Precessing Jet in the High-Redshift Blazar J0017 8135Reportar como inadecuado


Precessing Jet in the High-Redshift Blazar J0017 8135


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1

Department of Physics of Complex Systems, Eötvös Loránd University, Pázmány P. sétány 1-A, Budapest H-1117, Hungary

2

FÖMI Satellite Geodetic Observatory, P.O. Box 585, Budapest H-1592, Hungary





*

Author to whom correspondence should be addressed.



Academic Editors: Jose L. Gómez, Alan P. Marscher and Svetlana G. Jorstad

Abstract The prominent flat-spectrum radio quasar J0017+8135 S5 0014+81 at z = 3.366 is one of the most luminous active galactic nuclei AGN known. Its milliarcsecond-scale radio jet structure has been studied with very long baseline interferometry VLBI since the 1980s. The quasar was selected as one of the original defining objects of the International Celestial Reference Frame, but left out from its current second realization ICRF2 because of systematic long-term positional variations. Here we analyse archival 8.6- and 2.3-GHz VLBI imaging data collected at nearly 100 different epochs during more than 20 years, to obtain information about the kinematics of jet components. Because of the cosmological time dilation, extensive VLBI monitoring data are essential to reveal changes in the jet structure of high-redshift AGN. In the case of J0017+8135, the data can be described with a simple kinematic model of jet precession with a 12-year periodicity in the observer’s frame. View Full-Text

Keywords: blazars; jets; very long baseline interferometry; precession; high redshift blazars; jets; very long baseline interferometry; precession; high redshift





Autor: Kristóf Rozgonyi 1 and Sándor Frey 2,*

Fuente: http://mdpi.com/



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