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arXiv 1509.03030astro-ph.HE
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在红移$\sim1$上识别一个新的$γ$射线发射窄线塞弗特1星系

Identification of a New $γ$-ray-emitting narrow-line Seyfert 1 Galaxy, at Redshift $\sim1$

Su Yao, Weimin Yuan, Hongyan Zhou, S. Komossa, Jin Zhang, Erlin Qiao, Bifang Liu

摘要:

我们报告的一个新的$γ$射线发射窄线塞弗特1(NLS 1)星系,SDSS J122222.55+041315.7,这增加了已知的数量,这种显着的,但罕见的活动星系核(AGN)类型的对象。它的光谱,在斯隆数字巡天重子振荡光谱巡天,揭示了一个宽H $β$发射线的宽度(FWHM)为1734 $\pm$ 104 km s $^{-1}$。这与强光学Fe II多重态[ $R_{4570}=0.9$ ]和弱[O III] $λ5007$发射线一起,使该物体成为典型的NLS 1。另一方面,源表现出高的无线电亮度温度,快速的红外变化,和平坦的X射线光谱延伸到$\sim$ 200千电子伏。它与一个发光的$γ$ -射线源有关,用{ \it Fermi}/LAT显著检测到。与其他波段相关的可变性尚未得到测试。单区轻子喷流模型可以很好地模拟谱能量分布。这个新成员是迄今为止距离最远的$γ$射线发射NLS 1,红移为$z=0.966$。

英文摘要:

We report on the identification of a new $γ$-ray-emitting narrow-line Seyfert 1 (NLS1) galaxy, SDSS J122222.55+041315.7, which increases the number of known objects of this remarkable but rare type of active galactic nuclei (AGN) to seven. Its optical spectrum, obtained in the Sloan Digital Sky Survey-Baryon Oscillation Spectroscopic Survey, reveals a broad H $β$ emission line with a width (FWHM) of 1734$\pm$104 km s$^{-1}$. This, along with strong optical Fe II multiplets [$R_{4570}=0.9$] and a weak [O III] $λ5007$ emission line, makes the object a typical NLS1. On the other hand, the source exhibits a high radio brightness temperature, rapid infrared variability, and a flat X-ray spectrum extending up to $\sim$200 keV. It is associated with a luminous $γ$-ray source detected significantly with {\it Fermi}/LAT. Correlated variability with other wavebands has not yet been tested. The spectral energy distribution can be well modelled by a one-zone leptonic jet model. This new member is by far the most distant $γ$-ray-emitting NLS1, at a redshift of $z=0.966$.

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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