Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Relativistic iron K alpha line detection in the Suzaku spectra of IC
  4329A   We present an analysis of five Suzaku observations of the bright Seyfert1
galaxy IC 4329A. The broad energy band and high signal-to-noise ratio of the
data give new constraints on the iron K alpha line profile and its relationship
with the Compton hump at higher energies. The Fe K bandpass is dominated by a
narrow core (EW=57 eV) at 6.4 keV consistent with neutral material. Using a
physically-motivated model, our analysis also reveals the presence of a broad
Iron K alpha line (EW=124 eV), most likely produced in the inner part of the
accretion disk and blurred by general relativistic effects. This component is
not immediately evident from the individual spectra, but is clearly present in
the stacked residuals of all five observations, and has high statistical
significance. This highlights the difficulty in identifying broad iron lines in
AGN, even in data with very high signal-to-noise ratio, as they are difficult
to disentangle from the continuum. The data are consistent with the narrow and
broad iron line components tracking the Compton Hump, but do not provide clear
evidence that this is the case. An additional narrow FeXXVI emission line at
6.94 keV is also seen, suggesting the presence of ionized material relatively
distant from the central region. There is also a hint of variability, so the
precise origin of this line remains unclear.

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The categories of this paper are: gr-qc
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The categories of this paper are: funct-an
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The categories of this paper are: acc-phys
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The categories of this paper are: math-ph
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The categories of this paper are: bayes-an
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The categories of this paper are: eess
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The categories of this paper are: q-fin
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The categories of this paper are: nucl-ex
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The categories of this paper are: stat
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The categories of this paper are: plasm-ph
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The categories of this paper are: chao-dyn
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The categories of this paper are: mtrl-th
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The categories of this paper are: comp-gas
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The categories of this paper are: alg-geom
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The categories of this paper are: hep-th
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The categories of this paper are: econ