SUZAKU VIEW OF THE SWIFT/BAT ACTIVE GALACTIC NUCLEI. IV. NATURE OF TWO NARROW-LINE RADIO GALAXIES (3C 403 AND IC 5063)
SUZAKU VIEW OF THE SWIFT/BAT ACTIVE GALACTIC NUCLEI. IV. NATURE OF TWO NARROW-LINE RADIO GALAXIES (3C 403 AND IC 5063)
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DOI：
10.1088/0004-637x/738/1/70
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发表时间：
2011-06
期刊：
影响因子：
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通讯作者：
F. Tazaki;Y. Ueda;Y. Terashima;R. Mushotzky
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文献类型：
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作者：
F. Tazaki;Y. Ueda;Y. Terashima;R. Mushotzky
我们报告了对两个窄线射电星系3C 403和IC 5063的Suzaku宽带x射线观测结果。结合Swift/Burst Alert Telescope （BAT）平均58个月的光谱，我们能够准确地限制它们在0.5 - 200kev波段的光谱特性。两个原子核的光谱都有一个吸收的截止幂律，一个来自冷物质的有铁- k发射线的吸收反射分量和一个未吸收的软分量，这给散射发射提供了一个确定的上限。两个目标的反射强度归一化到平均BAT通量为R≡Ω/2π≈0.6，这意味着它们的环面具有足够大的立体角来产生再处理的发射。打开角为~ 50°的数值环面模型可以很好地再现观测到的光谱。我们讨论了与塞弗特星系相比，射电星系中引起汤姆逊散射的正常气体的数量系统地较小的可能性。
We report the results of Suzaku broadband X-ray observations of the two narrow-line radio galaxies, 3C 403 and IC 5063. Combined with the Swift/Burst Alert Telescope (BAT) spectra averaged for 58 months, we are able to accurately constrain their spectral properties over the 0.5–200 keV band. The spectra of both nuclei are well represented with an absorbed cutoff power law, an absorbed reflection component from cold matter with an iron–K emission line, and an unabsorbed soft component, which gives a firm upper limit for the scattered emission. The reflection strength normalized to the averaged BAT flux is R ≡ Ω/2π ≈ 0.6 in both targets, implying that their tori have a sufficiently large solid angle to produce the reprocessed emission. A numerical torus model with an opening angle of ∼50° well reproduces the observed spectra. We discuss the possibility that the amount of the normal gas responsible for Thomson scattering is systematically smaller in radio galaxies compared with Seyfert galaxies.