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<p>Using the isotropic and spherically symmetric but inhomogeneous Szekeres–Szafron metric, a model for the spherical dark halo around galaxies has been presented. By considering a scalar field with a second-order potential as the source of energy-momentum tensor, we have demonstrated that the energy density on small scales can provide an explanation for dark matter presence in proximity to galaxies (or galaxy clusters). In other words, this model can justify the flattening of the rotation curves at distances far from the center of the galaxy.</p>

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Scalar field of dark halos in an inhomogeneous model

  • 期刊论文

  • 发表日期：

    2025年7月2日

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  • Mohammad Rahim Bordbar,
  • Mojtaba Amirmojahedi

摘要

Using the isotropic and spherically symmetric but inhomogeneous Szekeres–Szafron metric, a model for the spherical dark halo around galaxies has been presented. By considering a scalar field with a second-order potential as the source of energy-momentum tensor, we have demonstrated that the energy density on small scales can provide an explanation for dark matter presence in proximity to galaxies (or galaxy clusters). In other words, this model can justify the flattening of the rotation curves at distances far from the center of the galaxy.