Picture of neon light reading 'Open'

Discover open research at Strathprints as part of International Open Access Week!

23-29 October 2017 is International Open Access Week. The Strathprints institutional repository is a digital archive of Open Access research outputs, all produced by University of Strathclyde researchers.

Explore recent world leading Open Access research content this Open Access Week from across Strathclyde's many research active faculties: Engineering, Science, Humanities, Arts & Social Sciences and Strathclyde Business School.

Explore all Strathclyde Open Access research outputs...

Strathprints

Dielectronic recombination of Fe 3pq ions: a key ingredient for describing x-ray absorption in active galactic nuclei

Badnell, N.R. (2006) Dielectronic recombination of Fe 3pq ions: a key ingredient for describing x-ray absorption in active galactic nuclei. Astrophysical Journal, 651 (1). L73-L76. ISSN 0004-637X

[img]
Preview
 PDF (strathprints005108.pdf)
strathprints005108.pdf - Accepted Author Manuscript
Download (192kB) | Preview

Abstract

We have carried out multiconfiguration Breit-Pauli AUTOSTRUCTURE calculations for the dielectronic recombination (DR) of Fe8+-Fe12+ ions. We obtain total DR rate coefficients for the initial ground level that are an order of magnitude larger than those corresponding to radiative recombination (RR), at temperatures where Fe 3pq () ions are abundant in photoionized plasmas. The resultant total (DR+RR) rate coefficients are then an order of magnitude larger than those currently in use by photoionized plasma modeling codes such as CLOUDY, ION, and XSTAR. These rate coefficients, together with our previous results for and 1, are critical for determining the ionization balance of the M-shell Fe ions that give rise to the prominent unresolved-transition-array X-ray absorption feature found in the spectrum of many active galactic nuclei. This feature is poorly described by CLOUDY and ION, necessitating an ad hoc modification to the low-temperature DR rate coefficients. Such modifications are no longer necessary, and a rigorous approach to such modeling can now take place using these data.

Item type: Article
ID code: 5108
Keywords: atomic data, atomic processes, galaxies, active - galaxies, nuclei - X-rays, plasmas, Plasma physics. Ionized gases, Astronomy and Astrophysics, Space and Planetary Science
Subjects: Science > Physics > Plasma physics. Ionized gases
Department: Faculty of Science > Physics
Depositing user: Strathprints Administrator
Date deposited: 08 Jan 2008
Last modified: 25 Sep 2017 01:25
Related URLs:
URI: https://strathprints.strath.ac.uk/id/eprint/5108
Export data:
CORE (COnnecting REpositories)