The 6.7 keV KALPHA complex of He-like iron in transient plasmas
| dc.creator | Oelgoetz, Justin | |
| dc.creator | Pradhan, Anil K. | |
| dc.date | 2004-08-03 | |
| dc.date.accessioned | 2026-07-07T10:27:16Z | |
| dc.date.available | 2026-07-07T10:27:16Z | |
| dc.description | Time dependent numerical simulations of the K ALPHA complex of Fe XXV are carried out as a function of temperature/density/radiation field variations in high-temperature astrophysical and laboratory plasmas. In addition to several well known features, the transient and steady state spectra reveal the effects due to (a) time-dependent thermal and non-thermal radiation fields, (b) photo and collisional excitation and ionization, and (c) high densities, on the `quartet' of principal w,x,y,z lines, and dielectronic satellites. The highly detailed models show precisely how, assuming a temporal-temperature correlation, the X-ray intensity varies between 6.6 - 6.7 keV and undergoes a `spectral inversion' in the w and z line intensities, characterizing an ionization or a recombination dominated plasma. The dielectronic satellite intensities are the most temperature dependent features, but insensitive to density variations, and significantly contribute to the K ALPHA complex for T < 6.7 keV leading to asymmetric profiles. The 6.7 keV K ALPHA complex should be a potential diagnostic of X-ray flares in AGN, afterglows in gamma-ray bursts, and other non-equilibrium sources with the high-resolution measurements possible from the upcoming mission Astro-E2. It is also shown that high electron densities attenuate the line intensities in simulations relevant to laboratory plasmas, such as in inertial confinement fusion, laser, or magnetic Z-pinch devices. | |
| dc.description | 13 pages, 4 figures, 1 postscript coversheet. This is a preprint of an article accepted for publication in the Monthly Notices of the Royal Astronomical Society | |
| dc.identifier | https://arxiv.org/abs/astro-ph/0408065 | |
| dc.identifier | http://arxiv.org/abs/astro-ph/0408065 | |
| dc.identifier | Mon.Not.Roy.Astron.Soc.354:1093-1102,2004 | |
| dc.identifier | doi:10.1111/j.1365-2966.2004.08269.x | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/177105 | |
| dc.subject | Astrophysics | |
| dc.subject | Atomic Physics | |
| dc.title | The 6.7 keV KALPHA complex of He-like iron in transient plasmas | |
| dc.type | text |