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General relativistic magnetohydrodynamic simulations of accretion onto exotic compact objects

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arxiv 2408.09893 v2 pith:YNRCTYLK submitted 2024-08-19 astro-ph.HE gr-qc

Héctor R. Olivares-Sánchez , Prashant Kocherlakota , Carlos A. R. Herdeiro This is my paper
classification astro-ph.HEgr-qc
keywords objectscompactgeneralaccretionexoticgrmhdmodelonto
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Some of the extensions to general relativity and to the Standard Model of particle physics predict families of hypothetical compact objects, collectively known as exotic compact objects (ECOs). This category can be defined to encompass non-Kerr black holes both within and beyond general relativity, as well as horizonless compact objects such as boson stars. In order to model observational signatures and identify possible detections, it is crucial to understand the interaction between these objects and their surrounding medium, usually plasmas described by the equations of general relativistic magnetohydrodynamics (GRMHD). To this end, we review the existent literature on GRMHD simulations of accretion onto these objects. These cover a variety of objects and accretion patterns. We conclude by listing possible directions to continue exploring this relatively young field.

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Cited by 5 Pith papers

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

  1. Tidal deformation of an accreting compact object

    gr-qc 2026-07 conditional novelty 5.0 of 10

    For perfectly reflecting Schwarzschild-like ECOs, the log-compactness scaling of static scalar and spin-1 Love numbers survives a thin accretion disk, which mainly amplifies the response magnitude.

  2. Broadened Lensing Rings of Compact Boson Stars: Enhanced Imprint of Accretion Flow in Images and Visibilities

    astro-ph.HE 2026-06 unverdicted novelty 5.0 of 10

    Compact boson stars exhibit broader gravitational lensing rings than black holes, resulting in images and visibilities that depend more strongly on the structure of the accretion flow.

  3. Testing solitonic boson star interpretations of Sagittarius A* with near-infrared flare astrometry

    astro-ph.HE 2026-04 unverdicted novelty 5.0 of 10

    Fitting GRAVITY flare astrometry to solitonic boson star models requires masses larger than 4.3 million solar masses, with more diffuse models yielding values closer to the standard black hole mass and thus placing st...

  4. Bayesian Analysis of Massive Boson Star Models for Sagittarius A* Using Near-Infrared Astrometry Data

    astro-ph.HE 2026-05 unverdicted novelty 4.0 of 10

    Bayesian analysis shows current near-IR astrometry data cannot distinguish massive boson stars from Schwarzschild black holes for Sgr A*.

  5. Sagittarius A* near-infrared flares polarization as a probe of space-time I: Non-rotating exotic compact objects

    astro-ph.HE 2025-06 unverdicted novelty 4.0 of 10

    Simulations show current GRAVITY data cannot distinguish exotic compact object models from black holes for Sgr A* flares, but GRAVITY+ sensitivity may allow detection of some models unless the hot spot is modeled with...

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