论文标题
狭窄的seyfert 1星系中的对数 - 促销光谱模型的高能量和非常高的限制
High-energy and Very High-energy Constraints from Log-parabolic Spectral Models in Narrow-line Seyfert 1 Galaxies
论文作者
论文摘要
窄线Seyfert 1星系（NLSY1S）是一类良好的$γ$ - 射线来源，显示出像更常见的平面光谱无线电类星体一样存在喷气机。 $γ$ - 雷排放的证据提出了$γ$ - 射线发射区的位置以及$γ$ - $γ$吸收范围内（BLR）的贡献，因为Fermi-lat在MEV-GEV能量范围内检测到了此类对象，但不是通过Imageing Attryeric chereenkov Telessessesecopsesseric cherenkov telessessessevev telescopsessesseric范围内检测到。我们讨论了三个NLSY1（SBS 0846+513，PMN J0948+0022和PKS 1502+036）的光谱特性如何衍生自Fermi大面积望远镜第四源目录（4FGL）与基于理论模型相比，基于理论模型。特别是，我们专注于一个问题，即简单的幂律光谱模型如何通过当前的Fermi-LAT或将来的Imaging Altiberic Altiberic Alterionic Cherenkov望远镜数据将$γ$ -RARE窄线Seyfert 1个星系置于1个星系中。我们发现，对数 - 促销模型模仿$ e \ sim \ sim 100 $ GEV中的幂律模型的唯一可能性是具有很小的曲率参数$β\ sim 0.05 $的值。
Narrow-line Seyfert 1 galaxies (NLSy1s) are a well-established class of $γ$-ray sources, showing the presence of a jet like the more common flat-spectrum radio quasars. The evidence of $γ$-ray emission poses the issue of the location of the $γ$-ray emitting zone and of the contribution of the $γ$-$γ$ absorption within the broad-line region (BLR), since such objects have been detected by Fermi-LAT in the MeV-GeV energy range but not by imaging atmospheric Cherenkov telescopes beyond 100 GeV. We discuss how the spectral properties of three NLSy1s (SBS 0846+513, PMN J0948+0022, and PKS 1502+036) derived from the Fermi Large Area Telescope Fourth Source Catalog (4FGL) compare with theoretical models based on the observed properties of the BLR. In particular, we focus on the question on how simple power-law spectral models and log-parabolic ones could be disentangled in $γ$-ray narrow-line Seyfert 1 galaxies by means of current Fermi-LAT or future imaging atmospheric Cherenkov telescopes data. We find that the only possibility for a log-parabolic model to mimic a power-law model in the energy band above $E \sim 100$ GeV is to have a very small value of the curvature parameter $ β\sim 0.05$.
