BeppoSAX observations of Narrow-line Seyfert 1 galaxies. II. Ionized iron features in Arakelian 564

A. Comastri, G. M. Stirpe, C. Vignali, W. N. Brandt, K. M. Leighly, F. Fiore, M. Guainazzi, G. Matt, F. Nicastro, E. M. Puchnarewicz, A. Siemiginowska

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Abstract

The BeppoSAX observations of the bright Narrow-Line Seyfert 1 galaxy Ark 564 are presented along with a high quality optical spectrum taken at the 1.5 m telescope at La Silla. The 0.1-10 keV X-ray spectrum is characterized by a strong soft component which is best described by blackbody-like emission with a temperature of ∼160 eV. At higher energies a steep (Γ ≃ 2.4) power-law tail is present. There is evidence of an ionized reflector in the form of an iron line and edge. We do not find significant evidence of soft X-ray features if the spectrum is modelled with a two component continuum. The optical and X-ray spectrum properties support the hypothesis of a high accretion rate onto a low mass black hole.

Original languageEnglish (US)
Pages (from-to)400-408
Number of pages9
JournalAstronomy and Astrophysics
Volume365
Issue number3
DOIs
StatePublished - Jan 1 2001

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All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

Comastri, A., Stirpe, G. M., Vignali, C., Brandt, W. N., Leighly, K. M., Fiore, F., Guainazzi, M., Matt, G., Nicastro, F., Puchnarewicz, E. M., & Siemiginowska, A. (2001). BeppoSAX observations of Narrow-line Seyfert 1 galaxies. II. Ionized iron features in Arakelian 564. Astronomy and Astrophysics, 365(3), 400-408. https://doi.org/10.1051/0004-6361:20000152