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  1. #1
    Brett Aubrey's Avatar
    Brett Aubrey Guest

    Default Stars: Solar Mass and Life Span Question - Larger Stars?



    From a similar thread where I was given a link (with formula and 8 size
    samples), I ran some numbers on star sizes and longevity and was surprized
    to find that, while the math works fine for the 5 smallest stars, it
    diverges dramatically for the three largest samples. Is the formula only
    applicable for smaller stars? Does some other variable play a part? Or
    what? (I assume the table is correct and not the calculated values.)

    The left two columns and the formula was from:
    http://www.astronomynotes.com/evolutn/s2.htm , while the right column was
    calculated in Excel.

    1/(SM/1)(4-1) × 10^10 years
    star mass
    (solar Calculated
    masses) time (years) (years)
    0.1 1000's billions 10^13
    1 10 billion 10^10
    1.5 3 billion 2,962,962,963
    3 370 million 370,370,370
    5 80 million 80,000,000
    10 32 million 10,000,000 (Diverges)
    30 11 million 370,370 ( -"-)
    60 3 million 46,296 ( -"-)

    Why the divergence?
    TIA. Regards, Brett (still not homework) Aubrey.



  2. #2
    Brett Aubrey's Avatar
    Brett Aubrey Guest

    Default Stars: Solar Mass and Life Span Question - Larger Stars?

    Never mind. I should'a read the site. Regards, Brett.

    "Brett Aubrey" <brett.aubrey@shaw.ca> wrote in message
    news:9%iId.139644$6l.39414@pd7tw2no...
    < snip garbage >



  3. #3
    John Zinni's Avatar
    John Zinni Guest

    Default Stars: Solar Mass and Life Span Question - Larger Stars?

    "Brett Aubrey" <brett.aubrey@shaw.ca> wrote in message
    news:fvjId.139690$6l.132107@pd7tw2no...

    I was just about to say that.
    Glad you caught it first ;-)



 

 

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