论文标题
基于Nustar和Swift/BAT数据的MRK 417中的核遮挡结构
Nuclear obscuration structure in Mrk 417 based on NuSTAR and Swift/BAT data
论文作者
论文摘要
我们介绍了Nustar（3-60 KEV）和Swift/BAT（14-150）观察者观察到的Seyfert 2类Galaxy MRK 417的X射线光谱分析的结果。 NUSTAR数据与基线模型显示出良好的拟合度，该模型由吸收的截止幂律分量组成，并反映了冷中性培养基的发射。我们发现，频谱陡峭$γ= 1.63 _ { - 0.11}^{+0.10} $，并由氢柱密度$ n_ {h} = 3.22 _ {-0.39}^{+0.41} {+0.41} \ cdot 10^{23} cm^{-223} cm^{ - 2} cm^{-239}^{-239} $ = 115 _ { - 1}^{+2} $ eV，该功能起源于中等密度。在将NUSTAR数据与Swift/BAT频谱相结合时，我们还使用复杂的物理模型mytorus和bntorus应用了一种更具身体动机的方法。对于第一种情况，$γ_{mytorus} = 1.68 _ { - 0.09}^{+0.09} $的光子索引和吸收线$ n_ {h，l.o.s} = 3.36 = 3.36 _ { - 0.07}^{ - 0.07}^{+0.07}^{+0.07}^{+0.07}^{+0.07}^{+0.07}^{+0.07}^{+0.07}^{+0.07}^{+0.07}^{23 cm^{ - 2} $。应用Bntorus模型显示了光子索引$γ_{bntorus} = 1.75 _ { - 0.09}^{+0.09} $和吸收$ n_ {根据结果，我们获得了估计气盘圆环覆盖因子$ f_ {c} = 0.29-0.34 $，以及2-10 KEV中的内在X射线光度，约为$ \ 3.16 \ cdot 10^{43} $ erg/s。对中红外（MIR）观测数据的进一步分析表明，覆盖因子甚至可能较小$ f_ {c} \大约0.12 $。我们的结果使我们能够暗示MRK 417的掩盖材料最好具有环状几何形状。
We present the results of X-ray spectral analysis of the Seyfert type 2 galaxy Mrk 417 observed by the NuSTAR (3-60 keV) and the Swift/BAT (14-150) observatories. The NuSTAR data shows a good fit with a baseline model which composed of an absorbed cutoff power-law component and reflected emission from the cold neutral medium. We found that the spectrum is steep $Γ= 1.63_{-0.11}^{+0.10}$ and obscured by hydrogen column density of $N_{H} = 3.22_{-0.39}^{+0.41} \cdot 10^{23} cm^{-2}$, narrow $FeK_α$ emission line has an equivalent width of $EW = 115_{-1}^{+2}$ eV that suggests this feature is originated in a moderate density of obscurer. In combining NuSTAR data with Swift/BAT spectrum we also applied a more physically motivated approach using complex physical models MYTorus and BNTorus. For the first case the photon index of $Γ_{MYTorus} = 1.68_{-0.09}^{+0.09}$ and the line-of-sight column density of the absorber $N_{H,l.o.s} = 3.36_{-0.07}^{+0.04} \cdot 10^{23} cm^{-2}$. Applying BNTorus model shows the photon index $Γ_{BNTorus} = 1.75_{-0.09}^{+0.09}$ and absorption $N_{H,l.o.s} = 3.72_{-0.39}^{+0.49} \cdot 10^{23} cm^{-2}$. Based on the results we get an estimation of gas-dust torus covering factor $f_{c} = 0.29-0.34$ and an intrinsic X-ray luminosity in 2-10 keV of $\approx 3.16\cdot 10^{43}$ erg/s. Further analysis of Mid-Infrared (MIR) observational data, indicates that the covering factor maybe even smaller $f_{c} \approx 0.12$. Our results allow us to suggest that obscuring material of Mrk 417 has preferably a ring-like geometry.
