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arXiv 1506.04547astro-ph.HE
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极窄线Seyfert 1星系1H 0707-495的质量和自旋及其对触发相对论喷流的意义

The Mass and Spin of The Extreme Narrow Line Seyfert 1 Galaxy 1H 0707-495 and Its Implications for The Trigger for Relativistic Jets

Chris Done, Chichuan Jin

摘要:

“复杂的”窄线塞弗特1(NLS 1)1H 0707-495的X射线光谱的相对论反射模型需要一个高自旋、中等倾角、低质量的黑洞。在这些参数固定的情况下,观测到的光学/紫外辐射直接决定了通过外盘的质量吸积速率,从而预测了热光度。这是$140-260~\times$爱丁顿极限。这样一个圆盘应该能产生强风,而风一般都是clusivelous的。改变相对于cluperous风结构的倾角,可以解释“复杂”NLS 1(如1H 0707-495)和“简单”NLS(如PG 1244+026)之间令人费解的差异。拦截风的视线在铁上显示出来自风的热相的深吸收特征,以及当团块隐藏X射线源时的随机下降和复杂吸收(复杂NLS 1),而这两个特征对于更多的正面倾斜都不存在(简单NLS 1)。这种几何形状与相对论反射模型中自旋测量所假设的平盘的清晰视图完全不同,因此即使是1H 0707-495也可能具有低自旋。如果是这样的话,这就重新开启了一个最简单的、因此也是非常有吸引力的可能性,即高黑洞自旋是触发高相对论性(体洛伦兹因子$\sim 10-15$)喷流的充分必要条件。

英文摘要:

Relativistic reflection models of the X-ray spectrum of the `complex' Narrow Line Seyfert 1 (NLS1) 1H 0707-495 require a high spin, moderate inclination, low mass black hole. With these parameters fixed, the observed optical/UV emission directly determines the mass accretion rate through the outer disc and hence predicts the bolometric luminosity. This is $140-260~\times$ the Eddington limit. Such a disc should power a strong wind, and winds are generically expected to be clumpy. Changing inclination angle with respect to a clumpy wind structure gives a possible explanation for the otherwise puzzling difference between `complex' NLS1 such as 1H 0707-495 and `simple' ones like PG 1244+026. Lines of sight which intercept the wind show deep absorption features at iron from the hot phase of the wind, together with stochastic dips and complex absorption when the clumps occult the X-ray source (complex NLS1), whereas both these features are absent for more face-on inclination (simple NLS1). This geometry is quite different to the clean view of a flat disc which is assumed for the spin measurements in relativistic reflection models, so it is possible that even 1H 0707-495 has low spin. If so, this re-opens the simplest and hence very attractive possibility that high black hole spin is a necessary and sufficient condition to trigger highly relativistic (bulk Lorentz factor $\sim 10-15$) jets.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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