arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 2109.02573astro-ph.GAastro-ph.HE
收藏

IRAS 04416+1215附近超爱丁顿吸积活动星系核的极端性质

The extreme properties of the nearby hyper-Eddington accreting Active Galactic Nucleus in IRAS 04416+1215

Alessia Tortosa, Claudio Ricci, Francesco Tombesi, Luis C. Ho, Pu Du, Kohei Inayoshi, Jian-Min Wang, Jinyi Shangguan, Ruancun Li

摘要:

在以极端爱丁顿速率吸积的超大质量黑洞中,吸积流和X射线发射等离子体的物理性质仍然非常不清楚。在这里,我们提出了对2020年进行的超爱丁顿塞弗特1星系IRAS 04416+1215的同时XMM-牛顿和NuSTAR观测的分析。这些观测的主要目标是研究X射线日冕的性质,以及吸积流和环核环境的结构,在这个制度的极端吸积。IRAS 04416+1215是本宇宙中爱丁顿比($λ_{\rm Edd}\simeq 472$)最高的星系之一。它显示了一个有趣的光谱形状,与标准窄线塞弗特1星系的光谱非常相似,存在由三个阶段组成的多相吸收结构,其最小和最大距离的估计表明了两种不同的解释,一种与三个X射线风是同空间的一致,并且可能由磁流体动力学过程驱动,另一个与多相风也是多尺度的相一致。IRAS 04416+1215的X射线光谱也有一个突出的软过剩分量和一个由反射分量主导的硬X射线发射。此外,我们详细的光谱分析表明,IRAS 04416+1215具有NuSTAR迄今为止测量的最低日冕温度($kT_e=3-22$ keV,取决于模型)。这与混合日冕等离子体是一致的,在混合日冕等离子体中,由于非热电子的能量分布的高能量尾部,主要的连续发射由对产生驱动。

英文摘要:

The physical properties of the accretion flow and of the X-ray emitting plasma, in supermassive black holes accreting at extreme Eddington rates, are still very unclear. Here we present the analysis of simultaneous XMM-Newton and NuSTAR observations of the hyper-Eddington Seyfert 1 galaxy IRAS 04416+1215, carried out in 2020. The main goal of these observations is to investigate the properties of the X-ray corona, as well as the structure of the accretion flow and of the circumnuclear environment, in this regime of extreme accretion. IRAS 04416+1215 has one of the highest Eddington ratio ($λ_{\rm Edd}\simeq 472$) in the local Universe. It shows an interesting spectral shape, very similar to the standard Narrow Line Seyfert 1 galaxy's spectra, with the presence of multi-phase absorption structure composed of three phases, whose estimate of the minimum and maximum distances suggests two different interpretations, one consistent with the three X-ray winds being co-spatial, and possibly driven by magnetohydrodynamical processes, the other consistent with the multi-phase winds being also multi-scale. The X-ray spectrum of IRAS 04416+1215 also has a prominent soft excess component and a hard X-ray emission dominated by a reflection component. Moreover, our detailed spectral analysis shows that IRAS 04416+1215 has the lowest coronal temperature measured so far by NuSTAR ($kT_e=3-22$ keV, depending on the model). This is consistent with a hybrid coronal plasma, in which the primary continuum emission is driven by pair production due to high-energy tail of the energy distribution of non-thermal electrons.

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。

↑