Matches in SemOpenAlex for { <https://semopenalex.org/work/W3101472620> ?p ?o ?g. }
- W3101472620 endingPage "104" @default.
- W3101472620 startingPage "47" @default.
- W3101472620 abstract "X-ray spectroscopy offers an opportunity to study the complex mixture of emitting and absorbing components in the circumnuclear regions of active galactic nuclei (AGN), and to learn about the accretion process that fuels AGN and the feedback of material to their host galaxies. We describe the spectral signatures that may be studied and review the X-ray spectra and spectral variability of active galaxies, concentrating on progress from recent Chandra, XMM-Newton and Suzaku data for local type 1 AGN. We describe the evidence for absorption covering a wide range of column densities, ionization and dynamics, and discuss the growing evidence for partial-covering absorption from data at energies ≳ 10 keV. Such absorption can also explain the observed X-ray spectral curvature and variability in AGN at lower energies and is likely an important factor in shaping the observed properties of this class of source. Consideration of self-consistent models for local AGN indicates that X-ray spectra likely comprise a combination of absorption and reflection effects from material originating within a few light days of the black hole as well as on larger scales. It is likely that AGN X-ray spectra may be strongly affected by the presence of disk-wind outflows that are expected in systems with high accretion rates, and we describe models that attempt to predict the effects of radiative transfer through such winds, and discuss the prospects for new data to test and address these ideas." @default.
- W3101472620 created "2020-11-23" @default.
- W3101472620 creator A5031087851 @default.
- W3101472620 creator A5074908044 @default.
- W3101472620 date "2009-03-01" @default.
- W3101472620 modified "2023-09-25" @default.
- W3101472620 title "X-ray absorption and reflection in active galactic nuclei" @default.
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