Dark energy stars in the context of black holes - The physical profiles

• Main Authors: Azman, Muhamad Ashraf, Yusof, Norhasliza, Abu Kassim, Hasan, Marcos, Juan Carlos Algaba
• Format: Article
• Published: World Scientific Publishing 2024
• Subjects: QC Physics
• Online Access: http://eprints.um.edu.my/45320/; https://doi.org/10.1142/S0217732324500433
• Institution: Universiti Malaya

The dark energy star is a hypothetical model proposed as an alternative to address problems related to the structure of black holes (BHs), such as the presence of singularities. While dark energy star models have been previously explored, their application to BHs remains unexplored. This paper aims to investigate the concept of dark energy stars and compare their properties to BHs. The primary objective is to explore the physical profiles of dark energy stars and evaluate their similarity to the physical properties of BHs described by the Schwarzschild solution. To achieve this, specific properties of the dark energy star models need to be satisfied in the context of BHs, and their physical profiles are studied. The metric function grr proposed by M. R. Finch and J. E. F. Skea Class. Quantum Grav. 6, 467 (1989)], as adopted by A. Banerjee, M. K. Jasim and A. Pradhan Mod. Phys. Lett. A 35, 2050071 (2020), arXiv:1911.09546 gr-qc]], is used and parametrized, making it close to BH spacetimes. The findings show that the model exhibits properties similar to BHs in terms of the stellar radius, compactness, surface redshift, and nature of gravity. Specifically, the dark energy star model behaves like BHs with a dark energy parameter omega=-1/3, satisfying all energy conditions. However, it should be noted that the investigation is limited to static spherically symmetric cases and further studies are required to explore the model in rotating cases. Overall, this study sheds light on the potential of dark energy star models in explaining BH properties and presents promising avenues for further research in understanding the nature of BHs and dark energy.