A Census of Stars: the Hertzsprung-Russell Diagram
- Gaia:
4+ million star HR diagram study
(Gaia Collaboration 2018)
- HR diagrams within 25, 50, and 100 pc
- for 4.2+ million stars
- illustrating the binary sequence
- video and visualization
- Gaia data archive
- deluxe labelled HR diagrams here and here and here
- size comparisons: universe, stars
Stellar Masses and Binary Stars
- stars are social -- most are multiples! (Raghavan+ 2010)
- types of binaries:
- simulations: center of mass, eclipsing binary light curves, orbits, more orbits
- binary stars as gravitational laboratories: stellar masses
The Main-Sequence Mass-Luminosity Relation
- relation plotted here (Eker+ 2018) and here
- implications for nature of Main Sequence
