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

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F20%3A00116237" target="_blank" >RIV/00216224:14310/20:00116237 - isvavai.cz</a>

Result on the web

<a href="https://ui.adsabs.harvard.edu/abs/2020MNRAS.495.5014B/abstract" target="_blank" >https://ui.adsabs.harvard.edu/abs/2020MNRAS.495.5014B/abstract</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1093/mnras/staa1492" target="_blank" >10.1093/mnras/staa1492</a>

Result language

angličtina

Original language name

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

Original language description

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.

Czech name

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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

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OECD FORD branch

10308 - Astronomy (including astrophysics,space science)

Project

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Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2020

Confidentiality

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

Name of the periodical

Monthly Notices of the Royal Astronomical Society

ISSN

0035-8711

e-ISSN

—

Volume of the periodical

495

Issue of the periodical within the volume

4

Country of publishing house

GB - UNITED KINGDOM

Number of pages

13

Pages from-to

5014-5026

UT code for WoS article

000546679500105

EID of the result in the Scopus database

2-s2.0-85097365023