Axion production in pulsar magnetosphere gaps
Axion production in pulsar magnetosphere gaps
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DOI：
10.1103/physrevd.104.055038
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发表时间：
2021-04
影响因子：
5
通讯作者：
A. Prabhu
中科院分区：
文献类型：
--
作者：
A. Prabhu
脉冲星磁层存在非定常真空隙，其特征是E · B不为零。真空间隙在等离子体产生和电磁波发射中起着重要的作用。我们表明，这些差距产生的轴子的能量是由差距振荡频率。在间隙中产生的轴子密度可以比周围的暗物质密度大几个数量级。在强脉冲星磁场中，这些轴子的一小部分可能转化为光子，产生宽带无线电信号。我们表明，用射电望远镜（FAST）和干涉仪（SKA）对附近的恒星进行专门的观测，可以探测比当前天体物理界低几个数量级的轴子-光子耦合。
Pulsar magnetospheres admit non-stationary vacuum gaps that are characterized by non-vanishing E · B. The vacuum gaps play an important role in plasma production and electromagnetic wave emission. We show that these gaps generate axions whose energy is set by the gap oscillation frequency. The density of axions produced in a gap can be several orders of magnitude greater than the ambient dark matter density. In the strong pulsar magnetic field, a fraction of these axions may convert to photons, giving rise to broadband radio signals. We show that dedicated observations of nearby pulsars with radio telescopes (FAST) and interferometers (SKA) can probe axion-photon couplings that are a few orders of magnitude lower than current astrophysical bounds.