Substructures associated with the sloshing cold front in the
Perseus cluster

J 2019

Substructures associated with the sloshing cold front in the Perseus cluster

ICHINOHE, Y., A. SIMIONESCU, Norbert WERNER, A. C. FABIAN, T. TAKAHASHI et. al.

Základní údaje

Originální název

Substructures associated with the sloshing cold front in the Perseus cluster

Autoři

ICHINOHE, Y. (392 Japonsko), A. SIMIONESCU (642 Rumunsko), Norbert WERNER (703 Slovensko, garant, domácí), A. C. FABIAN (826 Velká Británie a Severní Irsko) a T. TAKAHASHI (392 Japonsko)

Vydání

Monthly Notices of the Royal Astronomical Society, Oxford, OXFORD UNIV PRESS, 2019, 0035-8711

Další údaje

Jazyk

angličtina

Typ výsledku

Článek v odborném periodiku

Obor

10308 Astronomy

Stát vydavatele

Velká Británie a Severní Irsko

Utajení

není předmětem státního či obchodního tajemství

Odkazy

Full Text URL

Impakt faktor

Impact factor: 5.357

Kód RIV

RIV/00216224:14310/19:00109411

Organizační jednotka

Přírodovědecká fakulta

DOI

http://dx.doi.org/10.1093/mnras/sty3257

UT WoS

000462258200026

Klíčová slova anglicky

galaxies: clusters: individual: the Perseus cluster; galaxies: clusters: intracluster medium; X-rays: galaxies: clusters

Štítky

rivok

Příznaky

Mezinárodní význam, Recenzováno

Změněno: 10. 11. 2022 12:15, Mgr. Marie Šípková, DiS.

Anotace

V originále

X-ray substructures in clusters of galaxies provide indirect clues about the microphysical properties of the intracluster medium (ICM), which are still not very well known. In order to investigate X-ray substructures in detail, we studied archival similar to 1 Msec Chandra data of the core of the Perseus cluster, focusing on the substructures associated with the sloshing cold front. In the east half of the cold front, we found a Kelvin-Helmholtz instability (KHI) layer candidate. The measured width-to-azimuthal extension ratio and the thermodynamic properties are all consistent with it being a KHI layer currently developing along the sloshing cold front. We found a thermal pressure deficit of the order of 10(-2) keV cm(-3) at the KHI layer. Assuming that turbulent pressure fully supports the pressure deficit, we estimated the turbulent strength at several hundred km s(-1), which translates into the turbulent heating rate of Q(turb) similar to 10(-26) erg cm(-3) s(-1). This value agrees within an order of magnitude with the previous estimation derived from the surface brightness fluctuations, and can balance the radiative cooling at this radius. In the west half of the cold front, we found feather-like structures which are similar to the structures observed in recent numerical simulations of the gas sloshing of magnetized plasma. Their thermodynamic properties are consistent with one of the feathers being a projected gas depletion layer induced by the amplified magnetic field whose strength is B similar to 30 mu G.

Citovat

ICHINOHE, Y., A. SIMIONESCU, Norbert WERNER, A. C. FABIAN a T. TAKAHASHI. Substructures associated with the sloshing cold front in the Perseus cluster. Monthly Notices of the Royal Astronomical Society. Oxford: OXFORD UNIV PRESS, 2019, roč. 483, č. 2, s. 1744-1753. ISSN 0035-8711. Dostupné z: https://dx.doi.org/10.1093/mnras/sty3257.

@article{1517598,
   author = {Ichinohe, Y. and Simionescu, A. and Werner, Norbert and Fabian, A. C. and Takahashi, T.},
   article_location = {Oxford},
   article_number = {2},
   doi = {http://dx.doi.org/10.1093/mnras/sty3257},
   keywords = {galaxies: clusters: individual: the Perseus cluster; galaxies: clusters: intracluster medium; X-rays: galaxies: clusters},
   language = {eng},
   issn = {0035-8711},
   journal = {Monthly Notices of the Royal Astronomical Society},
   title = {Substructures associated with the sloshing cold front in the Perseus cluster},
   url = {https://academic.oup.com/mnras/article-abstract/483/2/1744/5222665?redirectedFrom=fulltext},
   volume = {483},
   year = {2019}
}

TY  - JOUR
ID  - 1517598
AU  - Ichinohe, Y. - Simionescu, A. - Werner, Norbert - Fabian, A. C. - Takahashi, T.
PY  - 2019
TI  - Substructures associated with the sloshing cold front in the Perseus cluster
JF  - Monthly Notices of the Royal Astronomical Society
VL  - 483
IS  - 2
SP  - 1744-1753
EP  - 1744-1753
PB  - OXFORD UNIV PRESS
SN  - 00358711
KW  - galaxies: clusters: individual: the Perseus cluster
KW  - galaxies: clusters: intracluster medium
KW  - X-rays: galaxies: clusters
UR  - https://academic.oup.com/mnras/article-abstract/483/2/1744/5222665?redirectedFrom=fulltext
N2  - X-ray substructures in clusters of galaxies provide indirect clues about the microphysical properties of the intracluster medium (ICM), which are still not very well known. In order to investigate X-ray substructures in detail, we studied archival similar to 1 Msec Chandra data of the core of the Perseus cluster, focusing on the substructures associated with the sloshing cold front. In the east half of the cold front, we found a Kelvin-Helmholtz instability (KHI) layer candidate. The measured width-to-azimuthal extension ratio and the thermodynamic properties are all consistent with it being a KHI layer currently developing along the sloshing cold front. We found a thermal pressure deficit of the order of 10(-2) keV cm(-3) at the KHI layer. Assuming that turbulent pressure fully supports the pressure deficit, we estimated the turbulent strength at several hundred km s(-1), which translates into the turbulent heating rate of Q(turb) similar to 10(-26) erg cm(-3) s(-1). This value agrees within an order of magnitude with the previous estimation derived from the surface brightness fluctuations, and can balance the radiative cooling at this radius. In the west half of the cold front, we found feather-like structures which are similar to the structures observed in recent numerical simulations of the gas sloshing of magnetized plasma. Their thermodynamic properties are consistent with one of the feathers being a projected gas depletion layer induced by the amplified magnetic field whose strength is B similar to 30 mu G.
ER  -

ICHINOHE, Y., A. SIMIONESCU, Norbert WERNER, A. C. FABIAN a T. TAKAHASHI. Substructures associated with the sloshing cold front in the Perseus cluster. \textit{Monthly Notices of the Royal Astronomical Society}. Oxford: OXFORD UNIV PRESS, 2019, roč.~483, č.~2, s.~1744-1753. ISSN~0035-8711. Dostupné z: https://dx.doi.org/10.1093/mnras/sty3257.

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