SIMBAD references

2019MNRAS.484L.141O - Mon. Not. R. Astron. Soc., 484, L141-L146 (2019/March-3)

Role of intracluster supernovae in radio mini-haloes in galaxy clusters.

OMAR A.

Abstract (from CDS):

A possibility of generating a population of cosmic ray particles accelerated in supernovae type Ia (SNIa) remnants in the intracluster medium (ICM) is discussed. The presently constrained host-less SNIa rates in the clusters are found to be sufficient to fill a few hundred kpc region with cosmic ray electrons within their typical synchrotron lifetime of 100 Myr. The SNIa have already been considered potential sources of excess Fe abundance in cool-core clusters, distributed heating and turbulence in ICM. A good fraction of total radio power from mini-haloes can be sourced from the SNIa energy deposited in the ICM with required energy conversion efficiency <=1 per cent. The radio power estimated from low Mach-number shock acceleration in SNIa remnants is consistent with the observations within the uncertainties in the estimates. Some observational properties of the radio mini-haloes are broadly consistent with the SNIa scenario. It is also speculated that radio powers and possibly detections of mini-haloes are linked to star formation and merger histories of the clusters.

Abstract Copyright: © 2019 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): supernovae: general - cosmic rays - galaxies: clusters: intracluster medium - radio continuum: general

Simbad objects: 3

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2020.09.19-19:50:55

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