Palen A Galaxy Far, Far Away Test Bank - Understanding Our Universe 3e Complete Test Bank by Stacy Palen. DOCX document preview.
Mission 17: A Galaxy Far, Far Away
MULTIPLE CHOICE
1. Which of the following is not a component of AGNs?
a. supermassive black hole d. halo
b. thin inner accretion disk e. relativistic outflows
c. thick torus
2. Which of the following objects is not an example of a galaxy containing an AGN?
a. Seyfert d. lenticular
b. Blazar e. LINER
c. quasar
3. Assume that you measure an emission line from hydrogen gas streaming toward you from an AGN and traveling at 50% of the speed of light. If the rest wavelength of the emission line is 656 nm, which of the following is the wavelength you measure for this line?
a. 164 nm d. 984 nm
b. 328 nm e. 1,312 nm
c. 492 nm
4. The relativistic jets driven by the active galactic nucleus in Centaurus A are traveling at 50% of the speed of light. They extend approximately 330,000 pc into space. How long have these jets been in existence? Assume the jets have maintained a constant speed.
a. 1.9 × 106 yr d. 1.6 × 105 yr
b. 3.3 × 105 yr e. 1.1 × 106 yr
c. 2.2 × 106 yr
5. Centaurus A is part of which nearby cluster of galaxies?
a. Coma d. Antila
b. Virgo e. Hydra
c. Fornax
1. How does the unified model of active galactic nuclei (AGNs) explain Seyfert I, Seyfert II, and Blazar galaxies?