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X-Ray Warm Absorber Variability of the Seyfert Galaxy Arakelian 564

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We studied the variability of warm absorber clouds of ionized gas within AGN for the Seyfert 1 galaxy Arakelian 564. The X-ray spectra for four XMM-Newton observations of this object are analyzed using the EPIC and the RGS instruments. These four observations covered 11 years. The ionization parameter ξ of the absorbing matter changed between observations ( logξ = 0.889 ± 3.1 × 10-2 for the 2000 observation and 0.437 ± 7.60 × 10-2 for the year 2001). The X-ray soft excess is studied for the four observations using two black body parameters in EPIC spectra (the first black-body temperature is 3 0.129 ± 2.0 × 10-2 KeV and the second is 2 1.74 ± 7.6 × 10-2 KeV) and one black body parameter in RGS spectra.

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Authors and Affiliations

  1. Department of Astronomy, National Research Institute of Astronomy and Geophysics (NRIAG), Helwan, Cairo, 11421, Egypt

    B. Korany & M. I. Nouh

  2. Department of Physics, Faculty of Applied Science, Umm Al-Qura University, Makkah, Saudi Arabia

    B. Korany

Authors
  1. B. Korany
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  2. M. I. Nouh
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Correspondence to M. I. Nouh.

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Published in Astrofizika, Vol. 62, No. 3, pp. 337-349 (August 2019).

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Korany, B., Nouh, M.I. X-Ray Warm Absorber Variability of the Seyfert Galaxy Arakelian 564. Astrophysics 62, 300–312 (2019). https://doi.org/10.1007/s10511-019-09583-6

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  • DOI: https://doi.org/10.1007/s10511-019-09583-6

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