AAS 201st Meeting, January, 2003
Session 11. Seyfert Galaxies and AGNs
Poster, Monday, January 6, 2003, 9:20am-6:30pm, Exhibit Hall AB

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[11.09] Chandra X-ray Spectroscopy of NGC 4151

P. M. Ogle, R. R. J. Antonucci (UCSB), H. L. Marshall (MIT CXC)

NGC 4151 (z=0.00332) is a bright, nearby Seyfert 1.5 active galaxy. It has an extended, photoionized optical and X-ray narrow-line region. We previously explained the strong resonance lines in the Chandra HETGS spectrum by invoking a hot, collisionally ionized intercloud medium (Ogle et al. 2000). We show in this poster that photoexcitation (resonance scattering) is a more consistent explanation.

We have also made new LETGS observations which extend this result to longer wavelengths. We show a detailed photoionization model fit of all H-like and He-like K-shell and Fe L-shell emission lines and recombination continua. We also explore the strong continuum spectral variability to see if it can be explained by a variable absorber.

This research is based on data taken with the Chandra X-ray Observatory and funded by Smithsonian grant G02-3146X.

If you would like more information about this abstract, please follow the link to http://xmmoms.physics.ucsb.edu. This link was provided by the author. When you follow it, you will leave the Web site for this meeting; to return, you should use the Back comand on your browser.

The author(s) of this abstract have provided an email address for comments about the abstract: pmo@xmmom.physics.ucsb.edu

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