<p>Urry and Padovani <a href="http://adsabs.harvard.edu/abs/1995PASP..107..803U" rel="nofollow noreferrer">1995</a> proposed a unified model for Active Galactic Nuclei, which has since been recognised as a good model for AGN. If AGN are randomly oriented, then I'd expect there to be more obscured AGN than unobscured, because there would be more orientations that would make us look through the sides, than along the axis:</p>

<p><a href="https://i.sstatic.net/NXFXL.png" rel="nofollow noreferrer"><img src="https://i.sstatic.net/NXFXL.png" alt="enter image description here"></a></p>

<p>Is this the case? In other words, how many obscured-type AGNs (Seyfert 1 or 2 Galaxies, radio galaxies, radio-quiet quasars, NLRs) are there, compared to unobscured AGN (BLRs, blazars, radio-loud quasars)?</p>

CC BY-SA 4.0
2019-07-01T20:45:01.360Z
Nice picture. Does the radio-loud/radio-quite line reflect a real asymmetry, or is just conflating diagrams of two different types of AGN
Steve Linton
CC BY-SA 4.0
2019-07-01T21:28:13.967Z
I think it's just conflating two diagrams, as a concise way of explaining theRL/RQ dichotomoy.
Jim421616
<galaxy><quasars><active-galaxy>
Number of obscured AGN compared to unobscured AGN
Jim421616
# Number of obscured AGN compared to unobscured AGN

(Asked by: username_0 on 2019-06-30)

Urry and Padovani [1995](http://adsabs.harvard.edu/abs/1995PASP..107..803U) proposed a unified model for Active Galactic Nuclei, which has since been recognised as a good model for AGN. If AGN are randomly oriented, then I'd expect there to be more obscured AGN than unobscured, because there would be more orientations that would make us look through the sides, than along the axis:

[![enter image description here](https://i.sstatic.net/NXFXL.png)](https://i.sstatic.net/NXFXL.png)

Is this the case? In other words, how many obscured-type AGNs (Seyfert 1 or 2 Galaxies, radio galaxies, radio-quiet quasars, NLRs) are there, compared to unobscured AGN (BLRs, blazars, radio-loud quasars)?

**Tags:** galaxy, quasars, active-galaxy

> **Comments:**
> **username_1**: Nice picture. Does the radio-loud/radio-quite line reflect a real asymmetry, or is just conflating diagrams of two different types of AGN  
> **username_0**: I think it's just conflating two diagrams, as a concise way of explaining theRL/RQ dichotomoy.  

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## 0 answers

