English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

We present an analysis of five Suzaku observations of the bright Seyfert1galaxy IC 4329A. The broad energy band and high signal-to-noise ratio of thedata give new constraints on the iron K alpha line profile and its relationshipwith the Compton hump at higher energies. The Fe K bandpass is dominated by anarrow core (EW=57 eV) at 6.4 keV consistent with neutral material. Using aphysically-motivated model, our analysis also reveals the presence of a broadIron K alpha line (EW=124 eV), most likely produced in the inner part of theaccretion disk and blurred by general relativistic effects. This component isnot immediately evident from the individual spectra, but is clearly present inthe stacked residuals of all five observations, and has high statisticalsignificance. This highlights the difficulty in identifying broad iron lines inAGN, even in data with very high signal-to-noise ratio, as they are difficultto disentangle from the continuum. The data are consistent with the narrow andbroad iron line components tracking the Compton Hump, but do not provide clearevidence that this is the case. An additional narrow FeXXVI emission line at6.94 keV is also seen, suggesting the presence of ionized material relativelydistant from the central region. There is also a hint of variability, so theprecise origin of this line remains unclear.

Relativistic iron K alpha line detection in the Suzaku spectra of IC 4329A