X-ray characteristics of NGC3516: A view through the complex absorber

Journal article

We consider new Suzaku data for NGC3516 taken during 2009 along with other recent X-ray observations of the source. The cumulative characteristics of NGC3516 cannot be explained without invoking changes in the line-of-sight absorption. Contrary to many other well-studied Seyfert galaxies, NGC3516 does not show a positive lag of hard X-ray photons relative to soft photons over the timescales sampled. In the context of reverberation models for the X-ray lags, the lack of such a signal in NGC3516 is consistent with flux variations being dominated by absorption changes. The lack of any reverberation signal in such a highly variable source disfavors intrinsic continuum variability in this case. Instead, the colorless flux variations observed at high flux states for NGC3516 are suggested to be a consequence of Compton-thick clumps of gas crossing the line of sight. © 2011. The American Astronomical Society. All rights reserved..

Authors: Turner, T; Miller, L; Kraemer, S; Reeves, J

• Publisher: Institute of Physics Publishing
• Journal: Astrophysical Journal
• Volume: 733
• Issue: 1
• Publication date: 2011-05-20
• DOI: 10.1088/0004-637X/733/1/48
• EISSN: 1538-4357
• ISSN: 0004-637X
• Language: English
• Keywords: galaxies: active; galaxies: individual (NGC 3516); galaxies: Seyfert; X-rays: galaxies