• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>The Astrophysical journal >FOURIER-RESOLVED SPECTROSCOPY OF ACTIVE GALACTIC NUCLEI USING XMM-NEWTON DATA. I. THE 3-10 keV BAND RESULTS
【24h】

FOURIER-RESOLVED SPECTROSCOPY OF ACTIVE GALACTIC NUCLEI USING XMM-NEWTON DATA. I. THE 3-10 keV BAND RESULTS

机译：使用XMM-牛顿数据的活性银河系核素的傅立叶分辨光谱。 I. 3-10 keV频段结果

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

We present the results from Fourier-resolved spectroscopy of archival XMM-Newton data of five AGNs, namely, Mrk 766, NGC 3516, NGC 3783, NGC 4051, and Ark 564. This work supplements an earlier study of MCG -6-30-15 and of several Galactic black hole candidate sources. Our results exhibit much larger diversity than for Galactic sources, a fact we attribute to the diversity of their masses. When we take into account this effect and combine our results with those for Cyg X-l, it seems reasonable to conclude that at high frequencies, the slope of the Fourier-resolved spectra in accreting black hole systems decreases with increasing frequency as ∝ f~(-0.25), irrespective of whether the system is in its high or low state. This result implies that the flux variations in AGNs are accompanied by complex spectral slope variations as well. We also find that the Fe Kα line in Mrk 766, NGC 3783, and NGC 4051 is variable on timescales of ～1 day to 1 hr. The iron fluorescence line is absent in the spectra of the highest frequencies, and there is an indication that, just like in Cyg X-l, the equivalent width of the line in the Fourier-resolved AGNs decreases with increasing frequency.
机译：我们介绍了五个AGN（即Mrk 766，NGC 3516，NGC 3783，NGC 4051和Ark 564）的AGN档案XMM-牛顿数据的傅里叶分辨光谱结果。这项工作补充了对MCG -6-30-的较早研究。 15个，以及几个银河黑洞候选源。我们的结果显示出比银河源更大的多样性，这是我们归因于它们质量的多样性。当我们考虑到这种影响并将我们的结果与Cyg Xl的结果相结合时，似乎可以合理地得出结论，在高频下，吸积黑洞系统中的傅立叶分辨谱的斜率随频率的增加而降低，随着∝ f〜（- 0.25），无论系统处于高状态还是低状态。该结果表明，AGN中的通量变化也伴随着复杂的频谱斜率变化。我们还发现Mrk 766，NGC 3783和NGC 4051中的FeKα谱线在约1天到1小时的时间尺度上是可变的。铁荧光线在最高频率的光谱中不存在，并且有迹象表明，就像在Cyg X-1中一样，傅立叶分辨AGN中的线等效宽度随频率的增加而减小。

著录项

相似文献

  • 外文文献
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号