Fe K emission from the hidden quasar IRAS P09104+4109

A. C. Fabian, Y. Shioya, K. Iwasawa, K. Nandra, C. Crawford, R. Johnstone, H. Kunieda, R. Mcmahon, K. Makishima, T. Murayama, T. Ohashi, Y. Tanaka, Y. Taniguch̀i, Y. Terashima

Research output: Contribution to journalArticlepeer-review

17 Citations (Scopus)

Abstract

We report the discovery of a strong Fe K line in the ASCA spectrum of the infrared-luminous galaxy IRAS P09104+4109 at a redshift z = 0.442. It is the most distant Fe K emission line detected so far. The large equivalent width (EW ∼ 450 eV) and X-ray continuum spectrum, which has Γ ≈ 2.0 with little absorption, favors a model in which the observed X-rays are scattered into our line of sight from a hidden quasar. Previous work has shown that the source has strong narrow emission lines and a highly polarized continuum in the optical and a strong infrared excess, similar to Seyfert 2 galaxies. The observed X-ray luminosity is LX ≈ 2 x 1045 ergs s-1 in the rest frame 2-10 keV band; the large obscuration suggested by the optical and infrared studies implies that the hidden quasar has an intrinsic luminosity of LBol = 5 x 1047 ergs s-1. Our results indicate that IRAS P09104+4109 is the prototype of a new class of Seyfert 2 nuclei, which emit at quasar luminosities.

Original languageEnglish
Pages (from-to)L51-L54
JournalAstrophysical Journal
Volume436
Issue number1 PART 2
DOIs
Publication statusPublished - 1994 Nov 20

Keywords

  • Galaxies: active
  • X-rays: galaxies

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

Fingerprint Dive into the research topics of 'Fe K emission from the hidden quasar IRAS P09104+4109'. Together they form a unique fingerprint.

Cite this