Exam3 - Flashcards2 - The flashcards are formatted for...

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H-R Diagram Main Sequence
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Part of the H-R diagram where hotter stars are more luminous. Plots the luminosities and temperatures of stars.
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Luminosity Total Energy
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Proportional to T 4 from a thermal emitter Related to the area under the thermal spectrum
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White Dwarfs Giants and Supergiants
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Stars with lower temperature and higher luminosity than main- sequence stars; must have larger radii. Stars with higher temperature and lower luminosity than main- sequence stars; mush have smaller radii.
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Main Sequence 1. Temperatu re 2. Color 3. Spectral type 4. Luminosity 5. Radius
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Depicted by H-R diagram. Fusing hydrogen into helium in their cores, like the Sun.
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Mass Hot (blue); Cool (yellow or red)
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Luminous main- sequence stars are ____, less luminous ones are ____. Determines a normal, hydrogen-burning star’s luminosity and spectral type.
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Temperature Luminosity
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From brightness and distance. From color and spectral type.
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High-Mass Star Mass
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From period and average separation of a binary-star orbit. In the main sequence, high luminosity, short lived, large radius, and blue.
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Giants and Supergiants Low-Mass Stars
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low luminosity, long- lived, small radius, and red. All stars become larger
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Exam3 - Flashcards2 - The flashcards are formatted for...

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