arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2006.06306astro-ph.COastro-ph.GAgr-qc
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重子物质引力场中的轴子暗物质晕

Axionic Dark Matter Halos in the Gravitational Field of Baryonic Matter

Gennady Berman, Vyacheslav Gorshkov, Vladimir Tsifrinovich

摘要:

我们把球形星系的暗物质晕看作是超轻轴子与重子物质相互作用的玻色-爱因斯坦凝聚体。在平均场极限下,我们导出了DMH分量的球对称波函数的Hartree-Fock型积分微分方程。该方程包括两个独立的无量纲参数:(i)\b{eta} -重子和轴子总质量的比值;(ii)α-特征重子和轴子空间参数的比值。我们推广了耗散算法,数值研究了重子分量产生的引力场中轴子晕的基态。我们计算了DMH的特征尺寸,Xc,作为\b{eta}的函数,并得到了Xc的解析近似。

英文摘要:

We consider a dark matter halo (DMH) of a spherical galaxy as a Bose-Einstein condensate of the ultra-light axions interacting with the baryonic matter. In the mean-field limit, we have derived the integro-differential equation of the Hartree-Fock type for the spherically symmetrical wave function of the DMH component. This equation includes two independent dimensionless parameters: (i) \b{eta}- the ratio of baryon and axion total mases and (ii) ξ- the ratio of characteristic baryon and axion spatial parameters. We extended our dissipation algorithm for studying numerically the ground state of the axion halo in the gravitational field produced by the baryonic component. We calculated the characteristic size, Xc, of DMH as a function of \b{eta} and ξ and obtained an analytical approximation for Xc.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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