How Does a Star's Mass Affect its Properties and Position on the HR Diagram?

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Homework Help Overview

The discussion revolves around how a star's mass influences its properties, including radiated power, surface temperature, lifetime, and position on the Hertzsprung-Russell (HR) diagram. Participants are exploring the relationships between these properties and the underlying physics involved.

Discussion Character

  • Exploratory, Conceptual clarification, Assumption checking

Approaches and Questions Raised

  • Participants are attempting to clarify the relationships between mass and various stellar properties. Questions are raised about the specific equations needed to express these relationships, particularly regarding radiated power and temperature. There is also discussion about the meaning of certain variables and dimensions presented in the context.

Discussion Status

The discussion is ongoing, with participants seeking clarification on the equations and concepts involved. Some guidance has been offered regarding the connections between mass and stellar properties, but there is no explicit consensus on the specific expressions or definitions needed.

Contextual Notes

Participants are navigating potential confusion regarding the definitions of terms and the equations relevant to the problem. There is an indication that the exercise may require multiple expressions or a focus on specific aspects of the relationships being discussed.

MartenAndre
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1. A star in the main series. Explain how the radiated power, surface temperature, lifetime and location in the HR diagram depends on the star's mass.
2.E = 1/4Pi*r^2 (I think, need help with this)
3.I know that the lifetime of the star depends on its mass because of the fusion process, or how fast the atoms in the star fuses (which is connected to the stars temperature). I know that radiation power is L which is how much energi per time it releases. This is found by using
 
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Under 2, I don't see a temperature, radiated power (or is that E? If so, mention it!) lifetime, etc.
 
BvU said:
Under 2, I don't see a temperature, radiated power (or is that E? If so, mention it!) lifetime, etc.

What do you mean? An equation for the temperature, or radiated power?
 
Explain how the radiated power, surface temperature, lifetime and location in the HR diagram depends on the star's mass.
So the exercise is asking for a bunch of stuff, right? My naive idea would be that you need expressions for these things. If you want to do only one, fine with me!
Right now I see an expression for something called E with the dimension of m-2. What is it ?
 

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