https://doi.org/10.1140/epjc/s10052-020-08799-7
Regular Article – Theoretical Physics
Stability and improved physical characteristics of relativistic compact objects arising from the quadratic term in 
1
Department of Mathematics, Faculty of Science, Eastern University, Vantharumoolai, 30350, Chenkalady, Sri Lanka
2
Department of Mathematics, Faculty of Applied Sciences, Durban University of Technology, 4000, Durban, South Africa
Received:
13
November
2020
Accepted:
23
December
2020
Published online:
21
January
2021
We investigate the stability and enhancement of the physical characteristics of compact, relativistic objects which follow a quadratic equation of state. To achieve this, we make use of the Vaidya–Tikekar metric potential. This gravitational potential has been shown to be suitable for describing superdense stellar objects. Pressure anisotropy is also a key feature of our model and is shown to play an important role in maintaining stability. Our results show that the combination of the Vaidya–Tikekar gravitational potential used together with the quadratic equation of state provide models which are favourable. In comparison with other equations of state, we have shown that the quadratic equation of state mimics the colour-flavour-locked equation of state more closely than the linear equation of state.
© The Author(s) 2021
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