NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Low-frequency radio observations of poor clusters of galaxiesObservations have been made at the Clark Lake Radio Observatory of 16 poor clusters of galaxies at 34.3 MHz. Four of the poor clusters were detected at flux densities greater than 20 Jy. The spectra of the four detected clusters are all rather steep. Two of the detected clusters, AWM 4 and AWM 5, are also known to be X-ray sources. The possibility that the X-ray-emitting gas is heated by Coulomb interactions with the relativistic electrons responsible for the radio emission is investigated, and it is found that the observed X-ray luminosities can be accounted for if the electron energy spectrum extends to very low energies (gamma approximately 1-10). Collective plasma effects may increase the heating efficiency and eliminate the need to extrapolate the electron energy spectrum to such low values.
Document ID
19810058056
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Hanisch, R. J.
(Maryland, University College Park, MD, United States)
White, R. A.
(NASA Goddard Space Flight Center Greenbelt, MD; National Radio Astronomy Observatory, Charlottesville, VA, United States)
Date Acquired
August 11, 2013
Publication Date
June 1, 1981
Publication Information
Publication: Astronomical Journal
Volume: 86
Subject Category
Astrophysics
Accession Number
81A42460
Distribution Limits
Public
Copyright
Other

Available Downloads

There are no available downloads for this record.
No Preview Available