X-ray spectra of the Fe-L complex: II. Atomic data constraints from the EBIT experiment and X-ray grating observations of Capella

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F20%3A00116665" target="_blank" >RIV/00216224:14310/20:00116665 - isvavai.cz</a>

Result on the web

<a href="https://www.aanda.org/articles/aa/pdf/2020/09/aa37948-20.pdf" target="_blank" >https://www.aanda.org/articles/aa/pdf/2020/09/aa37948-20.pdf</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1051/0004-6361/202037948" target="_blank" >10.1051/0004-6361/202037948</a>

Result language

angličtina

Original language name

X-ray spectra of the Fe-L complex: II. Atomic data constraints from the EBIT experiment and X-ray grating observations of Capella

Original language description

The Hitomi results for the Perseus cluster have shown that accurate atomic models are essential to the success of X-ray spectroscopic missions and just as important as the store of knowledge on instrumental calibration and astrophysical modeling. Preparing the models requires a multifaceted approach, including theoretical calculations, laboratory measurements, and calibration using real observations. In a previous paper, we presented a calculation of the electron impact cross sections on the transitions forming the Fe-L complex. In the present work, we systematically tested the calculation against cross-sections of ions measured in an electron beam ion trap experiment. A two-dimensional analysis in the electron beam energies and X-ray photon energies was utilized to disentangle radiative channels following dielectronic recombination, direct electron-impact excitation, and resonant excitation processes in the experimental data. The data calibrated through laboratory measurements were further fed into a global modeling of the Chandra grating spectrum of Capella. We investigated and compared the fit quality, as well as the sensitivity of the derived physical parameters to the underlying atomic data and the astrophysical plasma modeling. We further list the potential areas of disagreement between the observations and the present calculations, which, in turn, calls for renewed efforts with regard to theoretical calculations and targeted laboratory measurements.

Czech name

—

Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10308 - Astronomy (including astrophysics,space science)

Project

—

Continuities

S - Specificky vyzkum na vysokych skolach

Publication year

2020

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Astronomy and Astrophysics

ISSN

0004-6361

e-ISSN

—

Volume of the periodical

641

Issue of the periodical within the volume

93

Country of publishing house

FR - FRANCE

Number of pages

28

Pages from-to

1-28

UT code for WoS article

000573421200001

EID of the result in the Scopus database

2-s2.0-85092776882