论文标题
$ f（r）$重力和大量中微子在暗物质光环的转机半径上的综合效果
Combined Effects of $f(R)$ Gravity and Massive Neutrinos on the Turn-Around Radii of Dark Matter Halos
论文作者
论文摘要
我们提出了一个新的统计数据，基于群集光环的转环半径，以打破$λ$ CDM型号与具有$ f（r）$重力和大量中微子（$ν$）的替代性的黑暗扇区退化，其特征是Fifth Force的强度，$ \ Vert f_ \ vert f_ {r0} $ neutt $ subs $ neutr neutr n Neutr nintin和MOR MOM nindrince，neutr nindin和MOM MOM MOM MOM MOM MOM nindInd。从{\ small dustgrain} - {pathfinder} $ n $ - body模拟为四种不同的宇宙学执行的{\ small dustgrain} - $λ$ cdm（$λ$ cdm（$ \ vert f_ {r0}} f_ {r0} \ vert = 10^{ - 6} $，$m_ν= 0.0 $ eV），fr6+$ 0.06 $ ev（$ \ vert f_ {r0} \ vert = 10^{ - 6} f_ {r0} \ vert = 10^{ - 5} $，$m_ν= 0.15 $ eV），众所周知，它们彼此产生非常相似的常规统计信息。对于每种型号，我们选择那些没有邻居界区域中任何其他较大的晕圈的群集光晕，并在$ z = 0 $的情况下构建其边界区域奇特的速度轮廓。然后，我们确定每个选定的光环的径向距离，在该光环中，边界区域的速度变成等于哈勃流动的衰退速度，因为它绕过半径，并评估了转换半径与病毒式radii与病毒的累积概率分布，$ p（r_ {t}/r_ {v} v} $ p（r_ {t}/r_ {v}）发现FR6和FR5+$ 0.15 $ EV模型之间的退化性很容易被$10σ_{ΔP} $差异$ p（α= 4）$的差异，而$3.2σ_{ΔP} $差额$3.2σ_{ΔP} $差额$λ$ CDM和FR6+CDM和FR6+$ 0.06 $ 0.06 $ EV模型之间的差额是$ $ $ $ p的，还发现，在较高的红移下，这四个模型在$ p（α）$中产生较小的差异。
We present a new statistics based on the turn-around radii of cluster halos to break the dark sector degeneracy between the $Λ$CDM model and the alternative ones with $f(R)$ gravity and massive neutrinos ($ν$) characterized by the strength of the fifth force, $\vert f_{R0}\vert$, and the total neutrino mass, $M_ν$. Analyzing the rockstar halo catalogs at the present epoch from the {\small DUSTGRAIN}-{pathfinder} $N$-body simulations performed for four different cosmologies, namely, $Λ$CDM ($\vert f_{R0}\vert=0$, $M_ν=0.0$eV), fR6 ($\vert f_{R0}\vert=10^{-6}$, $M_ν=0.0$eV), fR6+$0.06$eV ($\vert f_{R0}\vert=10^{-6}$, $M_ν=0.06$eV) and fR5+$0.15$eV ($\vert f_{R0}\vert=10^{-5}$, $M_ν=0.15$eV), which are known to yield very similar conventional statistics to one another. For each model, we select those cluster halos which do not neighbor any other larger halos in their bound zones and construct their bound-zone peculiar velocity profiles at $z=0$. Then, we determine the radial distance of each selected halo at which the bound-zone velocity becomes equal to the recession speed of the Hubble flow as its turn around radius, and evaluate the cumulative probability distribution of the ratios of the turn-around radii to the virial counterparts, $P(r_{t}/r_{v}\ge α)$. The degeneracy between the fR6 and fR5+$0.15$eV models is found to be readily broken by the $10σ_{ΔP}$ difference in the value of $P(α=4)$, while the $3.2σ_{ΔP}$ difference between the $Λ$CDM and fR6+$0.06$eV models is detected in the value of $P(α=8.5)$. It is also found that the four models yield smaller differences in $P(α)$ at higher redshifts.
