How does the hr diagram explain why some smaller cooler stars are brighter than larger hotter stars?

Dalton Borer asked a question: How does the hr diagram explain why some smaller cooler stars are brighter than larger hotter stars?
Asked By: Dalton Borer
Date created: Sun, Feb 14, 2021 11:06 PM

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FAQ

Those who are looking for an answer to the question «How does the hr diagram explain why some smaller cooler stars are brighter than larger hotter stars?» often ask the following questions:

❓ Explain why a cooler star could actually appear brighter than a hotter star?

A cooler star could actually appear brighter than a hotter star because in is not just about the temperature is also depends which one is closer or further away from Earth. Therefore if a cooler star was closer to Earth than a hotter star then the cooler one would appear brighter.

❓ Are smaller stars cooler than bigger stars?

That's an opinion, but if you meant temperature-wise, the answer would be smaller stars because of the gas and pressure.

❓ Are blue stars hotter or cooler than red stars?

According to Wien's law, red stars are cooler than blue stars. This concept can be easier to understand using a light bulb. For example, when you turn off a light, the temperature of the bulb will decrease and you will notice the bulb turning red. The cooler light becomes, you will notice the obvious change in brightness and the color shifts towards red and the intensity is lowered.

1 other answer

In terms of absolute magnitude, a larger hotter star will necessarily be more luminous than a smaller cooler star. However, if a smaller cooler star is much closer to us than a larger hotter star, it may appear to be brighter. None of this has anything to do with the HR diagram.

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