Thread: Quasar brightness lower bound, real or my error?
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Old December 27th 16, 02:24 AM posted to sci.astro.research
Phillip Helbig (undress to reply)[_2_]
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Default Quasar brightness lower bound, real or my error?
In article ,
writes:

For this plot of quasar Mag vs z

https://inspirehep.net/record/120804...dist1_dr10.png

There is a lower bound for quasar Mag that looks artificial. At
z=0.4 the lower limit is about M = -23.

Quasars are often DEFINED as AGN brighter than -23. That probably
explains your puzzle.