Fe K emission from the hidden quasar IRAS P09104+4109

Details Fe K emission from the hidden quasar IRAS P09104+4109 Fe K emission from the hidden quasar IRAS P09104+4109

Nov 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994apj...436l..51f&link_type=abstract

Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 436, no. 1, p. L51-L54

Astronomy and Astrophysics

Astronomy

27

Active Galactic Nuclei, Infrared Astronomy, K Lines, Quasars, Seyfert Galaxies, Stellar Luminosity, Emission Spectra, Iron, X Ray Astronomy, X Ray Scattering

Scientific paper

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 approximately 450 eV) and X-ray continuum spectrum, which has Gamma approximately equal to 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 is approximately equal to 2 x 1045 ergs/s 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. Our results indicate that IRAS P09104+4109 is the prototype of a new class of Seyfert 2 nuclei, which emit at quasar luminosities.

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