30.9 MHz observations of the radio halo in the coma cluster of galaxies

1989 ◽  
Vol 97 ◽  
pp. 1561 ◽  
Author(s):  
Patricia A. Henning

1990 ◽  
Vol 105 (8-9) ◽  
pp. 845-856
Author(s):  
Kwang-Tae Kim


1990 ◽  
Vol 140 ◽  
pp. 483-485
Author(s):  
K.-T. Kim ◽  
P. P. Kronberg

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.





1984 ◽  
Vol 305 (4) ◽  
pp. 175-185 ◽  
Author(s):  
F. W. Baier


2006 ◽  
Vol 459 (3) ◽  
pp. 679-692 ◽  
Author(s):  
C. Adami ◽  
R. Scheidegger ◽  
M. Ulmer ◽  
F. Durret ◽  
A. Mazure ◽  
...  




1990 ◽  
Vol 99 ◽  
pp. 1381 ◽  
Author(s):  
T. Venturi ◽  
G. Giovannini ◽  
L. Feretti


1990 ◽  
Vol 355 ◽  
pp. 29 ◽  
Author(s):  
K.-T. Kim ◽  
P. P. Kronberg ◽  
P. E. Dewdney ◽  
T. L. Landecker


2018 ◽  
Vol 618 ◽  
pp. A130 ◽  
Author(s):  
G. Gavazzi ◽  
G. Consolandi ◽  
M. L. Gutierrez ◽  
A. Boselli ◽  
M. Yoshida

We report the detection of Hα trails behind three new intermediate-mass irregular galaxies in the NW outskirts of the nearby cluster of galaxies Abell 1656 (Coma). Hints that these galaxies possess an extended component were found in earlier, deeper Hα observations carried out with the Subaru telescope. However the lack of a simultaneous r-band exposure, together with the presence of strong stellar ghosts in the Subaru images, prevented us from quantifying the detections. We therefore devoted one full night of Hα observation to each of the three galaxies using the San Pedro Martir 2.1 m telescope. One-sided tails of Hα emission of 10–20 kpc projected size were detected, suggesting an ongoing ram pressure stripping event. We added these 3 new sources of extended ionized gas to the 12 previously found, NGC 4848, and NGC 4921 whose ram pressure stripping is certified by HI asymmetry. This brings the number sources with Hα trails to 17 gaseous tails out of 27 (63%) late-type galaxies (LTG) members of the Coma cluster with direct evidence of ram pressure stripping. The 27 LTG galaxies, among these the 17 with extended Hα tails, have kinematic properties that are different from the rest of the early-type galaxy population of the core of the Coma cluster, as they deviate in the phase-space diagram |ΔV|/σ versus r/R200.



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