<p>Is it possible for a Radio-loud object (eg., an FRI galaxy) to evolve into a Radio-quiet (eg., a Seyfert) source?</p>
<p>Also, can this happen via AGN restart? That is, have there been instances where the active nuclei in a Radio-loud object switches off, and then restarts as a weaker Radio-quiet source?</p>

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2021-01-05T13:31:18.390Z
I know a paper by Barišić et al. that concludes that massive, quiescent galaxies at z~1 will switch on a jet mode AGN (radio-loud) about once every Gyr, but not sure if they switch back to radio quiet or quasar mode: https://iopscience.iop.org/article/10.3847/1538-4357/aa8768/meta
theWrongAlice
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2021-01-06T04:25:27.610Z
Possible 2017 paper of interest: https://iopscience.iop.org/article/10.3847/1538-4357/aa745d/pdf
Joseph Farah
<galaxy><cosmology><radio-astronomy><active-galaxy>
Radio loud AGN restarting as Radio Quiet AGN?
lordparthurnaax
# Radio loud AGN restarting as Radio Quiet AGN?

(Asked by: username_0 on 2020-09-26)

Is it possible for a Radio-loud object (eg., an FRI galaxy) to evolve into a Radio-quiet (eg., a Seyfert) source?

Also, can this happen via AGN restart? That is, have there been instances where the active nuclei in a Radio-loud object switches off, and then restarts as a weaker Radio-quiet source?

**Tags:** galaxy, cosmology, radio-astronomy, active-galaxy
> **Comments:**
> **username_1**: I know a paper by Barišić et al. that concludes that massive, quiescent galaxies at z~1 will switch on a jet mode AGN (radio-loud) about once every Gyr, but not sure if they switch back to radio quiet or quasar mode: https://iopscience.iop.org/article/10.3847/1538-4357/aa8768/meta  
> **username_2**: Possible 2017 paper of interest: https://iopscience.iop.org/article/10.3847/1538-4357/aa745d/pdf  

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## 0 answers

