Diffuse radio emission in the Coma cluster of galaxies

Journal Article · Sun Jul 01 04:00:00 EDT 1979 · Astron. J.; (United States)

DOI:https://doi.org/10.1086/112497· OSTI ID:6094197

Hanisch, R J; Matthews, T A; Davis, M M

Observations of the Coma cluster of galaxies (Abell 1656) have been made at 430 MHz with the 300-m radio telescope of the Arecibo Observatory. An area of sky approximately two degrees square surrounding the cluster center has been mapped. After the observed map has been corrected for the emission due to known point sources, the presence of a diffuse component with a maximum visible extent of 45' +- 5' arc (20' +- 5' arc to half maximum) and integrated flux density 4.5 +- 1.0 Jy is confirmed. The observations indicate that if the relativisitic electrons have diffused away from the central cluster radio galaxies, the bulk diffusion speed must be of the order of or greater than the ion sound speed and is much greater than the Alfven velocity.

• Research Organization: Astronomy Program, University of Maryland, College Park, Maryland 20742
• OSTI ID: 6094197
• Journal Information: Astron. J.; (United States), Journal Name: Astron. J.; (United States) Vol. 84:7; ISSN ANJOA
• Country of Publication: United States
• Language: English

Related Subjects

640103* -- Astrophysics & Cosmology-- Quasi-Stellar
Radio
& X-Ray Sources-- (-1987)
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ASTRONOMY
COSMIC RADIO SOURCES
ELECTROMAGNETIC RADIATION
EMISSION SPECTRA
FLUX DENSITY
FREQUENCY RANGE
GALAXIES
GALAXY CLUSTERS
MHZ RANGE
MHZ RANGE 100-1000
RADIATIONS
RADIO GALAXIES
RADIOASTRONOMY
RADIOWAVE RADIATION
SPECTRA