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@article{1556839,
author = {Mernier, F. and Werner, Norbert and Bagchi, J. and Simionescu, A. and Bohringer, H. and Allen, S.W. and Jacob, J.},
article_location = {Oxford},
article_number = {4},
doi = {http://dx.doi.org/10.1093/mnras/stz1228},
keywords = {magnetic fields; galaxies: active; galaxies: clusters: individual: MRC 0116+111; galaxies: clusters: intracluster medium; X-rays: galaxies: clusters},
language = {eng},
issn = {0035-8711},
journal = {Monthly Notices of the Royal Astronomical Society},
title = {Magnetic fields and extraordinarily bright radio emission in the X-ray faint galaxy group MRC 0116+111},
url = {https://arxiv.org/pdf/1902.09560.pdf},
volume = {486},
year = {2019}
}
TY - JOUR
ID - 1556839
AU - Mernier, F. - Werner, Norbert - Bagchi, J. - Simionescu, A. - Bohringer, H. - Allen, S.W. - Jacob, J.
PY - 2019
TI - Magnetic fields and extraordinarily bright radio emission in the X-ray faint galaxy group MRC 0116+111
JF - Monthly Notices of the Royal Astronomical Society
VL - 486
IS - 4
SP - 5430-5440
EP - 5430-5440
PB - OXFORD UNIV PRESS
SN - 00358711
KW - magnetic fields
KW - galaxies: active
KW - galaxies: clusters: individual: MRC 0116+111
KW - galaxies: clusters: intracluster medium
KW - X-rays: galaxies: clusters
UR - https://arxiv.org/pdf/1902.09560.pdf
N2 - MRC 0116 111 is a nearby (z = 0.132) poor galaxy group, which was previously known for exhibiting a bright diffuse radio emission with no central point-like source, presumably related to a past activity of the active galactic nucleus (AGN) in its central cif.) galaxy. Here, we present an X-ray observation (similar to 30 ks of cleaned XM M Newtonll TIC exposure) of this system, allowing us for the first time a detailed comparison between the thermal and non-thermal components of its intragroup medium (1GrM). Remarkably, we find that the radio-lo-X-ray luminosity ratio is among the highest ever observed for a diffuse extragalactic source so far, while the extent of the observed radio emission is about three limes larger than its observed soft: X-ray emission. Although powerful AGN activity may have disturbed the dynamics of the thermal 1GrM in the form of turbulence, possibly re-energizing part of the relativistic electron population, the gas properties lie within the 1.0 scaling relation established previously for other groups. The upper limit we rind for the non-thermal inverse-Compton X-ray emission translates into a surprisingly high lower limit for the volume-averaged magnetic field of the group (>4.3 G). Finally, we discuss some interesting properties of a distant (z similar or equal to 0.525) galaxy cluster serendipitously discovered in our EPIC field of view.
ER -
MERNIER, F., Norbert WERNER, J. BAGCHI, A. SIMIONESCU, H. BOHRINGER, S.W. ALLEN a J. JACOB. Magnetic fields and extraordinarily bright radio emission in the X-ray faint galaxy group MRC 0116+111. \textit{Monthly Notices of the Royal Astronomical Society}. Oxford: OXFORD UNIV PRESS, 2019, roč.~486, č.~4, s.~5430-5440. ISSN~0035-8711. Dostupné z: https://dx.doi.org/10.1093/mnras/stz1228.
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