Some Active Galactic Nuclei as Cosmological Probes

Details Some Active Galactic Nuclei as Cosmological Probes Some Active Galactic Nuclei as Cosmological Probes

Nov 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995ssrv...74..475k&link_type=abstract

Space Science Reviews, Volume 74, Issue 3-4, pp. 475-479

Mathematics

Logic

3

Agn, Cosmological Parameters, Hubble Constant

Scientific paper

A method of using AGNs as cosmological probes and some recent results are discussed. The method is based on fitting the Hedgehog model to observations of spectra, structure and polarization of AGN radio emission and time variations of the observed quantities. If red shifts of selected AGNs are known, extragalactic distances, the Hubble constant and the deceleration parameter of the Universe can be measured using only radio observations. Recent results may give new strong arguments for the basic model to be in agreement with observations of variable spectra and structure of many AGNs, and may allow preliminary selection of AGNs for further use.

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