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The imitation game reloaded: effective shadows of dynamically robust spinning Proca stars

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arxiv 2402.14919 v1 pith:US6CLZZB submitted 2024-02-22 gr-qc astro-ph.HE

The imitation game reloaded: effective shadows of dynamically robust spinning Proca stars

Ivo Sengo , Pedro V.P. Cunha , Carlos A. R. Herdeiro , Eugen Radu This is my paper
classification gr-qc astro-ph.HE
keywords dynamicallyrobustimagesprocasimilaritiesstarswhenaccretion
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We analyse the lensing images by dynamically robust rotating (mini-)Proca stars surrounded by thin accretion disks. Due to their peculiar geodesic structure we show that these images exhibit striking similarities with the ones of BHs, for appropriately chosen disk intensity profile, when imposing a GRMHD-motivated emission cut off. Additionally, and unlike the non-rotating case, these similarities prevail even when considering equatorial observations. This example illustrates how a horizonless compact object without light rings, with a plausible formation mechanism and dynamically robust, could mimic detailed features of black hole imagiology.

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Cited by 4 Pith papers

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

  1. The continuum spectrum of nonrelativistic multi-frequency Proca stars

    gr-qc 2026-03 conditional novelty 5.5

    At fixed particle number, spherical multi-frequency Proca stars form continuous 1- and 2-parameter families interpolating between discrete stationary states, and a subset with a nodeless component is linearly stable.

  2. Black Hole-Boson Star Binaries: Gravitational Wave Signals and Tidal Disruption

    gr-qc 2026-04 unverdicted novelty 5.0

    Numerical simulations of black hole-boson star binaries show that scalar self-interactions can suppress tidal disruption while radiative efficiency depends on the chosen potential.

  3. Roche limit and stellar disruption in the Simpson--Visser spacetime

    gr-qc 2026-01 unverdicted novelty 5.0

    Tidal forces in the Simpson-Visser spacetime produce Roche radii for stars that depend on observer type and regularization, with some disruptions occurring outside the event horizon for supermassive black holes.

  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

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