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arxiv: 1402.1577 · v3 · submitted 2014-02-07 · 🌌 astro-ph.GA · astro-ph.CO

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Probing Radio Emission in Seyfert Galaxies on Parsec- and Kiloparsec-scales

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classification 🌌 astro-ph.GA astro-ph.CO
keywords radiogalaxieslobesseyfertjetsbeenemissionkpc-scale
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Seyfert galaxies have traditionally been classified as radio-quiet active galactic nuclei. A proper consideration of the nuclear optical emission however proves that a majority of Seyferts are radio-loud. Kpc-scale radio lobes/bubbles are in fact revealed in sensitive observations at low radio frequencies of several Seyferts. Through the use of very long baseline interferometry, we have been able to determine the direction of the parsec-scale jets in some of these Seyfert galaxies. The misalignment between the parsec-scale jets and the kpc-scale lobes that is typically observed, is either suggestive of no connection between the two, or the presence of curved jets that power the radio lobes. In this context, we briefly discuss our new low radio frequency GMRT observations of two Seyfert galaxies with lobes.

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