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@article{2361460,
author = {Mernier, F. and Werner, Norbert and Bagchi, J. and GendronandMarsolais, M.andL. and GopalandKrishna, GopalandKrishna and Guainazzi, M. and RichardandLaferriere, A. and Shimwell, T. W. and Simionescu, A.},
article_number = {4},
doi = {http://dx.doi.org/10.1093/mnras/stad2093},
keywords = {magnetic fields; galaxies: clusters: individual: MRC0116+111; galaxies: clusters: intracluster medium; X-rays: galaxies: clusters},
language = {eng},
issn = {0035-8711},
journal = {Monthly Notices of the Royal Astronomical Society},
title = {Discovery of inverse-Compton X-ray emission and estimate of the volume-averaged magnetic field in a galaxy group},
url = {https://doi.org/10.1093/mnras/stad2093},
volume = {524},
year = {2023}
}
TY - JOUR
ID - 2361460
AU - Mernier, F. - Werner, Norbert - Bagchi, J. - Gendron-Marsolais, M.-L. - Gopal-Krishna, Gopal-Krishna - Guainazzi, M. - Richard-Laferriere, A. - Shimwell, T. W. - Simionescu, A.
PY - 2023
TI - Discovery of inverse-Compton X-ray emission and estimate of the volume-averaged magnetic field in a galaxy group
JF - Monthly Notices of the Royal Astronomical Society
VL - 524
IS - 4
SP - 4939-4949
EP - 4939-4949
PB - Oxford University Press
SN - 00358711
KW - magnetic fields
KW - galaxies: clusters: individual: MRC0116+111
KW - galaxies: clusters: intracluster medium
KW - X-rays: galaxies: clusters
UR - https://doi.org/10.1093/mnras/stad2093
N2 - Observed in a significant fraction of clusters and groups of galaxies, diffuse radio synchrotron emission reveals the presence of relativistic electrons and magnetic fields permeating large scale systems of galaxies. Although, these non-thermal electrons are expected to upscatter cosmic microwave background photons up to hard X-ray energies, such inverse-Compton (IC) X-ray emission has so far not been unambiguously detected on cluster/group scales. Using deep, new proprietary XMM–Newton observations (∼200 ks of clean exposure), we report a 4.6 σ detection of extended IC X-ray emission in MRC 0116 +111, an extraordinary group of galaxies at z = 0.131. Assuming a spectral slope derived from low frequency radio data, the detection remains robust to systematic uncertainties. Together with low frequency radio data from the Giant Metrewave Radio Telescope (GMRT), this detection provides an estimate for the volume-averaged magnetic field of (1.9 ± 0.3) μG within the central part of the group. This value can serve as an anchor for studies of magnetic fields in the largest gravitationally bound systems in the Universe.
ER -
MERNIER, F., Norbert WERNER, J. BAGCHI, M.-L. GENDRON-MARSOLAIS, Gopal-Krishna GOPAL-KRISHNA, M. GUAINAZZI, A. RICHARD-LAFERRIERE, T. W. SHIMWELL a A. SIMIONESCU. Discovery of inverse-Compton X-ray emission and estimate of the volume-averaged magnetic field in a galaxy group. \textit{Monthly Notices of the Royal Astronomical Society}. Oxford University Press, 2023, roč.~524, č.~4, s.~4939-4949. ISSN~0035-8711. Dostupné z: https://dx.doi.org/10.1093/mnras/stad2093.
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