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http://hdl.handle.net/2289/2221
Title: | Helical jet in the gravitationally lensed blazar PKS1830-211 |
Authors: | Nair, Sunita Garrett, M.A. |
Keywords: | Gravitational lensing Galaxies: active |
Issue Date: | Oct-2005 |
Publisher: | Blackwell Publishing for the Royal Astronomical Society |
Citation: | Monthly Notices of the Royal Astronomical Society, 2005, Vol.362, Issue 4, p1157-1166. |
Abstract: | Recent radio very long baseline interferometry observations of the complex gravitationally lensed system PKS 1830-211 have thrown up some questions with regard to the processes occurring at the heart of the blazar source at a redshift of 2.51, which is viewed almost straight down the jet axis. This work links, by a model of a helical jet tracked by ballistically ejected plasmons from a precessing nozzle, observations on the scale of tens of microarcseconds to those on the scale of milliarcseconds. An observed jet precession period of 1.08 yr is inferred from the model, translating to an intrinsic period of 30.8 yr for a source at redshift zs= 2.51 and an assumed jet bulk velocity β of 0.99c. This fits well with the picture of the active galactic nucleus hosting a binary black hole system at its centre, with the jet emitted by one member of the system and the precession as being a result of its orbital motion around its companion. |
Description: | Restricted Access. An open access version is available at arXiv.org.(one of the alternative locations) |
URI: | http://hdl.handle.net/2289/2221 |
ISSN: | 0035-8711 |
Alternative Location: | http://arxiv.org/abs/astro-ph/0507015 http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2005MNRAS.362.1157N http://dx.doi.org/10.1111/j.1365-2966.2005.09355.x |
Copyright: | (2005) Blackwell Publishing for the Royal Astronomical Society |
Appears in Collections: | Research Papers (A&A) |
Files in This Item:
File | Description | Size | Format | |
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2005MNRAS362p1157.pdf Restricted Access | Restricted Access | 233.56 kB | Adobe PDF | View/Open Request a copy |
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