What type of galaxy is a Seyfert?

Seyfert galaxy, any of a class of galaxies known to have active nuclei. Such galaxies were named for the American astronomer Carl K. Seyfert, who first called attention to them in 1944. Two types are recognized.

Is a Seyfert an active galaxy?

Seyfert galaxies are a type of active galaxy; they are spiral galaxies with extremely bright nuclei. The spectra of Seyfert galaxies are characterized by emission lines from highly ionized gas. In some Seyferts, the emission lines are broadened by random motions up to 10,000 kilometers/second.

Which of the following is a characteristic of a Seyfert galaxy quizlet?

Which of the following is a characteristic of a Seyfert galaxy? The nucleus of a Seyfert galaxy is unusually bright compared with the spiral arms. very distant, intrinsically bright objects, moving away from Earth at very high speeds.

How are Seyfert galaxies different to our own Milky Way?

However, unlike the Milky Way, Seyferts have bright cores that shine across the entire electromagnetic spectrum, a sign that the supermassive black holes at their centres are not idle but are devouring their surroundings.

What does a Seyfert galaxy evolve into?

Type I Seyfert galaxies are very bright sources of visible and ultraviolet light and x-rays. Type II Seyfert galaxies are very bright sources of infra-red and visible light. Type II Seyfert galaxies evolve into Type I Seyfert galaxies. Seyfert galaxies make up about 10% of all galaxies.

What are the characteristics of a Seyfert galaxy?

Type II Seyfert galaxies have the characteristic bright core, as well as appearing bright when viewed at infrared wavelengths. Their spectra contain narrow lines associated with forbidden transitions, and broader lines associated with allowed strong dipole or intercombination transitions.

Which of the following is a characteristic of a Seyfert galaxy group of answer choices?

which of the following is a characteristic of a Seyfert galaxy? The nucleus is unusually bright compared with the spiral arms.

Which one of the following properties do Seyfert galaxies and the Milky Way galaxy share?

The nucleus of a Seyfert galaxy is unusually bright compared with the spiral arms. 69- Which one of the following properties do Seyfert galaxies and the Milky Way Galaxy share? spiral galaxies with extremely active cores.

What do Seyfert galaxies radio galaxies and quasars have in common?

All of the Active Galaxies (Seyferts, Radio Galaxies, Blazars, Quasars) have properties in common: bright nuclei and rapid variability.

What is peculiar about the spectra of Seyfert galaxies?

Seyfert galaxies belong to the family of galaxies with active nucleus (AGN). Peculiar visible spectra, and often strong X and radio emission, from these objects do not originate from stars but are caused by a central supermassive (black hole?) object accumulating gaseous matter from the surrounding galaxy.

What kind of stars are found in spiral galaxies?

-Population I stars (i.e. the sun) tend to be luminous, hot and young, concentrated in the disks of spiral galaxies. They are particularly found in the spiral arms. 1. SBa galaxies have bars, large bulges, and tightly-wound spiral arms. 2. SBb galaxies have bars, medium-sized bulges, and moderately-wound spiral arms. 3.

Where does the energy from active galaxies come from?

Types of active galaxies whose emission comes from a very small region within the nucleus of an otherwise normal-looking spiral system. Active galaxies that emit large amounts of energy in the radio portion of the electromagnetic spectrum.

What kind of galaxy is an elliptical galaxy?

Elliptical Galaxies (Hubble) -Elliptical galaxy is one of a class of galaxies that have smooth spheroidal shapes. -Classified from round (E0) to very elongated (E7). -Most of the galaxies in existence are ellipticals, but most of these are smaller than spiral galaxies.

Which is the largest Bulge in a galaxy?

1. Sa galaxies: the largest nuclear bulges and the most tightly-wound arms. 2, Sb galaxies: middle-size bulges and moderately-wound arms. 3. Sc galaxies: the smallest bulges and loosely-wound (more clumped) spiral arms