Types
In addition to being beacons of visible light, type 1 Seyfert galaxies also produce an abundance of?
X-rays and ultraviolet light
Seyfert galaxy nuclei are powered by what?
A black hole
The narrow emission lines are thought to come from which part of a Seyfert galaxy?
The outer part of the nucleus
Seyfert galaxies are thought to be a dim what?
Quasars
Due to their nuclei, are Seyfert Galaxies active or inactive?
Active
The 2nd type of Seyfert galaxy are just as bright as their counterparts but instead produce?
Infrared light and a few shorter wavelengths
The average Seyfert Galaxy is how many times brighter than the Milky Way galaxy?
The broad emission lines are thought to come from which part of a Seyfert galaxy?
Close to the event horizon/center of the nucleus.
What makes Seyfert Galaxies so special and unique to others?
The brightness of the nuclei
Seyfert galaxies are named after which scientist?
Carl Seyfert
Type II Seyfert galaxies show only what kind of Emission Lines?
Narrow emission lines
Active galactic nuclei were first found through observations in the ____ wavelength band.
Radio
What 4 compounds are found in a Seyfert Galaxies emission lines?
Hydrogen, helium, nitrogen, and oxygen.
Seyfert galaxies are unusually what?
Bright
What are the chances that a normal spiral galaxy exhibits Seyfert properties?
1%
In some cases a Seyfert Galaxy will be classified as an intermediate type or 1.5 Seyfert. Why are they classified as such?
The spectra shows both broad and narrow emission lines
How do you determine the luminosity of a Seyfert Galaxy?
Eddington Limit/Luminosity
What effects the emission line of a Seyfert Galaxy?
The speed of the gas around a black hole.
Seyfert Galaxies are usually what type of galaxy?
Spiral
Seyfert Galaxies are extremely similar to what other kind of galaxy?
Quasars
What are the origin of the differences between Type I and Type II Seyfert galaxies?
To this day, it is still unknown.
What do the Seyfert Galaxies alway try to stay in?
Hydrostatic Equilibrium
What do the emission lines of a Seyfert Galaxy come from?
The surface of the accretion disc or the clouds of gas that are illuminated by the central engine in an ionized cone.
Seyfert galaxies appear similar to normal spirals by what?
Their extremely luminous cores.
Out of all galaxies, what percentage of them are Seyfert?
10%