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 (Feâ XVII-Feâ XXV)

Deprince, J.; Bautista, M. A.; Fritzsche, S.; García, J. A.; Kallman, T.; Mendoza, C.; Palmeri, P.; Quinet, Pascal

doi:10.1051/0004-6361/201935444

Article (Scientific journals)

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 (Feâ XVII-Feâ XXV)

Deprince, J.; Bautista, M. A.; Fritzsche, S. et al.

2019 • In Astronomy and Astrophysics, 626, p. 83

Peer Reviewed verified by ORBi

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https://hdl.handle.net/2268/260934

DOI
10.1051/0004-6361/201935444

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Keywords :

Atomic data; Black hole physics; Plasmas; X-rays: general; Astrophysics; Atomic physics; Augers; Compact disks; Electrons; Gravitation; Ionization potential; Iron; Metal ions; Plasma (human); Stars; X rays; Astrophysical plasma; Future X-ray missions; Multiconfiguration Dirac-Fock; Plasma environments; Radiative emissions; Electron temperature

Abstract :

[en] 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 Feâ XVII-Feâ XXV. Methods. Within the relativistic multiconfiguration Dirac-Fock (MCDF) framework, the electron-nucleus and electron-electron plasma screenings were approximated with a time-Averaged Debye-Hückel 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 105â-Â 107 K and 1018â-Â 1022 cm-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. © ESO 2019.

Disciplines :

Space science, astronomy & astrophysics
Physics

Author, co-author :

Deprince, J.; Physique Atomique et Astrophysique, Université de Mons UMONS, Mons, 7000, Belgium

Bautista, M. A.; Department of Physics, Western Michigan University, Kalamazoo, MI 49008, United States

Fritzsche, S.; Helmholtz Institut Jena, Jena, 07743, Germany, Theoretisch Physikalisches Institut, Friedrich Schiller Universität Jena, Jena, 07743, Germany

García, J. A.; Cahill Center for Astronomy and Astrophysics, California Institute of Technology, Pasadena, CA 91125, United States, Dr. Karl Remeis-Observatory and Erlangen Centre for Astroparticle Physics, Sternwartstr. 7, Bamberg, 96049, Germany

Kallman, T.; NASA Goddard Space Flight Center, Greenbelt, MD 662, United States

Mendoza, C.; Department of Physics, Western Michigan University, Kalamazoo, MI 49008, United States

Palmeri, P.; Physique Atomique et Astrophysique, Université de Mons UMONS, Mons, 7000, Belgium

Quinet, Pascal ; Université de Liège - ULiège > Département de physique > Spectroscopie atomique et Physique des atomes froids

Language :

English

Title :

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 (Feâ XVII-Feâ XXV)

Publication date :

2019

Journal title :

Astronomy and Astrophysics

ISSN :

0004-6361

eISSN :

1432-0746

Publisher :

EDP Sciences

Volume :

626

Pages :

A83

Peer reviewed :

Peer Reviewed verified by ORBi

Funders :

AvH - Alexander von Humboldt-Stiftung [DE]

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