论文标题
弗里德曼宇宙学中扭转的暗物质
Dark matter from torsion in Friedmann cosmology
论文作者
论文摘要
研究了带有扭转的爱因斯坦 - 卡丹框架中的宇宙学模型。对于假定与哈勃膨胀函数成正比的扭转函数，即$ ϕ =-αH$，以两种不同的方法研究了扭转功能作为暗物质组件的贡献。在第一个中，总物质能量密度通过扭转耦合$α$改变，从而产生有效的暗物质和宇宙恒定术语，从而很好地再现了扁平的宇宙一致性模型。在第二种方法中，从仅标准的重磅物质和宇宙学恒定术语开始，可以获得扭转与重子的耦合和宇宙学恒定术语自然会产生暗物质的贡献，从而共同修改了宇宙学术语。在此模型中，暗物质部门可以被解释为扭转功能与普通的重子物质和宇宙常数的有效耦合。最后，结果表明，这两个模型都与超新星和哈勃参数测量的最新宇宙学数据完全兼容。
A cosmological model in an Einstein-Cartan framework endowed with torsion is studied. For a torsion function assumed to be proportional to Hubble expansion function, namely $ϕ=-αH$, the contribution of torsion function as a dark matter component is studied in two different approaches. In the first one, the total matter energy density is altered by torsion coupling $α$, giving rise to an effective dark matter and cosmological constant terms that reproduce quite well the flat cosmic concordance model. In the second approach, starting with just standard baryonic matter plus a cosmological constant term, it is obtained that the coupling of torsion with baryons and cosmological constant term naturally gives rise to a dark matter contribution, together a modified cosmological term. In this model the dark matter sector can be interpreted as an effective coupling of the torsion function with the ordinary baryonic matter and cosmological constant. Finally, it is shown that both models are totally compatible with recent cosmological data from Supernovae and Hubble parameter measurements.
