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Accretion disk luminosity for black holes surrounded by dark matter

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arxiv 2006.01269 v1 pith:PK7BZH3Y submitted 2020-06-01 astro-ph.HE gr-qc

Kuantay Boshkayev , Anuar Idrissov , Orlando Luongo , Daniele Malafarina This is my paper
classification astro-ph.HEgr-qc
keywords blackdarkmatterluminositydiskholeholesaccretion
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We consider the observational properties of a static black hole space-time immersed in a dark matter envelope. We thus investigate how the modifications to geometry, induced by the presence of dark matter affect the luminosity of the black hole's accretion disk. We show that the same disk's luminosity produced by a black hole in vacuum may be produced by a smaller black hole if surrounded by dark matter under certain conditions. In particular, we demonstrate that the luminosity of the disk is markedly altered by dark matter's presence, suggesting that mass estimation of distant super-massive black holes may be changed if they are immersed in dark matter. We argue that a similar effect holds in more realistic scenarios and we discuss about the refractive index related to dark matter lensing. Hence we show how this may help explain the observed luminosity of super-massive black holes in the early universe.

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Cited by 4 Pith papers

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

  1. Matter environments around black holes: geodesics, light rings, and ultracompact configurations

    gr-qc 2025-12 conditional novelty 5.0 of 10

    Dark-matter halos modeled as Einstein clusters generically move the ISCO inward and the light ring outward, and ultracompact halos can add extra light rings, trapped modes, and secondary horizons.

  2. Bondi accretion disk luminosity around neutral and charged Simpson-Visser spacetimes

    gr-qc 2025-07 reject novelty 5.0 of 10

    Bondi accretion is computed in Simpson-Visser and charged Simpson-Visser spacetimes, but the reported critical (sonic) radii are not supported by the paper's own equations.

  3. Epicyclic oscillations and accretion disk around a special Buchdahl-inspired spacetime

    gr-qc 2025-07 conditional novelty 4.0 of 10

    The Buchdahl-inspired metric shifts the ISCO inward for positive k tilde and produces QPO and disk profiles that the authors fit to microquasar data, claiming 0.03<k<0.19.

  4. Observable thin accretion disk around a self-dual black hole in loop quantum gravity

    gr-qc 2025-09 conditional novelty 3.0 of 10

    A self-dual loop quantum black hole is shown to look smaller and brighter than Schwarzschild in thin disk models, with the polymer parameter P bounded by Mercury and S2 star data.

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