Questions tagged [seyfert-galaxy]

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4 votes
1 answer
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Why do Seyfert Galaxies emit less energy than Quasars and Blazars, and how is the emitted energy measured?

When I was reading information about QSOs on a website, it said that Seyfert Galaxies emit less energy than Quasars and QSOs. Why do Seyfert Galaxies emit less energy than quasars, and how is this ...
3 votes
1 answer
454 views

What is a Seyfert galaxy?

I know Seyfert galaxies are types of active galaxies, but I do not understand what separates them from other types of active galaxies. Are they brighter/not as bright as other types of active ...
2 votes
0 answers
138 views

Luminosity of the Milky Way compared to Seyfert galaxies

This page lists the total luminosity of the Milky Way (MW) Galaxy to be $4\times10^{10}$ $L_{\rm sol}$, and $L_{\rm sol}=3.86 \cdot 10^{33} {\rm ergs.sec}^{-1}$; this gives a total luminosity for the ...