Journal
ASTROPHYSICAL JOURNAL
Volume 767, Issue 2, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/0004-637X/767/2/123
Keywords
atomic data; atomic processes; galaxies: active; line: formation; methods: numerical; X-rays: galaxies
Categories
Funding
- NSF [0908877, 1108928, 1109061]
- NASA [10-ATP10-0053, 10-ADAP10-0073, NNX12AH73G]
- JPL (RSA) [1430426]
- STScI [HST-AR-12125.01, GO-12560, HST-GO-12309]
- European Social Fund under the Global Grant measure [VP1-3.1-SMM-07-K-02-013]
- William Penney Fellowship
- Belgian Science Policy office through the ESA PRODEX programme
- Direct For Mathematical & Physical Scien [1108928] Funding Source: National Science Foundation
- Division Of Astronomical Sciences [1108928] Funding Source: National Science Foundation
- Division Of Astronomical Sciences
- Direct For Mathematical & Physical Scien [1109061] Funding Source: National Science Foundation
- Science and Technology Facilities Council [ST/I001123/1, ST/F002270/1] Funding Source: researchfish
- STFC [ST/F002270/1, ST/I001123/1] Funding Source: UKRI
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The Fe unresolved transition arrays (UTAs) produce prominent features in the similar to 15-17 angstrom 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 Fe XIV, Fe XV, and Fe XVI. 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.
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