Amos V. Mathias, Jason M. Mkenyeleye, Jefta M. Sunzu
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引用次数: 0
Abstract
The current paper presents a double-layered neutral anisotropic stellar model in general relativistic setting. The model is developed by using Einstein field equations and class I embedding condition. We consider the core with quark matter obeying linear equation of state and envelope layer with gaseous matter admitting Chaplygin gas equation of state. The interior and exterior metric coefficients match smoothly at the interface of core and envelope layers and at the stellar surface. The profiles for matter variables, stability and energy conditions show acceptable trend for physical stellar models. In this model, stellar masses and radii consistent with compact stars HerX-1, 4U1538-52, SAXJ1808.4-3658, CenX-3 and SMCX-1 are generated. We note that studies of multi-layered stars with gaseous envelope and embedding class I condition are missing in investigations conducted in the past.
本文介绍了广义相对论环境下的双层中性各向异性恒星模型。该模型是利用爱因斯坦场方程和 I 类嵌入条件建立的。我们认为核心层的夸克物质遵守线性状态方程，包络层的气态物质遵守查普利金气体状态方程。在核心层和包络层的界面以及恒星表面，内部和外部度量系数平稳匹配。物质变量、稳定性和能量条件的曲线显示出物理恒星模型可以接受的趋势。在这个模型中，产生了与紧凑型恒星 HerX-1、4U1538-52、SAXJ1808.4-3658、CenX-3 和 SMCX-1 一致的恒星质量和半径。我们注意到在过去的研究中缺少对具有气态包膜和嵌入等级 I 条件的多层恒星的研究。
期刊介绍：
New Astronomy publishes articles in all fields of astronomy and astrophysics, with a particular focus on computational astronomy: mathematical and astronomy techniques and methodology, simulations, modelling and numerical results and computational techniques in instrumentation.
New Astronomy includes full length research articles and review articles. The journal covers solar, stellar, galactic and extragalactic astronomy and astrophysics. It reports on original research in all wavelength bands, ranging from radio to gamma-ray.
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