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arXiv 2211.00524hep-phastro-ph.HE
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活动星系核红移不确定下轴子对伽马射线谱不规则性的影响

Axion effects on gamma-ray spectral irregularities with AGN redshift uncertainty

Hai-Jun Li, Wei Chao

AI总结:

本文利用红移不确定的活动星系核VER J0521+211的多状态TeV伽马射线谱,研究光子-ALP振荡效应并给出ALP参数空间的联合约束,同时检验EBL吸收和红移不确定性对约束结果的影响。

摘要:

我们研究了光子-类轴子粒子(ALP)振荡对红移不确定的活动星系核(AGN)VER J0521+211 的 TeV 伽马射线谱不规则性的影响。伽马射线谱由 Fermi-LAT 和 VERITAS 在 2013 年和 2014 年的三个通量状态下测量得到。我们利用这些状态对 ALP 参数($m_a, g_{aγ}$)空间设置了联合约束,并在红移极限情景 $z_0\sim\mathcal{O}(0.1-0.3)$ 下检验了河外背景光(EBL)吸收对 ALP 约束的影响。由 VER J0521+211 设置的 99% 置信水平($\rm C.L.$)光子-ALP 联合约束大致为:对于 $1.0\times10^{-9} \\, {\rm eV} \lesssim m_a \lesssim 1.0\times10^{-7} \\, {\rm eV}$,有 $g_{aγ} \gtrsim 2.0\times 10^{-11} \rm \\, GeV^{-1}$。我们发现红移极限情景与光子-ALP 约束之间没有明确的关联。低估和高估的红移都会影响约束结果。

英文摘要:

We investigate the photon-axionlike particle (ALP) oscillation effects on TeV gamma-ray spectral irregularities from the uncertain redshift active galactic nuclei (AGN) VER J0521+211. The gamma-ray spectra are measured by Fermi-LAT and VERITAS with the three flux states in 2013 and 2014. We set the combined constraints on the ALP parameter ($m_a, g_{aγ}$) space with these states and test the extragalactic background light (EBL) absorption effect on ALP constraints with the redshift limit scenarios $z_0\sim\mathcal{O}(0.1-0.3)$. The 99% $\rm C.L.$ photon-ALP combined constraints set by VER J0521+211 are roughly at $g_{aγ} \gtrsim 2.0\times 10^{-11} \rm \, GeV^{-1}$ for $1.0\times10^{-9} \, {\rm eV} \lesssim m_a \lesssim 1.0\times10^{-7} \, {\rm eV}$. We find no clear connection between the redshift limit scenarios and the photon-ALP constraints. Both the underestimated and overestimated redshifts can affect the constraint results.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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