非均匀模型中暗晕的标量场

IF 1.8 4区物理与天体物理 Q3 ASTRONOMY & ASTROPHYSICS

Astrophysics and Space Science Pub Date : 2025-07-02 DOI:10.1007/s10509-025-04449-0

Mohammad Rahim Bordbar, Mojtaba Amirmojahedi

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引用次数: 0

摘要

利用各向同性、球对称但非均匀的Szekeres-Szafron度规，提出了一个星系周围球形暗晕的模型。通过考虑具有二阶势的标量场作为能量-动量张量的来源，我们已经证明了小尺度上的能量密度可以为星系（或星系团）附近暗物质的存在提供解释。换句话说，这个模型可以证明在远离星系中心的距离上旋转曲线变平是合理的。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Scalar field of dark halos in an inhomogeneous model

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Scalar field of dark halos in an inhomogeneous model

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.

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来源期刊

Astrophysics and Space Science 地学天文-天文与天体物理

CiteScore

3.40

自引率

5.30%

发文量

106

审稿时长

2-4 weeks

期刊介绍： Astrophysics and Space Science publishes original contributions and invited reviews covering the entire range of astronomy, astrophysics, astrophysical cosmology, planetary and space science and the astrophysical aspects of astrobiology. This includes both observational and theoretical research, the techniques of astronomical instrumentation and data analysis and astronomical space instrumentation. We particularly welcome papers in the general fields of high-energy astrophysics, astrophysical and astrochemical studies of the interstellar medium including star formation, planetary astrophysics, the formation and evolution of galaxies and the evolution of large scale structure in the Universe. Papers in mathematical physics or in general relativity which do not establish clear astrophysical applications will no longer be considered. The journal also publishes topically selected special issues in research fields of particular scientific interest. These consist of both invited reviews and original research papers. Conference proceedings will not be considered. All papers published in the journal are subject to thorough and strict peer-reviewing. Astrophysics and Space Science features short publication times after acceptance and colour printing free of charge.