Astronomy and Astrophysics – Astrophysics
Scientific paper
2008-03-07
Astronomy and Astrophysics
Astrophysics
Accepted to ApJ, 20 pages, 8 figures
Scientific paper
10.1086/588514
A detailed analysis of the evolution of the properties of core-jet systems within the VLBA Imaging and Polarimetry Survey (VIPS) is presented. We find a power-law relationship between jet intensity and width that suggests for the typical jet, little if any energy is lost as it moves away from its core. Using VLA images at 1.5 GHz, we have found evidence that parsec-scale jets tend to be aligned with the the direction of emission on kiloparsec scales. We also found that this alignment improves as the jets move farther from their cores on projected scales as small as ~50-100 pc. This suggests that realignment of jets on these projected scales is relatively common. We typically find a modest amount of bending (a change in jet position angle of ~5 deg.) on these scales, suggesting that this realignment may typically occur relatively gradually.
Blanford R. D.
Helmboldt Joseph F.
Taylor Greg B.
Walker Robert Craig
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