2019A&A...626A..83D


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.14CEST18:42:53

2019A&A...626A..83D - Astronomy and Astrophysics, volume 626A, 83-83 (2019/6-1)

Plasma environment effects on K lines of astrophysical interest. II. Ionization potentials, K thresholds, radiative rates, and Auger widths in Ne- through He-like iron ions (Fe XVII - Fe XXV).

DEPRINCE J., BAUTISTA M.A., FRITZSCHE S., GARCIA J.A., KALLMAN T., MENDOZA C., PALMERI P. and QUINET P.

Abstract (from CDS):


Aims. In the context of accretion disks around black holes, we estimate plasma-environment effects on the atomic parameters associated with the decay of K-vacancy states in highly charged iron ions, namely FeXVII-FeXXV.
Methods. Within the relativistic multiconfiguration Dirac-Fock (MCDF) framework, the electron-nucleus and electron-electron plasma screenings were approximated with a time-averaged Debye-Huckel potential.
Results. Modified ionization potentials, K thresholds, wavelengths, radiative emission rates, and Auger widths are reported for astrophysical plasmas characterized by electron temperatures and densities in the ranges 105-107K and 1018-1022cm–3, respectively.
Conclusions. We conclude that the high-resolution microcalorimeters on board future X-ray missions such as XRISM and ATHENA are expected to be sensitive to the lowering of the iron K edge due to the extreme plasma conditions occurring in accretion disks around compact objects.

Abstract Copyright: © ESO 2019

Journal keyword(s): black hole physics - plasmas - atomic data - X-rays: general

VizieR on-line data: <Available at CDS (J/A+A/626/A83): table5.dat table6.dat>

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2020.07.14-18:42:53

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