Multi-Frequency Long-Term Radio Variability and the Milliarcsecond Structure of the High-Redshift Quasar OH 471

Details Multi-Frequency Long-Term Radio Variability and the Milliarcsecond Structure of the High-Redshift Quasar OH 471 Multi-Frequency Long-Term Radio Variability and the Milliarcsecond Structure of the High-Redshift Quasar OH 471

Dec 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aspc..360..149v&link_type=abstract

AGN Variability from X-Rays to Radio Waves ASP Conference Series, Vol. 360, Proceedings of the conference held 14-16 June, 2004

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Scientific paper

We study the possibly double-humped broad-band radio spectrum and milliarcsecond structure of the high-redshift radio-loud quasar OH 471. Results of our observations performed at the 22-m CrAO radio telescope, and at RATAN-600, as well as available VLBI data together with other published single-dish measurements in the frequency range 0.3-90 GHz for the period 1964-2003, are analyzed. The high-frequency component associated with the compact relativistic jet dominates the spectrum above 5 GHz. We discuss substantial changes in the quasar radio spectrum through the last 40 years spanned by the observations, as well as the characteristics of its very compact VLBI structure.

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