Flashcards
2022-01-25
What is this??
A Hertzsprung-Russell diagram.
What is on the $x$-axis of a Hertzsprung-Russell diagram??
Temperature.
Which out of luminosity and temperature goes in the wrong direction on a Hertzsprung-Russell diagram??
Temperature.
What is on the $y$-axis of a Hertzsprung-Russell diagram??
Luminosity.
What is sometimes confusing about the temperature values on a Hertzsprung-Russell diagram??
They measure “effective temperature”, not the temperature of the core.
What are the units for luminosity measured on a Hertzsprung-Russell diagram??
Solar luminosity, $L_\odot$
Are the scales on a Hertzsprung-Russell diagram logarithmic or linear??
Logarithmic.
Approximately what path will the sun trace out as it lives out its life??
What section is this??
Red supergiants.
What section is this??
Red giants.
What section is this??
White dwarfs.
What section is this??
Main sequence stars.
What sort of starts does the long diagonal strip on a Hertzsprung-Russell diagram consist of??
Main sequence stars.
Why couldn’t you place a black hole on a Hertzsprung-Russell diagram??
Because it doesn’t really have a defined temperature.
2022-01-26
What is luminosity??
The total power output of a star (same as watts).
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date: 2022-01-25 18:05
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title: Physics - Hertzsprung-Russell Diagrams