The mergers in Abell 2256: displaced gas and its connection to
the radio-emitting plasma

J 2020

The mergers in Abell 2256: displaced gas and its connection to the radio-emitting plasma

BREUER, Jean-Paul Bernhard; Norbert WERNER; F. MERNIER; T. MROCZKOWSKI; A. SIMIONESCU et al.

Základní údaje

Originální název

The mergers in Abell 2256: displaced gas and its connection to the radio-emitting plasma

Autoři

BREUER, Jean-Paul Bernhard; Norbert WERNER; F. MERNIER; T. MROCZKOWSKI; A. SIMIONESCU; T.E. CLARKE; J.A. ZUHONE a Mascolo L. DI

Vydání

Monthly Notices of the Royal Astronomical Society, WILEY, 2020, 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

URL, URL

Impakt faktor

Impact factor: 5.287

Označené pro přenos do RIV

Ano

Kód RIV

RIV/00216224:14310/20:00116237

Organizační jednotka

Přírodovědecká fakulta

Klíčová slova anglicky

galaxies: clusters: individual: Abell 2256; galaxies: clusters: intracluster medium; X-rays: galaxies: clusters

Štítky

14312040, rivok

Příznaky

Mezinárodní význam, Recenzováno

Změněno: 10. 11. 2022 11:52, Mgr. Marie Novosadová Šípková, DiS.

Anotace

V originále

We present the results of deep Chandra and XMM-Newton X-ray imaging and spatially resolved spectroscopy of Abell 2256, a nearby (z = 0.058) galaxy cluster experiencing multiple mergers and displaying a rich radio morphology dominated by a large relic. The X-ray data reveal three subclusters: (i) the 'main cluster'; (ii) the remnant of an older merger in the east of the cluster with an similar to 600 kpc-long tail; (iii) a bright, bullet-like, low-entropy infalling system, with a large line-of-sight velocity component. The low-entropy system displays a 250 kpc-long cold front with a break and an intriguing surface brightness decrement. Interestingly, the infalling gas is not co-spatial with bright galaxies and the radio-loud brightest cluster galaxy of the infalling group appears dissociated from the low-entropy plasma by similar to 50 kpc in projection, to the south of the eastern edge of the cold front. Assuming that the dark matter follows the galaxy distribution, we predict that it is also significantly offset from the low-entropy gas. Part of the low-frequency radio emission near the cold front might be revived by magnetic field amplification due to differential gas motions. Using analytical models and numerical simulations, we investigate the possibility that the supersonic infall of the subcluster generates a large-scale shock along our line of sight, which can be detected in the X-ray temperature map but is not associated with any clear features in the surface brightness distribution.

Citovat

BREUER, Jean-Paul Bernhard; Norbert WERNER; F. MERNIER; T. MROCZKOWSKI; A. SIMIONESCU; T.E. CLARKE; J.A. ZUHONE a Mascolo L. DI. The mergers in Abell 2256: displaced gas and its connection to the radio-emitting plasma. Monthly Notices of the Royal Astronomical Society. WILEY, 2020, roč. 495, č. 4, s. 5014-5026. ISSN 0035-8711. Dostupné z: https://doi.org/10.1093/mnras/staa1492.

@article{1674764,
   author = {Breuer, JeanandPaul Bernhard and Werner, Norbert and Mernier, F. and Mroczkowski, T. and Simionescu, A. and Clarke, T.E. and ZuHone, J.A. and Di, Mascolo L.},
   article_number = {4},
   doi = {https://doi.org/10.1093/mnras/staa1492},
   keywords = {galaxies: clusters: individual: Abell 2256; galaxies: clusters: intracluster medium; X-rays: galaxies: clusters},
   language = {eng},
   issn = {0035-8711},
   journal = {Monthly Notices of the Royal Astronomical Society},
   title = {The mergers in Abell 2256: displaced gas and its connection to the radio-emitting plasma},
   url = {https://academic.oup.com/mnras/article/495/4/5014/5849439},
   volume = {495},
   year = {2020}
}

TY  - JOUR
ID  - 1674764
AU  - Breuer, Jean-Paul Bernhard - Werner, Norbert - Mernier, F. - Mroczkowski, T. - Simionescu, A. - Clarke, T.E. - ZuHone, J.A. - Di, Mascolo L.
PY  - 2020
TI  - The mergers in Abell 2256: displaced gas and its connection to the radio-emitting plasma
JF  - Monthly Notices of the Royal Astronomical Society
VL  - 495
IS  - 4
SP  - 5014-5026
EP  - 5014-5026
PB  - WILEY
SN  - 00358711
KW  - galaxies: clusters: individual: Abell 2256
KW  - galaxies: clusters: intracluster medium
KW  - X-rays: galaxies: clusters
UR  - https://academic.oup.com/mnras/article/495/4/5014/5849439
N2  - We present the results of deep Chandra and XMM-Newton X-ray imaging and spatially resolved spectroscopy of Abell 2256, a nearby (z = 0.058) galaxy cluster experiencing multiple mergers and displaying a rich radio morphology dominated by a large relic. The X-ray data reveal three subclusters: (i) the 'main cluster'; (ii) the remnant of an older merger in the east of the cluster with an similar to 600 kpc-long tail; (iii) a bright, bullet-like, low-entropy infalling system, with a large line-of-sight velocity component. The low-entropy system displays a 250 kpc-long cold front with a break and an intriguing surface brightness decrement. Interestingly, the infalling gas is not co-spatial with bright galaxies and the radio-loud brightest cluster galaxy of the infalling group appears dissociated from the low-entropy plasma by similar to 50 kpc in projection, to the south of the eastern edge of the cold front. Assuming that the dark matter follows the galaxy distribution, we predict that it is also significantly offset from the low-entropy gas. Part of the low-frequency radio emission near the cold front might be revived by magnetic field amplification due to differential gas motions. Using analytical models and numerical simulations, we investigate the possibility that the supersonic infall of the subcluster generates a large-scale shock along our line of sight, which can be detected in the X-ray temperature map but is not associated with any clear features in the surface brightness distribution.
ER  -

BREUER, Jean-Paul Bernhard; Norbert WERNER; F. MERNIER; T. MROCZKOWSKI; A. SIMIONESCU; T.E. CLARKE; J.A. ZUHONE a Mascolo L. DI. The mergers in Abell 2256: displaced gas and its connection to the radio-emitting plasma. \textit{Monthly Notices of the Royal Astronomical Society}. WILEY, 2020, roč.~495, č.~4, s.~5014-5026. ISSN~0035-8711. Dostupné z: https://doi.org/10.1093/mnras/staa1492.

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