Why Is the Energy Source for Active Nuclei Like Seyferts

question 72

Multiple Choice

Why is the energy source for active nuclei like Seyferts thought to be compact?

• A)The sources appear to be single stars in photos.
• B)Their energy appears to be non-stellar synchrotron radiation.
• C)The light can vary over short time intervals.
• D)We know the masses of the black holes that lurk there, and can find their radii.
• E)They are all strong radio sources, with assigned frequencies by their sizes.

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Definitions:

Reducing Fittings

Pipe fittings used to connect pipes of different diameters, allowing for a change in pipe size.

Antifriction Bearings

Bearings specifically designed to reduce friction between moving parts, often using balls or rollers.

Plain Bearings

Bearings that operate with sliding contact between the moving surfaces, often used for their simplicity and durability.

Antifriction Bearings

Bearings designed to reduce friction between moving parts by using smooth balls or rollers contained within a ring.