Astr 221 October 31, 2003: Magnitude and Wavelengths  

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Spectral, Solar luminosity and Surface temp graph

Question: At a give temp, where will the largest stars be?

Main sequence graph

Question: Whose bigger?

Measuring stellar mass

measuring continued

Kepler's 3rd with stellar measure

Question: What does the parallax error do to the mass estimate?

Binary star systems

binaries and kepler's 3rd

Spectral type graphs

Mass luminosity Graph

Stellar Sizes

Eclipsing binaries

Lunar occultations

Stellar Luminosity functions graph

Stellar Luminosity Function description

The Sun

The Sun's interior and Atmosphere graph

Density and temp of the sun

The Sun as an Average star

Radiative transfer

Displacement of random walking photon

Optical Depth

Using a cylinder

Using few absorbtions

absorbtion and radiation

falloff in transmitted radiation

Absorbtion and a typical gas

Optically thick and thin

Question: What's a reasonable estimate of optical depth of a tree?

Energy flow in the sun