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Shadows and quasinormal modes of the Bardeen black hole in cloud of strings

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Abstract

We investigate the black hole solution of Einstein’s gravity coupled with non-linear electrodynamics (NED) source in the background of a cloud of strings. We analyze the horizon structure and optical features of the black hole. The photon radius and shadows are obtained as a function of black hole parameters. We observe that the size of the shadow image is bigger than its horizon radius and photon sphere. We also study the quasi-normal modes using WKB formula for this black hole. The dependence of shadow radius and quasi-normal modes on black hole parameters reflects that they are mimicker to each other.

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Data Availability Statement

Data sharing is not applicable to this article as no data sets were generated or analyzed during the current study.

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Acknowledgements

The work of BKV is supported by UGC fellowship. DVS thanks to the DST-SERB project (Grant No. EEQ/2022/000824).

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Authors and Affiliations

  1. Department of Physics, Institute of Science, Banaras Hindu University, Varanasi, 221005, India

    Bijendra Kumar Vishvakarma

  2. Department Physics, Institute of Applied Science and Humanities, GLA University, Mathura, Uttar Pradesh, 281406, India

    Dharm Veer Singh

  3. Visiting Associate: Inter-University Center of Astronomy and Astrophysics (IUCAA), Pune, India

    Dharm Veer Singh

  4. Department of Physics, Institute of Science, Banaras Hindu University, Varanasi, 221005, India

    Sanjay Siwach

Authors
  1. Bijendra Kumar Vishvakarma
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  2. Dharm Veer Singh
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  3. Sanjay Siwach
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Correspondence to Sanjay Siwach.

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Vishvakarma, B.K., Singh, D.V. & Siwach, S. Shadows and quasinormal modes of the Bardeen black hole in cloud of strings. Eur. Phys. J. Plus 138, 536 (2023). https://doi.org/10.1140/epjp/s13360-023-04174-z

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