Vlba Monitoring of the Qso 3c 345
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چکیده
منابع مشابه
Quasi - Periodic Changes in the Parsec - Scale Jet of 3 C 345
We have observed the QSO 3C 345 with VSOP at 1.6 GHz and 5 GHz and with the VLBA at 22 GHz and 43 GHz, with 24 epochs in total, from 1997.40 to 1999.69. This study, combined with previous observations, reveals periodic changes in the parsec-scale jet. This quasi-periodicity can be found in the initial position angles, the trajectories and the flux density evolution of the jet components, with a...
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The formation of relativistic jets in Active Galactic Nuclei (AGN) is related to accretion onto their central supermassive black holes, and magnetic (B) fields are believed to play a central role in launching, collimating, and accelerating the jet streams from very compact regions out to kiloparsec scales. We present results of Faraday rotation studies based on Very Long Baseline Array (VLBA) d...
متن کاملThe quasar 3 C 345 at the highest resolution with mm - and space - VLBI
The quasar 3C 345 is one of the best examples of extra-galactic jet with superluminal components moving on helical paths. To get better constraints on the jet physics, we have imaged the source at the highest possible resolution, using mm-VLBI and space-VLBI observations. We observed 3C 345 at 5 different epochs so far (1 epoch with 3-mm ground VLBI, and 4 epochs with space VLBI at 6 cm and 18 ...
متن کامل/ 99 02 09 3 v 1 5 F eb 1 99 9 Multiband polarimetric and total intensity imaging of 3 C 345
We monitored the superluminal QSO 3C 345 at three epochs during a one-year We imaged the radio source both in total and in polarized intensity. In the images at 5 and 8.4 GHz, the jet emission is traced up to 20 milliarcseconds (mas) from the jet core. In the 15 and 22 GHz images, we identify several enhanced emission regions moving at apparent speeds of 5c. Images of the linear polarized emiss...
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High resolution studies of circular polarization allow us see where it arises in a jet, study its local fractional level and spectrum, and compare these results to local measures of linear polarization and Faraday rotation. Here we not only review past results from Very Long Baseline Array (VLBA) circular polarization studies, but we also present preliminary new results on two quasars. In the c...
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