Polarized flux density synthesis and observations of the long-time variability (evolution) of extragalactic objects

Details Polarized flux density synthesis and observations of the long-time variability (evolution) of extragalactic objects Polarized flux density synthesis and observations of the long-time variability (evolution) of extragalactic objects

Feb 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991azh....68...30s&link_type=abstract

Astronomicheskii Zhurnal (ISSN 0004-6299), vol. 68, Jan.-Feb. 1991, p. 30-41. In Russian.

Mathematics

Logic

3

Extraterrestrial Radiation, Intergalactic Media, Polarization Characteristics, Radiant Flux Density, Halos, Light Scattering, Red Shift, Signal To Noise Ratios, Variability

Scientific paper

A method of polarized flux density synthesis for the observation of extended emission sources with a centrosymmetric polarization pattern is presented. It is based on the optimal polarization-spatial filtering of their images and can simultaneously increase both the dynamic range and the signal-to-noise ratio of optically thin scattered halos around compact emission sources. The feasibility of using such a synthesis in the search for cosmological halos (light echos of high-redshift QSOs and AGNs) on the background of intergalactic electron gas and for observations of their past luminosity evolution on the time scale of 10-million to 100-million years is investigated.

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