On the Depolarization of Discrete Radio Sources by Faraday Dispersion

Clicks: 1
ID: 301466
1966
Free PDF
Article Quality & Performance Metrics
Overall Quality
Not rated
Combines reader engagement with the AI quality analysis. This article has not been analysed, so there is no overall score — reader engagement is measured and shown alongside.
AI Quality Assessment
Not analyzed
Readership in this journal

Ranked #643 of 908 articles by views in monthly notices of the royal astronomical society

Most read Least read

Bar heights use a square-root scale. Only the 120 most-read articles are drawn; the journal has 908 in total.

Mint this article as an NFT
Not yet minted

Create a permanent, verifiable on-chain record of this article on the Scimatic Network. The NFT is held in your Journament account, and you can withdraw it to your own wallet at any time.

5 SUSD one-off · no wallet required
Sign in to mint
Abstract
A study is made of the implications of the recent polarization measurements for the structures of discrete radio sources and the source–observer media. Simple models of wavelength-dependent depolarizing mechanisms are investigated and it is found that most are incompatible with the observations of Gardner & Whiteoak. The models of internal Faraday dispersion predict a lower polarization at 30 cm than is observed. It is suggested that the depolarization of the Crab nebula is produced by Faraday rotation in the filamentary shell that surrounds the nebula. Such filaments could also exist in the outer regions of extragalactic sources. A complex number representation is used for the state of linear polarization and a Faraday dispersion function is defined to describe the distribution of polarized radiation with respect to Faraday depth. The persistence of polarization at 30 cm, after partial depolarization between 10 cm and 20 cm, implies that the radiation is spread over a large range of Faraday depths. The observed linearity of the plot of the angle of polarization against wavelength squared for most sources implies that it is justifiable to make an assumption which enables one to calculate the Faraday dispersion function of a source from the dependence of its polarization on wavelength. Estimates are given for upper limits to the densities of internal ionized gases in the sources for which we have polarization measurements.
Reference Key
openalex_W2057209307 Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Bob Burn
Journal monthly notices of the royal astronomical society
Year 1966
DOI
10.1093/mnras/133.1.67
URL
https://doi.org/10.1093/mnras/133.1.67
Keywords Keywords not found

Citations

No citations found. To add a citation, contact the admin at info@scimatic.org

Comments

No comments yet. Be the first to comment on this article.