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The low-frequency structure of powerful radio sources and limits to departures from equipartition

Scott, M. A. and Readhead, A. C. S. (1977) The low-frequency structure of powerful radio sources and limits to departures from equipartition. Monthly Notices of the Royal Astronomical Society, 180 (4). pp. 539-550. ISSN 0035-8711. https://resolver.caltech.edu/CaltechAUTHORS:20200601-143024161

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Abstract

Recent interplanetary scintillation and spectral data have been combined to derive information about source structures at frequencies below 100 MHz. For an appreciable fraction of sources there is evidence of extended components which are prominent at low frequencies but which have not been detected in higher frequency interferometric observations. Sources having low-frequency spectral turnovers are studied in detail and in several cases it is shown that the total energy is within a factor 30 of the energy of equipartition between the particles and magnetic fields. In no case is there conclusive evidence of departure from equipartition.


Item Type:Article
Related URLs:
URLURL TypeDescription
https://doi.org/10.1093/mnras/180.4.539DOIArticle
https://ui.adsabs.harvard.edu/abs/1977MNRAS.180..539S/abstractADSArticle
ORCID:
AuthorORCID
Readhead, A. C. S.0000-0001-9152-961X
Additional Information:© 1977 Royal Astronomical Society. Provided by the NASA Astrophysics Data System. Received 1977 February 4. We thank Professor Sir Martin Ryle for stimulating discussions which led to this study, and Ors Longair, Scheuer and Shakeshaft for their active interest and helpful suggestions. ACSR gratefully acknowledges his debt to the Royal Society for a research fellowship supported by the Weir Foundation, and MAS acknowledges the receipt of a Science Research Council Studentship.
Funders:
Funding AgencyGrant Number
Royal SocietyUNSPECIFIED
Weir FoundationUNSPECIFIED
Science Research Council (SRC)UNSPECIFIED
Issue or Number:4
Record Number:CaltechAUTHORS:20200601-143024161
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20200601-143024161
Official Citation:M. A. Scott, A. C. S. Readhead, The low-frequency structure of powerful radio sources and limits to departures from equipartition, Monthly Notices of the Royal Astronomical Society, Volume 180, Issue 4, October 1977, Pages 539–550, https://doi.org/10.1093/mnras/180.4.539
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:103609
Collection:CaltechAUTHORS
Deposited By: George Porter
Deposited On:02 Jun 2020 14:04
Last Modified:02 Jun 2020 14:04

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