2021-01-24
astr-1102
- Chapter 18
- 18.1: A Stellar Census
- Learning Objectives
- Explain why the stars visible to the unaided eye are not typical
- Describe the distribution of stellar masses found close to the Sun
- A stellar census is hard because
- We may not count all inhabitants
- Our local neighbourhood may not include all possible types of stars
- 18.2: Measuring Stellar Masses
- Learning Objectives
- Distinguish the different types of binary star systems
- Understand how we can apply Isaac Newton's version of Johannes Kepler's third law to derive the sum of star masses in a binary star system
- Apply the relationship between stellar mass and stellar luminosity to determine the physical characteristics of a star
- 18.3: Diameters of Stars
- Learning Objectives
- Describe the methods used to determine star diameters
- Identify the parts of an eclipsing binary star light curve that correspond to the diameters of the individual components
- 18.4: The H-R Diagram
- Learning Objectives
- Identify the physical characteristics of stars that are used to create an H-R diagram
- Describe how those characteristics vary among groups of stars
- Discuss the physical properties of most stars found at different locations on the H-R diagram
- Such as radius, mass, etc.