What is the difference between Type 1 and Type 2 Seyfert galaxies quizlet?
Seyfert type 1 galaxies are AGNs with the accretion disk tipped slightly from face-on. Seyfert type 2 galaxies are AGN accretion disks with an edge-on view. The gas in the disk is orbiting at high speeds and short-duration fluctuations in brightness limit the size of the object at the center of an AGN.
What is the most likely reason for the differences between type 1 and type 2 Seyfert galaxies?
What is the difference between Type 1 and Type 2 Seyfert galaxies? Type 1 Seyferts are very luminous at ultraviolet wavelengths and at X-ray wavelengths. Galaxies in close pairs are three times more likely to be Seyfert galaxies than are isolated galaxies.
Why is look back time not important for nearby galaxies quizlet?
Why is look-back time not important for nearby galaxies? Galaxies change very slowly. Which feature of a galaxy seems to be related to the mass of the galaxy’s central supermassive black hole?
What caused the doubling of a quasar image?
Gravitational lensing occurs when light source from an extremely distant object, quasars in this study, encounters an intervening galaxy before it reaches observers on Earth. With a double quasar, their light is lensed around an intervening galaxy before reaching Earth, producing two images of the quasar.
Why are the spectral lines from quasars so odd quizlet?
Later in 1963 Astronomers (Schmidt and others) at Cal tech realized that quasars weren’t stars because they looked at the optical spectra of quasars and saw that those spectrums has strange emission lines. Schmidt realized that Quasars had huge red-shifts so they must be very far away.
Why did galaxies collide more often in the distant past than they do now?
Why did galaxies collide more often in the distant past than they do now? Galaxies were closer together and smaller galaxies were more numerous in the distant past so they collided more often. Galaxies in close pairs are three times more likely to be Seyfert galaxies than are isolated galaxies.
What type of galaxies are considered to be the oldest in our universe?
Elliptical galaxies, such as M87, are the oldest and roundest galaxies in the universe. Astronomers think these galaxies are formed in major mergers—dramatic collisions between galaxies that result in one massive galaxy being entirely consumed by another.
What usually happens when two spiral galaxies collide?
When the galaxies collide, it causes vast clouds of hydrogen to collect and become compressed, which can trigger a series of gravitational collapses. A galaxy collision also causes a galaxy to age prematurely, since much of its gas is converted into stars.
Which of the following is evidence for galactic mergers?
The evidence of this is the distribution of elliptical galaxies in present day clusters. 63 million light years away, the poster child of galaxy mergers is the Antennae, or NGC4038 and 4039: These two galaxies will eventually coalesce into a single, larger galaxy.
What will happen when two galaxies merge?
When galaxies merge, the gasses interact with each other. When two galaxies of the same size are merging, many new stars form, making the merging galaxies brighter. However, if these galaxies merge too quickly, many of the newly formed stars are likely to die shortly after their formation.
How do mergers affect the evolution of the Milky Way?
How do mergers affect the evolution of the Milky Way? Solution: As the Galaxies move through space, they collide with each other and the gravitational disturbance caused by the collision results in bursts of Stars formation. These collisions can also lead to merger of the two galaxies into a single large system.
Why are galaxies moving away from the Milky Way?
The gravitational force between the Milky Way and Andromeda galaxies has produced an acceleration that is causing the two galaxies to be moving towards each other faster than the space between them is expanding as calculated by Hubble’s law.