Detecting axion dark matter through the radio signal from Omega Centauri

Detecting axion dark matter through the radio signal from Omega Centauri
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通过半人马座欧米茄的无线电信号探测轴子暗物质

DOI:
10.1103/physrevd.104.103015
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发表时间:
2021-08
期刊:
影响因子:
5
通讯作者:
Yin Peng-Fei
Yin Peng-Fei
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Wang Jin-Wei;Bi Xiao-Jun;Yin Peng-Fei

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作为一种动机良好的暗物质候选者,轴子可以通过磁白矮星或中子星磁层中的轴子-光子共振转换来探测。在这项工作中,我们利用半人马座欧米茄星系团,它是银河系中最大的球状星系团,被认为是矮小星系的残余核心,通过来自其中所有中子星和磁性白矮星的无线电信号来探测轴子暗物质。经过100小时的观测,SKA第一阶段和LOFAR相结合,可以有效探测轴子质量范围为0.1\sim 30~\u\Text{ev}$的轴子-光子耦合参数空间,最高可达$10^-14}\sim 10^-15}~\text{gev}^-1}$。根据中子星演化模型的选择,这一极限比单个中子星或磁白矮星高出两个或三个半数量级。
As a well-motivated dark matter candidate, axions can be detected through the axion-photon resonant conversion in the magnetospheres of magnetic white dwarf stars or neutron stars. In this work, we utilize Omega Centauri, which is the largest globular cluster in the Milky Way and is suggested to be the remnant core of a dwarf galaxy, to probe the axion dark matter through radio signals that originate from all the neutron stars and magnetic white dwarf stars in it. With 100 hours of observation, the combination of SKA phase 1 and LOFAR can effectively probe the parameter space of the axion-photon coupling $g_{a\gamma}$ up to $10^{-14}\sim 10^{-15}~\text{GeV}^{-1}$ for the axion mass range of $0.1\sim 30 ~\mu\text{eV}$. Depending on the choice of neutron star evolution model, this limitation is two or three and a half orders of magnitude higher than that of the single neutron star or magnetic white dwarf.
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