Compute Ratio for Luminosity to Mass: Compare to Sun

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SUMMARY

The discussion focuses on calculating the luminosity-to-mass ratio for a star, specifically comparing a star with a mass of 1 Msun and a luminosity of 1000 Lsun to the Sun's ratio. The computed ratio is definitively 1000 Lsun/Msun. Additionally, the participants discuss estimating the lifespan of very luminous stars as red giants, with a conclusion of approximately 10 million years based on the provided information.

PREREQUISITES
  • Understanding of stellar mass and luminosity concepts
  • Familiarity with the solar mass (Msun) and solar luminosity (Lsun) units
  • Basic knowledge of stellar evolution and red giant phase
  • Awareness of the Hertzsprung-Russell (H-R) diagram
NEXT STEPS
  • Research the Hertzsprung-Russell diagram and its significance in stellar classification
  • Study the life cycle of stars, focusing on the red giant phase
  • Explore the relationship between stellar mass, luminosity, and lifespan
  • Investigate methods for estimating stellar lifetimes based on luminosity
USEFUL FOR

Astronomy students, astrophysicists, and anyone interested in stellar dynamics and evolution will benefit from this discussion.

oldspice1212
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Hi hi hi,

So guys I'm just having a little trouble with this question..

Compute the ratio between the luminosity from part B to the mass from part A. How does that ratio compare with the Sun's ratio of luminosity to mass?

So for part A I got 1Msun and part B I got 1000Lsun

So to compute the ratio I was just wondering I divide Luminosity/ Mass and isn't it just 1000 then? :oEdit: Also how do I estimate the maximum amount of time these very luminous stars can last as red giants from your answer to part C (the question above).
 
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oldspice1212 said:
Hi hi hi,

So guys I'm just having a little trouble with this question..

Compute the ratio between the luminosity from part B to the mass from part A. How does that ratio compare with the Sun's ratio of luminosity to mass?

So for part A I got 1Msun and part B I got 1000Lsun

So to compute the ratio I was just wondering I divide Luminosity/ Mass and isn't it just 1000 then? :o
Yes, the ratio is 1000 LSun/MSun .


Edit: Also how do I estimate the maximum amount of time these very luminous stars can last as red giants from your answer to part C (the question above).
This is an entirely different question.
 
Thanks yeah I noticed that its the only information I had besides I didn't mention the H R diagram. XD sorry about that.I got 10^7 years if anyone is interested for that question.
 

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