论文标题
从费米 - 拉特和H.E.S.S. PG 1553+113和PK的观察结果2155-304
The implications of the axion like particle from the Fermi-LAT and H.E.S.S. observations of PG 1553+113 and PKS 2155-304
论文作者
论文摘要
我们研究了高能$γ$ -RARE光谱Pg 1553+113和PKS 2155-304在高能$γ$ -Ray光谱中研究的轴轴，该光谱通过Fermi-lat和H.E.S.S ..的选择。选择促$γ$ rays specyra spectra spectra carlagalactic背景光（ebl）模型的选择，这会影响到apten的效果。对于更喜欢原假设的普通EBL模型，我们将ALP-Photon耦合常数的约束设置为95％C.L. AS $ g_ {aγ} \ Lessim 5 \ times 10^{ - 11}〜\ rm {gev}^{ - 1} $ for Alp Mass $ \ sim 10 $ nev。我们还考虑了对宇宙红外辐射的Ciber观察，该辐射在前景缩写后的波浪波长$ \ sim 1〜μm。高红移的高能量伽玛射线将遭受由于这种过量而引起的更大的衰减效果。在这种情况下，我们发现ALP-PHOTON振荡将改善与PKS 2155-304和PG 1553+113的观察到的光谱的拟合，并在95％C.L中找到一个有利的参数区域。
We investigate the axion like particle (ALP)-photon oscillation effect in the high energy $γ$-ray spectra of PG 1553+113 and PKS 2155-304 measured by Fermi-LAT and H.E.S.S.. The choice of extragalactic background light (EBL) model, which induces the attenuate effect in observed $γ$-ray spectra, would affect the ALP implication. For the ordinary EBL model that prefers a null hypothesis, we set constraint on the ALP-photon coupling constant at 95% C.L. as $g_{aγ}\lesssim 5\times 10^{-11} ~\rm{GeV}^{-1}$ for the ALP mass $\sim 10$ neV. We also consider the CIBER observation of the cosmic infrared radiation, which shows an excess at the wave wavelength of $\sim 1~μ$m after the substraction of foregrounds. The high energy gamma-rays from extragalactic sources at high redshifts would suffer from a more significant attenuate effect caused by this excess. In this case, we find that the ALP-photon oscillation would improve the fit to the observed spectra of PKS 2155-304 and PG 1553+113 and find a favored parameter region at 95% C.L..
