论文标题
仔细研究本地，光学选择的，遮盖的塞弗特星系
A hard look at local, optically-selected, obscured Seyfert galaxies
论文作者
论文摘要
我们研究了从CFA Seyfert样品中得出的本地宇宙（$ d \ leq 175 $ 〜mpc）中19个遮盖的，光学选择的Seyfert星系（SY 1.8、1.9和2）样品的X射线光谱。我们的分析是由Nustar在硬X射线中的高灵敏度驱动的，并使用XMM-Newton，Chandra，Sezaku和Swift/XRT加上软X射线光谱。我们还分析了这些来源的光谱，以获得准确的质量估计和爱丁顿的分数。我们采用四个不同的模型来分析这些来源的X射线光谱，这都会产生一致的结果。我们发现，79-90％的源被视线线密度$ n _ {\ rm h}> 10^{23}〜\ rm cm cm^{ - 2} $都大量遮盖了。我们还找到了一个compton-thick（$ n _ {\ rm h}> 10^{24}〜\ rm cm^{ - 2} $）$ 37-53 $％。这些结果与基于多波长分析的先前估计值一致。我们发现，重新加工到固有发射的比例与$ n _ {\ rm H} $正相关，并且与固有的，未吸收的X射线亮度（与伊瓦萨川 - 塔尼古奇效应一致）。我们的结果支持以下假设：辐射压力调节了透明材料的分布。
We study the X-ray spectra of a sample of 19 obscured, optically-selected Seyfert galaxies (Sy 1.8, 1.9 and 2) in the local universe ($d \leq 175$~Mpc), drawn from the CfA Seyfert sample. Our analysis is driven by the high sensitivity of NuSTAR in the hard X-rays, coupled with soft X-ray spectra using XMM-Newton, Chandra, Suzaku, and Swift/XRT. We also analyze the optical spectra of these sources in order to obtain accurate mass estimates and Eddington fractions. We employ four different models to analyze the X-ray spectra of these sources, which all result in consistent results. We find that 79-90 % of the sources are heavily obscured with line-of-sight column density $N_{\rm H} > 10^{23}~\rm cm^{-2}$. We also find a Compton-thick ($N_{\rm H} > 10^{24}~\rm cm^{-2}$) fraction of $37-53$ %. These results are consistent with previous estimates based on multi-wavelength analyses. We find that the fraction of reprocessed to intrinsic emission is positively correlated with $N_{\rm H}$ and negatively correlated with the intrinsic, unabsorbed, X-ray luminosity (in agreement with the Iwasawa-Taniguchi effect). Our results support the hypothesis that radiation pressure regulates the distribution of the circumnuclear material.
