2001A&A...366...26E


C.D.S. - SIMBAD4 rel 1.7 - 2020.12.03CET12:57:55

2001A&A...366...26E - Astronomy and Astrophysics, volume 366, 26-34 (2001/1-4)

Reviving fossil radio plasma in clusters of galaxies by adiabatic compression in environmental shock waves.

ENSSLIN T.A. and GOPAL-KRISHNA

Abstract (from CDS):

We give for a plasma with a history of several expansion and contraction phases an analytical model of the evolution of a contained relativistic electron population under synchrotron, inverse Compton and adiabatic energy losses or gains. This is applied to different scenarios for evolution of radio plasma inside the cocoons of radio galaxies, after the activity of the central engine has ceased. It is demonstrated that fossil radio plasma with an age of even up to 2Gyr can be revived by compression in a shock wave of large-scale structure formation, caused during the merging events of galaxy clusters, or by the accretion onto galaxy clusters. We argue, that this is a highly plausible explanation for the observed cluster radio relics, which are the regions of diffuse radio emission found in clusters of galaxies, without any likely parent radio galaxy seen nearby. An implication of this model is the existence of a population of diffuse, ultra-steep spectrum, very low frequency radio sources located inside and possibly outside of clusters of galaxies, tracing the revival of aged fossil radio plasma by the shock waves associated with large-scale structure formation.

Abstract Copyright:

Journal keyword(s): acceleration of particles - shock waves - galaxies: intergalactic medium - galaxies: active - galaxies: clusters: general - radio continuum: general

Simbad objects: 10

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Number of rows : 10

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 NVSS J004129-092240 Rad 00 41 30.2 -09 22 23           ~ 35 0
2 ACO 85 ClG 00 41 37.8 -09 20 33           ~ 797 0
3 ACO 1367 ClG 11 44 44.6 +19 41 59           ~ 1002 1
4 M 87 BiC 12 30 49.42338230 +12 23 28.0438581 10.16 9.59 8.63   7.49 ~ 6301 3
5 NGC 4789 GiG 12 54 19.016 +27 04 04.87   13.12 12.10     ~ 120 2
6 NAME Coma Relic Rad 12 55 +27.2           ~ 53 0
7 ACO 1656 ClG 12 59 48.7 +27 58 50           ~ 4288 2
8 ACO 2256 ClG 17 03 43.5 +78 43 03           ~ 835 1
9 MOST 2006-565 Rad 20 10 19.1 -56 27 03           ~ 2 0
10 PKS 2006-565 Rad 20 10 29.5 -56 26 37           ~ 15 0

    Equat.    Gal    SGal    Ecl

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2020.12.03-12:57:55

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