Hostname: page-component-cd9895bd7-7cvxr Total loading time: 0 Render date: 2024-12-25T15:49:43.464Z Has data issue: false hasContentIssue false
  • English
  • Français

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

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

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

References

Antonucci, R.R.J., & Miller, J.S. 1985, ApJ, 297, 621.Google Scholar
Awaki, H., et al. 1991, PASJ, 43, 195.Google Scholar
Awaki, H., et al. 1996, in preparation.Google Scholar
Cappi, M., et al. 1996, ApJ, 456, 141.Google Scholar
Dahari, O., & De Robertis, M.M. 1988, ApJS, 67, 249.Google Scholar
Fukazawa, H., et al. 1994, PASJ, 46, L141.Google Scholar
Iwasawa, K., et al. 1994, PASJ, 46, L167.Google Scholar
Iwasawa, K. 1994, Ph.D. Thesis, Nagoya University.Google Scholar
Iwasawa, K., et al. 1996, to be submitted to A&A.Google Scholar
Kallman, T.R., and McCray, R. 1982, ApJS, 51, 263.Google Scholar
Makishima, K., et al. 1997, this volume.Google Scholar
Marshall, F., et al. 1993, ApJ, 405, 168.Google Scholar
Matt, G., et al. 1996, MNRAS, in press.Google Scholar
Miller, J.S., and Goodrich, R.W. 1994, ApJ, 355, 456.Google Scholar
Nagase, F., et al. 1994, ApJ, 436, L1.Google Scholar
Nakagawa, T., et al. 1996, in preparation.Google Scholar
Tran, H.D., et al. 1992, ApJ, 397, 452.CrossRefGoogle Scholar
Ueno, S., et al. 1994, PASJ, 46, L71.Google Scholar
Ueno, S., et al. 1996a, in preparation.Google Scholar
Ueno, S., et al. 1996b, PASJ, 48, 389.Google Scholar
Whittle, M. 1992, ApJS, 79, 49.CrossRefGoogle Scholar