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ASCA Observations of Seyfert 2 Galaxies

Published online by Cambridge University Press:  12 April 2016

H. Awaki
H. Awaki*
Affiliation:
Department of Physics, Faculty of Science, Kyoto University, Kitashirakawa, Sakyo, Kyoto, 606-01, Japan

Abstract

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We have observed a sample of Seyfert 2 galaxies with ASCA. The targets were selected based on their [O III] λ5007 flux, the existence of polarized broad lines, and previous X-ray detection. The nuclear luminosities of these galaxies range from 1042 to 1044 ergs s−1 in the 2–10 keV band. Obscured nuclei were found in all galaxies in our sample, with absorption column densities distributed around a value of 1023.5 cm−2.

The cold iron Kα line was clearly detected in half of our sample, and emission from He-like and H-like Fe Kα was detected from two galaxies. These lines are explained by fluorescent lines from thick cold matter and warm/hot thin matter. Highly ionized lines originating in starburst activity were also detected from NGC 1068.

Type
I. X-Rays and the Nuclear Regions of Active Galaxies
Information
International Astronomical Union Colloquium , Volume 159: Emission Lines in Active Galaxies: New Methods and Techniques , 1997 , pp. 44 - 51
Copyright
Copyright © Astronomical Society of the Pacific 1997

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