J/ApJ/767/123 FeXIV, FeXV and FeXVI transitions (Ferland+, 2013)
Expanded iron UTA Spectra--Probing the thermal stability limits in AGN clouds.
Ferland G.J., Kisielius R., Keenan F.P., van Hoof P.A.M., Jonauskas V.,
Lykins M.L., Porter R.L., Williams R.J.R.
<Astrophys. J., 767, 123 (2013)>
=2013ApJ...767..123F 2013ApJ...767..123F
ADC_Keywords: Atomic physics
Keywords: atomic data; atomic processes; galaxies: active; line: formation;
methods: numerical; X-rays: galaxies
Abstract:
The Fe unresolved transition arrays (UTAs) produce prominent features
in the ∼15-17Å wavelength range in the spectra of active galactic
nuclei (AGNs). Here, we present new calculations of the energies and
oscillator strengths of inner-shell lines from FeXIV, FeXV, and FeXVI.
These are crucial ions since they are dominant at inflection points in
the gas thermal stability curve, and UTA excitation followed by
autoionization is an important ionization mechanism for these species.
We incorporate these, and data reported in previous papers, into the
plasma simulation code Cloudy. This updated physics is subsequently
employed to reconsider the thermally stable phases in absorbing media
in AGNs. We show how the absorption profile of the Fe XIV UTA depends
on density, due to the changing populations of levels within the
ground configuration.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 24 136 Transitions from L shell to nj=3,4,5 shells
in Fe15+ ions
table2.dat 24 98 Transitions from L shell to nj=3,4,5 shells
in Fe14+ ions
table3.dat 24 750 Transitions from L shell to nj=3,4,5 shells
in Fe13+ ions
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See also:
J/ApJS/207/11 : Fe XVI radiative rates (Diaz+, 2013)
J/A+A/543/A144 : Fe XIII soft X-ray lines (Del Zanna+, 2012)
J/ApJS/190/322 : R-matrix electron-impact excitation of Fe13+ (Liang+, 2010)
J/A+A/511/A78 : Fe XIII electron impact excitation (Storey+, 2010)
J/A+A/463/399 : Fe XVI radiative rates (Aggarwal+, 2007)
J/A+A/450/1249 : Fe XVI radiative and excitation rates (Aggarwal+, 2006)
J/A+A/429/1117 : Fe XIII effective collision strengths (Aggarwal+, 2005)
J/A+A/418/371 : Electron impact excitation of Fe XIII (Aggarwal+, 2004)
J/A+A/414/377 : FeX-FeXVII fine-structure K-vacancy levels (Mendoza+, 2004)
J/A+A/410/349 : Effective collision strengths in Fe XV (Aggarwal+, 2003)
J/A+AS/137/165 : IRON Project XXXVIII. Fe XV (Eissner+ 1999)
J/ApJS/121/265 : Oscillator Strengths and Radiative Rates for FeXV (Deb+, 1999)
Byte-by-byte Description of file: table[123].dat
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Bytes Format Units Label Explanations
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1- 2 A2 --- nl Initial shell identifier (2p or 2s)
4 I1 --- nj [3/5] Final shell for optical electron transition
6 I1 --- gi Statistical weight of initial level
8 I1 --- gj Statistical weight of final level
10- 15 F6.3 0.1nm lambda [10.26/17.25] Line wavelength; in Angstroms
17- 24 E8.2 --- fij Absorption oscillator strength
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 20-Nov-2014