论文标题
银河系的旋转曲线与超流量的暗物质
The Milky Way's rotation curve with superfluid dark matter
论文作者
论文摘要
最近的研究表明，具有超氟阶段的暗物质在其中，声子介导长距离的力会产生现象学上良好的修改后的牛顿动力学（MOND）的规律性。因此，超氟暗物质通过分别结合了粒子暗物质和mond或其相对论完成的益处，成为了天体物理观察的有前途的解释。在这里，我们研究了超级流体的暗物质是否可以以$ r <25 \，\ rm {kpc} $重现观察到的银河系旋转曲线，并能够以肯定的方式回答这个问题。我们的分析表明，超流体暗物质与合理范围中的参数非常适合数据。超流体暗物质和蒙德之间最明显的区别是，超流体暗物质需要约20美元\％$ $减少总的baryonic质量（具有合适的插值功能）。然后，总的baryonic质量为$ 5.96 \ cdot 10^{10} \，m_ \ odot $，其中$ 1.03 \ cdot10^{10} {10} \，m_ \ odot $来自凸起，$ 3.95 \ cdot10^{10}}}}}}}} $ 0.98 \ cdot10^{10} \，m_ \ odot $来自气盘。我们的分析进一步使我们能够估算银河系超流体核心的半径（具体而言，所谓的NFW和热半径）和超氟和正常相中的深色物质总质量。通过改变超氟的边界条件，以给予病毒质量$ m_ {200}^{\ rm {dm}} $在$ 0.5-3.0 \ cdot10^{12} \，m_ \ odot $中$ 65 \，\ rm {kpc} $和$ 73 \，\ rm {kpc} $，而热半径$ r_t $在$ 67 \，\ rm {kpc} $和$ 105 \，$ 105 \，\ rm {kpc} $之间变化。这是对超流体暗物质中非球体对称系统的第一次处理。
Recent studies have shown that dark matter with a superfluid phase in which phonons mediate a long-distance force gives rise to the phenomenologically well-established regularities of Modified Newtonian Dynamics (MOND). Superfluid dark matter, therefore, has emerged as a promising explanation for astrophysical observations by combining the benefits of both particle dark matter and MOND, or its relativistic completions, respectively. We here investigate whether superfluid dark matter can reproduce the observed Milky Way rotation curve for $ R < 25\,\rm{kpc}$ and are able to answer this question in the affirmative. Our analysis demonstrates that superfluid dark matter fits the data well with parameters in reasonable ranges. The most notable difference between superfluid dark matter and MOND is that superfluid dark matter requires about $ 20\% $ less total baryonic mass (with a suitable interpolation function). The total baryonic mass is then $5.96 \cdot 10^{10}\,M_\odot$, of which $1.03\cdot10^{10}\,M_\odot$ are from the bulge, $3.95\cdot10^{10}\,M_\odot$ are from the stellar disk, and $0.98\cdot10^{10}\,M_\odot$ are from the gas disk. Our analysis further allows us to estimate the radius of the Milky Way's superfluid core (concretely, the so-called NFW and thermal radii) and the total mass of dark matter in both the superfluid and the normal phase. By varying the boundary conditions of the superfluid to give virial masses $M_{200}^{\rm{DM}}$ in the range $0.5-3.0\cdot10^{12}\,M_\odot$, we find that the NFW radius $R_{\rm{NFW}}$ varies between $65\,\rm{kpc}$ and $73\,\rm{kpc}$, while the thermal radius $R_T$ varies between about $67\,\rm{kpc}$ and $105\,\rm{kpc}$. This is the first such treatment of a non-spherically-symmetric system in superfluid dark matter.
