Wide-band spectroscopy of the Compton thick Seyfert 2 galaxy Markarian 3 with Suzaku

Hisamitsu Awaki, Naohisa Anabuki, Yasushi Fukazawa, Luigi C. Gallo, Shinya Ikeda, Naoki Isobe, Takeshi Itoh, Hideyo Kunieda, Kazuo Makishima, Alex Markowitz, Giovanni Miniutti, Tsunefumi Mizuno, Takashi Okajima, Andrew Ptak, James N. Reeves, Tadayuki Takahashi, Yuichi Terashima, Tahir Yaqoob

Research output: Contribution to journalArticlepeer-review

30 Citations (Scopus)

Abstract

We obtained a wide-band spectrum of the Compton-thick Seyfert 2 galaxy Mkn 3 with Suzaku. The observed spectrum was clearly resolved into weak, soft power-law emission, a heavily absorbed power-law component, cold reflection, and many emission lines. The heavily absorbed component, absorbed by gas with a column density of 1. 1 x 10(24) cm(-2), has an intrinsic 2-10 keV luminosity of similar to 1. 6 x 10(43) erg s(-1), and is considered to be direct emission from the Mkn 3 nucleus. The reflection component was interpreted as being the reflection of direct light off a cold, thick material; the reflection fraction, R, was 1.36 +/- 0.20. The cold material is inferred to be located > 1 pc from the central black hole of Mkn 3, due to the low ionization parameter of iron ( xi I erg cm s(-1)) and the narrow iron line width (sigma < 22 eV). The weak, soft power-law emission is considered to be scattered light by ionized gas with a scattering fraction of 0.9 +/- 0.2%. The existence of many highly ionized lines in the observed spectrum indicates that the ionized gas has a broad ionized structure, with xi = 10-1000 erg cm s(-1). This high-quality spectrum obtained by Suzaku can be considered to be a template for studies of Seyfert 2 galaxies.

Original languageEnglish
Number of pages13
JournalPublications of the Astronomical Society of Japan
Volume60
Publication statusPublished - 2008

Keywords

  • galaxies : active
  • galaxies : individual (Markarian 3)
  • galaxies : Seyfert
  • X-RAY-SPECTRUM
  • ACTIVE GALACTIC NUCLEI
  • NARROW-LINE REGION
  • BOARD SUZAKU
  • K-LINES
  • IRON
  • ABUNDANCES
  • ALPHA
  • SPECTROPOLARIMETRY
  • PHOTOIONIZATION

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