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 1406.2645astro-ph.HE
收藏

关于Seyfert星系WAX样本中超快外流的存在

On the presence of ultra-fast outflows in the WAX sample of Seyfert galaxies

Francesco Tombesi, Massimo Cappi

摘要:

活动星系核(AGN)风的研究是至关重要的,因为它们可能提供长期以来一直寻求的中心黑洞和宿主星系之间的联系,建立AGN反馈。最近,Laha等人(2014)报告了用XMM-牛顿观察到的26个Seyfert样品的X射线分析,这些样品是所谓的X射线(WAX)样品中的暖吸收体的一部分。他们声称,在Tombesi等人(2010)之前分析的四次观测中,没有检测到铁钾吸收剂,这表明超快外流(UFO)。他们主要将Tombesi等人的探测归因于E=4-10 keV波段的基础连续谱的不正确建模。因此,我们在这里重新解决这些检测的鲁棒性,我们发现,声称未检测到的主要原因可能是由于他们使用的单一事件的光谱,这减少了40%的总计数。利用它们的模型和光谱(包括双事件)对整个E=0.3-10 keV能带的数据进行重新分析,发现蓝移的Fe K吸收线确实在> 99%处被探测到。这项工作证明了这些检测的鲁棒性XMM牛顿甚至包括复杂的模型组件,如反射,相对论线和暖吸收。

英文摘要:

The study of winds in active galactic nuclei (AGN) is of utmost importance as they may provide the long sought-after link between the central black hole and the host galaxy, establishing the AGN feedback. Recently, Laha et al. (2014) reported the X-ray analysis of a sample of 26 Seyferts observed with XMM-Newton, which are part of the so-called warm absorbers in X-rays (WAX) sample. They claim the non-detection of Fe K absorbers indicative of ultra-fast outflows (UFOs) in four observations previously analyzed by Tombesi et al. (2010). They mainly impute the Tombesi et al. detections to an improper modeling of the underlying continuum in the E=4-10 keV band. We therefore re-address here the robustness of these detections and we find that the main reason for the claimed non-detections is likely due to their use of single events only spectra, which reduces the total counts by 40%. Performing a re-analysis of the data in the whole E=0.3-10 keV energy band using their models and spectra including also double events, we find that the blue-shifted Fe K absorption lines are indeed detected at >99%. This work demonstrates the robustness of these detections in XMM-Newton even including complex model components such as reflection, relativistic lines and warm absorbers.

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。

↑