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Studies of the Fine Structure of the Object 1803+784.
- Source :
-
Astronomy Letters . Jan2001, Vol. 27 Issue 1, p1. 14p. - Publication Year :
- 2001
-
Abstract
- We have investigated the fine structure of the object 1803+784 at a wavelength of 18 cm with an angular resolution of ∼0.5 mas. The structure consists of a core (injector) and a jet. The angle of the relativistic plasma outflow is equal to the angle of a conical diverging helix—the trajectory of compact components, suggesting a similar shape of the jet. The helical structure and the curvature of the jet axis are assumed to be determined by rapid and long-period precession of the rotation axis. The core radio emission at 18 cm is attenuated by absorption in the ambient ionized medium (cocoon wall) by >25 db. The bright compact component is the nearby part of the jet extending outside the dense part of the screen. Ionization variations in the medium cause low-frequency radio variability. Screen parameters are estimated. [ABSTRACT FROM AUTHOR]
- Subjects :
- *ACTIVE galactic nuclei
*RELATIVISTIC astrophysics
*ATMOSPHERIC ionization
Subjects
Details
- Language :
- English
- ISSN :
- 10637737
- Volume :
- 27
- Issue :
- 1
- Database :
- Academic Search Index
- Journal :
- Astronomy Letters
- Publication Type :
- Academic Journal
- Accession number :
- 7288568
- Full Text :
- https://doi.org/10.1134/1.1336856