Detection of a QPO in five XMM-Newton observations of RE J1034+396

被引：50
作者：
Alston, W. N. [1 ]
Markeviciute, J. [1 ]
Kara, E. [1 ]
Fabian, A. C. [1 ]
Middleton, M. [1 ]
机构：
[1] Univ Cambridge, Inst Astron, Cambridge CB3 0HA, England
来源：
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2014年 / 445卷 / 01期
关键词：
galaxies: individual: RE J1034+396; galaxies: Seyfert; X-rays: galaxies; QUASI-PERIODIC OSCILLATIONS; ACTIVE GALACTIC NUCLEI; MICROQUASAR GRO J1655-40; X-RAY VARIABILITY; BLACK-HOLE; POWER-SPECTRUM; GALAXIES; DISCOVERY; RXTE; CANDIDATE;
D O I：
10.1093/mnrasl/slu127
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
The X-ray quasi-periodic oscillation (QPO) at similar to 2.6 x 10(-4) Hz in RE J1034+396 has been robustly observed in the 0.2-10 keV band of one similar to 90 ks XMM-Newton observation, but was not detected in subsequent observations. Here, we investigate the power spectral density (PSD) of eight archival XMM-Newton observations of RE J1034+396, and search for the presence of QPOs in three energy bands: soft (0.3-0.8 keV); hard (1.0-4.0 keV) and total (0.2-10.0 keV). We find a significant detection of a QPO feature in the hard-band PSD of five low-flux/spectrally harder observations. The QPO frequency has remained persistent at similar to 2.6 x 10(-4) Hz over similar to 4 yr of observations, though it is no longer detected in the soft band, except in the original observation. This result increases the duration where the QPO is present by a factor of 3 (now similar to 250 ks), allowing for a better understanding of the QPO phenomenon observed in both active galactic nuclei and black hole X-ray Binaries.
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页码：L16 / L20
页数：5
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