Astro 1050 Wed., Nov. 19, 2003
| Today: Extra Credit Articles | |
| Homework 9 questions | |
| Review Ch. 10-13 | |
Chapter 10: The Deaths of Stars
| -- Evolution off the main sequence (=> giant) | ||
| Degenerate Matter | ||
| Planetary Nebulae and White Dwarfs | ||
| Binary Star Evolution (Disks, Novae, etc.) | ||
| Massive Star Evolution and Supernovae | ||
| Q. Massive stars cannot generate energy through iron fusion because: | ||
| c iron fusion requires very high densities. | ||
| c stars contain very little iron. | ||
| c no star can get high enough for iron fusion. | ||
| c iron is the most tightly bound of all nuclei. | ||
| c massive stars go supernova before they create an iron core | ||
Chapter 11: Neutron Stars & Black Holes
| Neutron Stars | |||
| Pulsars (Radio pulsation, lighthouse model) | |||
| Properties (size, density, composition) | |||
| Black holes | |||
| Schwarzschild Radius | |||
| Properties | |||
| Detection (Gravity, X-rays from Disks) | |||
| The discovery of the Galaxy | ||||
| Variable stars as distance indicators | ||||
| Globular clusters | ||||
| The size and overall structure of the Galaxy | ||||
| 21 cm Hydrogen emission | ||||
| Motions in the galaxy | ||||
| The Halo | ||||
| The Disk population | ||||
| Spiral Arms | ||||
| The Nuclear Bulge | ||||
| The Rotation curve and the Galaxy’s mass | ||||
| The origin of the galaxy | ||||
| The Galactic Center | ||||
| Family of Galaxies | ||
| Classification | ||
| Properties of Galaxies | ||
| Distance; The Hubble Law | ||
| Size and Luminosity | ||
| Mass (including Dark Matter) | ||
| Evolution of Galaxies | ||
| Clusters | ||
| Mergers | ||
| 20 multiple choice (3 pts each), 10 true/false (2 pts each), 1 or 2 essay (20 pts total). | ||
| Essay question(s) drawn from these topics: | ||
| The Milky Way galaxy | ||
| The Hubble Law | ||
| Falling into a Black Hole | ||
| Sample questions. | ||
| True/False: | ||
| The Milky Way galaxy is a small galaxy of the Local Group. | ||
| Neutron stars can be found in supernova remnants. | ||
| The Magellanic Clouds are irregular galaxies. | ||
| The more luminous a Cepheid variable star, the shorter its period. | ||
| Elliptical galaxies evolve into spiral galaxies. | ||
| Sample questions: Multiple choice: | |||
| Which sequence below gives objects in order of decreasing size? | |||
| A. Red Giant -> the Sun -> the moon -> white dwarf | |||
| B. The Sun -> the Earth -> neutron star -> 3 solar mass black hole | |||
| C. Red Dwarf -> white dwarf -> the Sun -> neutron star | |||
| D. Red Giant -> white dwarf -> red dwarf -> neutron star | |||
| The center of our galaxy lies in the direction of the constellation of | |||
| A. Ursa Minor. | |||
| B. Ursa Major. | |||
| C. Sagittarius. | |||
| D. Orion. | |||
| E. Andromeda. | |||