Spectrum variability study of radio sources in the 22 to 43 GHz range

Details Spectrum variability study of radio sources in the 22 to 43 GHz range Spectrum variability study of radio sources in the 22 to 43 GHz range

Dec 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990phdt........15b&link_type=abstract

Ph.D. Thesis Instituto de Pesquisas Espaciais, Sao Jose dos Campos (Brazil).

Other

Bl Lacertae Objects, Quasars, Stellar Spectra, Variability, Very Long Base Interferometry, Magnetic Flux, Mathematical Models, Shock Waves, Submillimeter Waves, Telescopes

Scientific paper

Researchers have observed several quasars, BL Lac objects and other sources like Cen A, Sgr A at 22 GHz and 43 GHz for ten years. The principal goal of this work is the study of the temporal and spectral variability of these objects. The researchers applied the shock wave model (Marscher and Gear, 1985) and the canonical model (Van der Laan, 1966: Pauliny-Toth, 1966; Jones, O'Dell and Stein, 1974). The researchers calculated the very long baseline interferometry (VBLI) position of the knots, the magnetic field intensity, and angular dimension of the sources. Simultaneous observations were made with the Swedish-ESO submillimeter telescope at 22, 43, 90 and 230 GHz. Simultaneous spectra are shown.

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