000002184 001__ 2184
000002184 005__ 20160701171700.0
000002184 0247_ $$2DOI$$a10.1088/0004-637X/767/2/123
000002184 037__ $$aASTROimport-341
000002184 100__ $$aFerland, G. J.
000002184 245__ $$aExpanded Iron UTA Spectra—Probing the Thermal Stability Limits in AGN Clouds
000002184 260__ $$c2013
000002184 520__ $$aThe Fe unresolved transition arrays (UTAs) produce prominent features in the ~15-17 Å wavelength range in the spectra of active galactic nuclei (AGNs). Here, we present new calculations of the energies and oscillator strengths of inner-shell lines from Fe XIV, Fe XV, and Fe XVI. These are crucial ions since they are dominant at inflection points in the gas thermal stability curve, and UTA excitation followed by autoionization is an important ionization mechanism for these species. We incorporate these, and data reported in previous papers, into the plasma simulation code Cloudy. This updated physics is subsequently employed to reconsider the thermally stable phases in absorbing media in AGNs. We show how the absorption profile of the Fe XIV UTA depends on density, due to the changing populations of levels within the ground configuration. 
000002184 700__ $$a Kisielius, R.
000002184 700__ $$a Keenan, F. P.
000002184 700__ $$a van Hoof, P. A. M.
000002184 700__ $$a Jonauskas, V.
000002184 700__ $$a Lykins, M. L.
000002184 700__ $$a Porter, R. L.
000002184 700__ $$a Williams, R. J. R.
000002184 773__ $$c123$$i2$$pThe Astrophysical Journal$$v767$$y2013
000002184 85642 $$ahttp://esoads.eso.org/abs/2013ApJ...767..123F
000002184 905__ $$apublished in
000002184 980__ $$aREFERD