Atomic data and spectral modeling constraints from high-resolution X-ray observations of the Perseus cluster with Hitomi
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F18%3A00103827" target="_blank" >RIV/00216224:14310/18:00103827 - isvavai.cz</a>
Result on the web
<a href="https://arxiv.org/pdf/1712.05407.pdf" target="_blank" >https://arxiv.org/pdf/1712.05407.pdf</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1093/pasj/psx156" target="_blank" >10.1093/pasj/psx156</a>
Alternative languages
Result language
angličtina
Original language name
Atomic data and spectral modeling constraints from high-resolution X-ray observations of the Perseus cluster with Hitomi
Original language description
The Hitomi Soft X-ray Spectrometer spectrum of the Perseus cluster, with similar to 5 eV resolution in the 2-9 keV band, offers an unprecedented benchmark of the atomic modeling and database for hot collisional plasmas. It reveals both successes and challenges of the current atomic data and models. The latest versions of AtomDB/APEC (3.0.8), SPEX (3.03.00), and CHIANTI (8.0) all provide reasonable fits to the broad-band spectrum, and are in close agreement on best-fit temperature, emission measure, and abundances of a few elements such as Ni. For the Fe abundance, the APEC and SPEX measurements differ by 16%, which is 17 times higher than the statistical uncertainty. This is mostly attributed to the differences in adopted collisional excitation and dielectronic recombination rates of the strongest emission lines. We further investigate and compare the sensitivity of the derived physical parameters to the astrophysical source modeling and instrumental effects. The Hitomi results show that accurate atomic data and models are as important as the astrophysical modeling and instrumental calibration aspects. Substantial updates of atomic databases and targeted laboratory measurements are needed to get the current data and models ready for the data from the next Hitomi-level mission.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10308 - Astronomy (including astrophysics,space science)
Result continuities
Project
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Continuities
S - Specificky vyzkum na vysokych skolach
Others
Publication year
2018
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN
ISSN
0004-6264
e-ISSN
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Volume of the periodical
70
Issue of the periodical within the volume
2
Country of publishing house
JP - JAPAN
Number of pages
48
Pages from-to
„12-1“-„12-48“
UT code for WoS article
000432287600004
EID of the result in the Scopus database
2-s2.0-85071749999