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XMM-Newton observations of H2O maser galaxy NGC 7479
Wang, Jin; Zhang, Jiang-Shui; Fan, Jun-Hui
The XMM-Newton observations of H2O megamaser galaxy NGC 7479 are presented. Its smoothed X-ray image clearly shows spiral morphology, which matches well with its optical asymmetric spiral structure. One prominent source can be found at the tip of its northern spiral arm, which is much brighter than its nuclear X-ray source (about a 50% …
Variations in the X-ray eclipse transitions of Cen X-3
Paul, Biswajit; Devasia, Jincy; James, Marykutty +1 more
We report here an investigation of the X-ray eclipse transitions of the high mass X-ray binary pulsar Cen X-3 in different intensity states. The long term light curve of Cen X-3 obtained with RXTE-ASM spanning more than 5000d shows strong aperiodic flux variations with low and high states. We have investigated the eclipse transitions of Cen X-3 in…
Fe Kα line profile in AGNs: average shape and redshift dependence
Zhao, Gang; Zhang, Shu; Hu, Chen +2 more
We collect a sample of 381 (271 type I) active galactic nuclei (AGNs) with XMM-Newton observations for an analysis of the dependence of Fe Kα profiles on redshifts to test the potential cosmological evolution of spins of supermassive black holes (SMBHs). The sample spans a redshift range of z = 0.0008 -4.76, which allows us to rebin the sample int…