The halo and magnetic field of the Coma cluster of galaxies

1990 ◽  
Vol 355 ◽  
pp. 29 ◽  
Author(s):  
K.-T. Kim ◽  
P. P. Kronberg ◽  
P. E. Dewdney ◽  
T. L. Landecker
Keyword(s):  
Magnetic Field ◽  
Coma Cluster ◽  
Cluster Of Galaxies

scholarly journals Electron Transport in the Coma Cluster

1996 ◽  
Vol 175 ◽  
pp. 339-340
Author(s):  
J.G. Kirk ◽  
P. Duffy ◽  
R.O. Dendy
Keyword(s):  
Magnetic Field ◽  
Electron Transport ◽  
Linear Dimension ◽  
Radio Galaxies ◽  
Central Position ◽  
Relativistic Electrons ◽  
Synchrotron Emission ◽  
Diffusive Transport ◽  
Coma Cluster ◽  
Cluster Of Galaxies

The inner regions of the Coma cluster of galaxies contain a source of diffuse synchrotron emission (‘Coma C’) which has a linear dimension of at least 500 kpc. There has been interest in the question of where the relativistic electrons responsible for this emission originate, and how they are transported through the intra-cluster medium (Tribble, 1993). It is widely thought that one or more of the radio galaxies in the centre of the cluster provides a likely source for particles which then diffuse out into the halo (Giovannini et al., 1993); a process which depends critically on the structure of this field in the intra-cluster medium. Recent observations of the emission from NGC4869 (Feretti et al., 1995), which occupies a central position in the Coma cluster, indicate the presence of a magnetic field which is both stronger (B ≈ 8μ G) and tangled on much shorter scales ≲ 1 kpc than had been thought previously (Kim et al., 1990). These new results suggest not only a shorter cooling time for energetic electrons, but also a slower rate of diffusive transport. In this paper we show the constraints that the new observations place on transport theories of the relativistic electrons.

A detailed measurement of the halo in the coma cluster of galaxies, and its magnetic field

1990 ◽  
Vol 50 (1-3) ◽  
pp. 7-18 ◽  
Author(s):  
P. P. Kronberg ◽  
K.-T. Kim
Keyword(s):  
Magnetic Field ◽  
Coma Cluster ◽  
Detailed Measurement ◽  
Cluster Of Galaxies

Evidence of a Large Scale Magnetic Field in the Coma - A1367 Supercluster

1990 ◽  
Vol 140 ◽  
pp. 492-494 ◽  
Author(s):  
G. Giovannini ◽  
K.-T. Kim ◽  
P. P. Kronberg ◽  
T. Venturi
Keyword(s):  
Magnetic Field ◽  
Large Scale ◽  
Galaxy Cluster ◽  
Coma Cluster ◽  
Rich Cluster ◽  
Cluster Of Galaxies ◽  
Large Scale Magnetic Field

The Coma cluster is a rich cluster of galaxies nested in an even larger supercluster of galaxies. The plane of the supercluster appears to be defined by the Coma cluster itself and another galaxy cluster, Abell 1367, that lies about 40 Mpc (H0 = 75 Mpc km−1s−1 (≡h75)) farther west (Tifft and Gregory 1976).

scholarly journals The Strength and Structure of the Intracluster Magnetic Field in the Coma Cluster of Galaxies

1990 ◽  
Vol 140 ◽  
pp. 483-485
Author(s):  
K.-T. Kim ◽  
P. P. Kronberg
Keyword(s):  
Magnetic Field ◽  
Dynamic Range ◽  
High Dynamic Range ◽  
Coma Cluster ◽  
Radio Halo ◽  
Cluster Of Galaxies ◽  
Probe Experiment ◽  
High Dynamic ◽  
Intracluster Gas ◽  
Gas Component

A new series of detailed observations of the Coma cluster of galaxies has been undertaken with the aim of better specifying the intracluster gas component throgh high dynamic range, combined-telescope observations of the radio halo emission from the cluster which detect both the cluster-scale and galaxy-scale emission. By combining these multi-frequency maps with a Faraday rotation probe experiment using cluster and background sources, and the published X-ray data, we have been able to estimate the intracluster magnetic field strength independently of the unusal assumption of equipartition. The result is approximately 2 microgauss and the tangling of the rms field occurs on an optical galaxy scale.

Deep low frequency image of Coma cluster of galaxies

2019 ◽  
Author(s):  
Dharam V Lal ◽  
C.H. Ishwara-Chandra
Keyword(s):  
Low Frequency ◽  
Coma Cluster ◽  
Cluster Of Galaxies

On the Structure of the Coma Cluster of Galaxies

1984 ◽  
Vol 305 (4) ◽  
pp. 175-185 ◽  
Author(s):  
F. W. Baier
Keyword(s):  
Coma Cluster ◽  
Cluster Of Galaxies

scholarly journals A deep wide survey of faint low surface brightness galaxies in the direction of the Coma cluster of galaxies

2006 ◽  
Vol 459 (3) ◽  
pp. 679-692 ◽  
Author(s):  
C. Adami ◽  
R. Scheidegger ◽  
M. Ulmer ◽  
F. Durret ◽  
A. Mazure ◽  
...  
Keyword(s):  
Surface Brightness ◽  
Coma Cluster ◽  
Cluster Of Galaxies ◽  
Low Surface Brightness ◽  
Low Surface Brightness Galaxies

A new stellar standard sequence in the coma cluster of galaxies. (preliminary report)

1978 ◽  
Vol 299 (3) ◽  
pp. 117-120 ◽  
Author(s):  
F. Börngen ◽  
N. Richter
Keyword(s):  
Preliminary Report ◽  
Coma Cluster ◽  
Standard Sequence ◽  
Cluster Of Galaxies
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