VLBI observations of two quasars at 1.3 cm.

Details VLBI observations of two quasars at 1.3 cm. VLBI observations of two quasars at 1.3 cm.

Dec 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999pyuno......298s&link_type=abstract

Publications of the Yunnan Observatory, Suppl. 1999, p. 298 - 303

Computer Science

Quasars: Vlb Interferometry, Quasars: Brightness Distribution

Scientific paper

The quasars, 0748+126 and 2251+158 (3C 454.3), have been observed at 1.3 cm by using a global VLBI network. The authors have obtained the images of the quasars with a resolution higher than 0″001. The brightness distribution is revealed in the nuclear region of the quasars. The radio emisson FWHM from 0748+126 is 0.61×0.27 mas. 2251+158 shows a nucleus-jet structure, and the nuclear region is elongated in the direction PA = -130°. The quasar can be fitted with 4 Gaussian components. The most west and east components are separated by 0.8 mas (3 pc). The integrated flux density in the nuclear region is 6.138 Jy. The most east component shows the highest brightness, and its flux is ≡4.11 Jy (in 67% of the total detected flux), concentrated in the area of 0.16×0.01 mas. This causes the brightness temperature up to 2.6×1012K.

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