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• W3100517871 endingPage "70" @default.
• W3100517871 startingPage "70" @default.
• W3100517871 abstract "Radio minihalos are diffuse synchrotron sources of unknown origin found in the cool cores of some galaxy clusters. We use GMRT and VLA data to expand the sample of minihalos by reporting three new minihalo detections (A 2667, A 907 and PSZ1 G139.61+24.20) and confirming minihalos in five clusters (MACS J0159.8-0849, MACS J0329.6-0211, RXC J2129.6+0005, AS 780 and A 3444). With these new detections and confirmations, the sample now stands at 23, the largest sample to date. For consistency, we also reanalyze archival VLA 1.4 GHz observations of 7 known minihalos. We revisit possible correlations between the non-thermal emission and the thermal properties of their cluster hosts. Consistently with our earlier findings from a smaller sample, we find no strong relation between the minihalo radio luminosity and the total cluster mass. Instead, we find a strong positive correlation between the minihalo radio power and X-ray bolometric luminosity of the cool core (r<70 kpc). This supplements our earlier result that most if not all cool cores in massive clusters contain a minihalo. Comparison of radio and Chandra X-ray images indicates that the minihalo emission is typically confined by concentric sloshing cold fronts in the cores of most of our clusters, supporting the hypothesis that minihalos arise from electron reacceleration by turbulence caused by core gas sloshing. Taken together, our findings suggest that the origin of minihalos should be closely related to the properties of thermal plasma in cluster cool cores." @default.
• W3100517871 created "2020-11-23" @default.
• W3100517871 creator A5017240359 @default.
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• W3100517871 creator A5064465769 @default.
• W3100517871 creator A5066289165 @default.
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• W3100517871 date "2019-07-26" @default.
• W3100517871 modified "2023-09-30" @default.
• W3100517871 title "Expanding the Sample of Radio Minihalos in Galaxy Clusters" @default.
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• W3100517871 doi "https://doi.org/10.3847/1538-4357/ab29f1" @default.
• W3100517871 hasPublicationYear "2019" @default.
• W3100517871 type Work @default.
• W3100517871 sameAs 3100517871 @default.

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