Shared Flashcard Set
Cards
Term
| How are parallax and distance related (formula)? |
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Definition
| Distance (parsecs)= 1/ Parallax (arc seconds) |
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Term
| What is the difference between apparent and absolute magnitude? |
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Definition
apparent- brightness of star as it appears from earth
absolute- apparent brightness of star if it were at a standard luminosity distance (10 parsecs) |
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Term
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Definition
| the rate at which electromagnetic radiation is emitted from a star or other object |
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Term
| spectral types in order from hottest to coolest |
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Definition
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Term
| What is an HR diagram? What star properties are shown on the HR diagram? Where are the different stars located on the diagram? |
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Definition
| A. Hertzsprung-Russel Diagram is a scatter graph of stars showing the star's Absolute Magnitude (luminosity) vs their spectral types |
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Term
| What is the mass-luminosity relation for main sequence stars? |
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Definition
The greater the mass of a main-sequence star, the greater its luminosity (and also the greater its radius and surface temperature)
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