Astro 1050     Wed. Oct. 15, 2003

L, T, R, and the H-R diagram

Lines of constant R in the H-R diagram

Slide 4

Different “types” of H-R diagrams

Luminosity Classes

Spectra of Different Luminosity Classes

Spectroscopic “Parallax”

What fundamental property of a star
varies along the main sequence?

What fundamental property of a star
varies along the main sequence?

Masses of Binary stars

Masses of Binary stars

Masses of Binary stars

Measuring a and P of binaries

Masses and the HR Diagram

The Mass-Luminosity Relationship

Eclipsing Binary Stars