Atmospheric gas dynamics in the Perseus cluster observed 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%3A00103759" target="_blank" >RIV/00216224:14310/18:00103759 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1093/pasj/psx138" target="_blank" >http://dx.doi.org/10.1093/pasj/psx138</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1093/pasj/psx138" target="_blank" >10.1093/pasj/psx138</a>
Alternative languages
Result language
angličtina
Original language name
Atmospheric gas dynamics in the Perseus cluster observed with Hitomi
Original language description
Extending the earlier measurements reported in Hitomi collaboration (2016, Nature, 535, 117), we examine the atmospheric gas motions within the central 100 kpc of the Perseus cluster using observations obtained with the Hitomi satellite. After correcting for the point spread function of the telescope and using optically thin emission lines, we find that the line-of-sight velocity dispersion of the hot gas is remarkably low and mostly uniform. The velocity dispersion reaches a maxima of approximately 200 km s(-1) toward the central active galactic nucleus (AGN) and toward the AGN inflated northwestern "ghost" bubble. Elsewhere within the observed region, the velocity dispersion appears constant around 100 km s(-1). We also detect a velocity gradient with a 100 km s(-1) amplitude across the cluster core, consistent with large-scale sloshing of the core gas. If the observed gas motions are isotropic, the kinetic pressure support is less than 10% of the thermal pressure support in the cluster core. The well-resolved, optically thin emission lines have Gaussian shapes, indicating that the turbulent driving scale is likely below 100 kpc, which is consistent with the size of the AGN jet inflated bubbles. We also report the first measurement of the ion temperature in the intracluster medium, which we find to be consistent with the electron temperature. In addition, we present a new measurement of the redshift of the brightest cluster galaxy NGC 1275.
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
32
Pages from-to
1-32
UT code for WoS article
000432287600001
EID of the result in the Scopus database
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