Extragalactic Astronomy -
Fall 2012
Homework #9 - due November 26
1. What is the approximate redshift of U-band drop out Lyman break
galaxies?
2. Starburst galaxies have a strong spectral feature at what
wavelength?
3. Early-type galaxies have a strong spectral feature at what
wavelength?
4. What is the limiting accuracy for photometric redshifts?
5. What are EROs?
6. What is the K-correction?
7. What is the origin of the X-ray background?
8. Derive an equation for the Jeans mass.
9. At what redshift does the co-moving star formation density peak?
10. What determines the "age" of an elliptical galaxy?
11. How was it first established that gamma-ray bursts are
extragalactic?