An accretion disc origin for the 'X-ray broad-line region' in 1H0707-495
An accretion disc origin for the 'X-ray broad-line region' in 1H0707-495
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1H0707-495 中“X 射线宽线区域”的吸积盘起源
DOI：
10.1111/j.1745-3933.2009.00746.x
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发表时间：
2009
期刊：
影响因子：
--
通讯作者：
Blustin A
中科院分区：
文献类型：
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作者：
Blustin A
我们利用380 ksx射线多镜任务-牛顿（XMM-Newton）高分辨率反射光栅光谱仪（RGS）光谱，寻找1H0707-495核环境的窄光谱特征。我们没有发现任何视距电离风（热吸收器）的证据。然而，我们确实检测到宽~ 5000 km−1的宽发射线，与oviilyα， NviiLyα， CviLyα和Fexix/Fexx/NeixHeα混合相一致。有趣的是，这些谱线同时具有蓝移和红移的成分，它们的速度变化与吸积盘在距离黑洞约1600rg处的起源一致。这些特征可以解释为圆盘反射光谱的窄线核心，从而为1H0707-495 x射线光谱的斜向解释提供了独立的支持。我们讨论了我们的发现与其他塞弗茨的“x射线宽线区域”的相关性，以及光学宽线区域本身的起源。
We use a 380-ksX-ray Multi-Mirror Mission–Newton(XMM–Newton) high-resolution Reflection Grating Spectrometer (RGS) spectrum to look for narrow spectral features from the nuclear environment of 1H0707-495. We do not find any evidence of a line-of-sight ionized wind (warm absorber). We do, however, detect broad emission lines, of width ∼5000 kms−1, consistent with OviiiLyα, NviiLyα, CviLyα and an Fexix/Fexx/NeixHeα blend. Intriguingly, these lines have both blueshifted and redshifted components, whose velocity shifts are consistent with an origin in an accretion disc at ∼1600Rgfrom the black hole. The features can be interpreted as the narrow-line cores of the disc reflection spectrum, thus providing independent support for the discline interpretation of the X-ray spectrum of 1H0707-495. We discuss the relevance of our findings for the ‘X-ray broad-line region’ in other Seyferts, and for the origins of the optical broad-line region itself.