026-07 accept novelty 2.0 of 10

    eXTP’s larger effective area and simultaneous polarimetry will tighten black-hole spin and Kerr-deviation constraints relative to NICER for the same exposure.

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