论文标题
通过Fermi-Lat伽马射线观察NGC1275重新访问轴突样颗粒的分析
Revisiting the analysis of axion-like particles with the Fermi-LAT gamma-ray observation of NGC1275
论文作者
论文摘要
在这项工作中，我们重新分析了NGC 1275的Fermi-Lat观察结果以搜索轴突样粒子（ALP）效应并限制ALP参数。我们没有将观察到的光谱与ALP模型拟合，而是采用另一种方法来分析该来源，该方法计算频谱的不规则性。使用新使用的方法，我们没有发现NGC 1275的光谱振荡，并排除耦合$ g_ {aγ}> 3 \ 3 \ times10^{ - 12} \，{\ rm gev^{ - 1}} $在95 \ sim prusit的$ 1 nev abous $ 1 nev左右的Alp质量左右。我们还表明，通过组合PKS 2155-304的观察可以进一步改善限制。我们建议，考虑到更多的来源，我们可以获得更广泛的排除区域。
In this work, we re-analyze the Fermi-LAT observation of NGC 1275 to search for axion-like particle (ALP) effects and constrain ALP parameters. Instead of fitting the observed spectrum with ALP models, we adopt an alternative method for the analysis of this source which calculates the irregularity of the spectrum. With the newly used method, we find no spectral oscillation for the NGC 1275 and rule out couplings $g_{aγ}>3\times10^{-12}\,{\rm GeV^{-1}}$ around ALP mass of $m_a\sim$ 1 neV at 95\% confidence level, which is more stringent than the previous results. We also show that the constraints can be further improved by combining the observation of PKS 2155-304. We suggest that with more sources taken into account, we could obtain a much wider exclusion region.
