Stars: Properties and Classification

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What happens if we increase the mass of the star? n More mass = more gravitational contraction n = need for more balancing pressure = higher temperature at the center (<strong>and</strong> on the surface) n Higher temperature = more hydrogen fusion = higher energy production = more luminous
Thus… n More massive = n Higher Temperature (bluer color) = n More luminous L ~ M 3.5 A star 10 times more massive than the Sun is ~3000 times more luminous!
Page 1 and 2: Stars: Properties and Classificatio
Page 3 and 4: Assigned Reading n Units 52.1-2-3,
Page 5 and 6: n There are four principal characte
Page 7 and 8: 1 (AU) D (in Parsecs) = P (in arcse
Page 9 and 10: Parallax would be easier to measure
Page 11 and 12: Luminosity Luminosity is the total
Page 14 and 15: The Sun radiates an enormous amount
Page 16 and 17: Brightness is different from Lumino
Page 18: Surface Temperature
Page 21 and 22: Spectral Types For historical reaso
Page 23 and 24: Use Temperature and Luminosity to M
Page 25 and 26: L=4πR 2 σT 4 Survey Question Supp
Page 27 and 28: Stellar Properties Survey Questions
Page 29 and 30: Mass: How do you measure the mass o
Page 31 and 32: Binary Stars: use the Generalized K
Page 33 and 34: Summary n There are four principal
Page 35: Nuclear fusion rate rises dramatica
Page 39 and 40: The Hertzsprung-Russell Diagram
Page 41 and 42: The Hertzsprung-Russell Diagram L=4
Page 43 and 44: The Hertzsprung-Russell Diagram Whi

Stars: Properties and Classification

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