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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…
Associations of decimetric type III bursts with coronal mass ejections and Hα flares
Lin, Jun; Ma, Yuan; Wang, De-Yu +2 more
We present a statistical study of decimetric type III radio bursts, coronal mass ejections (CMEs), and Hα flares observed in the period from July 2000 to March 2005. In total, we investigated 395 decimetric type III radio burst events, 21% of which showed apparent correlation to CMEs that were associated with Hα flares. We noticed that the Hα flar…