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Core–envelope model of an anisotropic strange star with density-dependent bag (B) parameter

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Abstract

Making use of a particular solution for a class of relativistic compact stars, we develop a core–envelope model where the core region is assumed to be composed of strange matter admitting an equation of state \(p=\frac{1}{3}(\rho -4B)\). In our model, we assume the bag parameter B of the MIT bag model to be density-dependent. For an anisotropic stellar configuration with two separate regions—the quark core-enveloped by baryonic matter—we analyse the effects of density and anisotropy on the bag value. Moreover, the effects of the background geometry of the configuration are studied. The physical features of the model are investigated.

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Acknowledgements

BD and KBG are thankful to CSIR for providing fellowships vide No: 09/1219 (0005)/2019 EMR-I and 09/1219(0004)/2019 EMR-I, respectively. RS gratefully acknowledges support from the IUCAA, Pune, India, under its Visiting Research Associateship Programme.

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Authors and Affiliations

  1. Department of Physics, Coochbehar Panchanan Barma University, Vivekananda Street, Coochbehar, West Bengal, 736101, India

    B. Das, K. B. Goswami, P. K. Chattopadhyay & R. Sharma

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  1. B. Das
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  2. K. B. Goswami
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  3. P. K. Chattopadhyay
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  4. R. Sharma
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Correspondence to P. K. Chattopadhyay.

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Das, B., Goswami, K.B., Chattopadhyay, P.K. et al. Core–envelope model of an anisotropic strange star with density-dependent bag (B) parameter. Indian J Phys 97, 2273–2287 (2023). https://doi.org/10.1007/s12648-023-02586-2

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